Basil
Also known as sweet basil, dried basil, Genovese basil, Thai basil, holy basil, tulsi
Quick answer
The herb that loses most from drying of anything in this catalogue, and one whose name covers several genuinely different plants. Dried basil is not weak fresh basil; it is a different and much duller ingredient.
- Tastes of
- sweet, clove-like, peppery, citric, cooling
- Heat
- Scoville does not apply
- If you have none
- Parsley — see the limits
Other names
What this spice is called elsewhere, and where the translation is not clean.
basilico
Italian
basilic
French
horapha
Thai
Thai basil is a different variety with a strong anise character. Horapha, kaphrao (holy basil) and maenglak (lemon basil) are three distinct Thai basils and are not interchangeable with each other or with Italian sweet basil.
tulsi
Hindi
Tulsi is holy basil, Ocimum tenuiflorum — a sacred plant in Hindu practice rather than a culinary herb, and not a translation of the basil in a pesto recipe.
húng quế
Vietnamese
vasilikosβασιλικός
Greek
Flavour and aroma
Sweet, slightly peppery and warm, with a clove note behind it and a cooling finish. Thai basil replaces most of that with anise; holy basil replaces it with pepper and bitterness. The dried Italian herb is a shadow of any of them.
Fresh sweet basil is sweet, faintly clove-like and unmistakably lifted, with a citric edge. Dried basil keeps a fraction of that and gains a hay-like flatness that is the absence of the top notes rather than any new flavour.
Dried basil ranges from a dull grey-green to a bright green depending almost entirely on how it was dried. Bright green usually means freeze-dried and usually means better.
Taste, smell and sensation, channel by channel
Smell, taste and the chemical sense of heat and cold are different senses. Each is listed with the compounds evidenced as producing it.
Fresh leaves are soft and bruise readily — they blacken where cut with a blunt knife and where chilled. Dried basil is a light flake that softens into a sauce and disappears.
Heat
Pungency scale: none — this spice is not pungent
No heat. A faint peppery quality, more pronounced in holy basil.
- Linalool — The dominant volatile in Italian sweet basil — floral, sweet and highly volatile. It is the first thing lost to heat and to drying, and its loss is most of what separates dried basil from fresh.(what linalool is)
- Eugenol — The clove note underneath, and considerably more stable than linalool. What survives in dried basil is disproportionately this.(what eugenol is)
- Estragole (methyl chavicol) — The anise character. Low in Genovese basil and dominant in Thai basil, which is the compound-level explanation for why the two taste unrelated.(what estragole is)
- Citral — The lemon note, dominant in lemon basil and present in traces elsewhere.(what citral is)
Pairings
Ranked by how well established the combination is, with the reason and the caveats attached.
Foods
Cheese
ClassicFresh mozzarella and basil is the second half of the caprese, and pesto is basil suspended in hard cheese and oil. Fat carries basil’s linalool, which is why the herb reads so much stronger in a cheese or oil setting than in a watery one — a mechanism rather than a coincidence.
How: Torn with fresh mozzarella and oil; Pounded into pesto with hard cheese and pine nuts
Add alongside: Tomato, Garlic, Black pepper
Tomato
ClassicThe pairing most people would name first if asked for one, and it works on contrast rather than similarity: tomato is acidic and savoury with a green sulfurous edge, and fresh basil is sweet, floral and cooling. The two share no dominant compound. What they share is a season and eight hundred years of southern Italian cooking.
How: Torn over a caprese or a finished pasta; Stirred into a sauce off the heat
Add alongside: Garlic, Cheese, Black pepper
- Fresh basil is destroyed by a minute of simmering. It goes on after the heat is off, and dried basil is not the same ingredient.
Courgette
StrongCourgette is watery and mild and gives a herb almost nothing to fight, which suits basil’s sweetness better than a stronger vegetable would. The pairing is standard through Ligurian and southern Italian summer cooking, usually with the basil added off the heat.
How: Torn over sautéed courgette with oil and garlic; In a summer vegetable soup, stirred in at the end
Add alongside: Garlic, Lemon, Black pepper
Other spices and blends
Garlic
ClassicPesto is the argument. Raw garlic is sharp and sulfurous, basil is sweet and floral, and pounding them together in oil produces something neither suggests alone. The technique matters: a mortar crushes fewer cells than a blade, which keeps the basil green and the bitterness down.
How: Pounded together in a mortar for pesto; Fresh basil added at the end to a garlic-based sauce
Add alongside: Cheese, Tomato, Chilli flakes
- Raw garlic goes bitter and acrid in a food processor faster than basil does.
Bird's eye chilli
ClassicPad kaphrao is the documented case and the combination is specific: Thai holy basil is peppery and clove-like rather than sweet, and bird's eye supplies a sharp heat that sits beside that pepperiness rather than covering it. The pairing works far less well with the sweet Genovese basil most Western shops sell, which is worth knowing before attempting the dish.
How: Pounded with garlic and fried at the start, with basil thrown in at the end; Both stirred through a finished stir-fry off the heat
Add alongside: Garlic, Lemon
- Holy basil and sweet basil are different plants with different flavours. Substituting one for the other changes the dish more than changing the chilli would.
Oregano
StrongThe two halves of an Italian tomato sauce, and they work by division of labour rather than by similarity. Oregano is phenolic and heat-stable and goes in at the start, where it survives the reduction; basil is dominated by a volatile that a minute of simmering destroys, and goes in after the heat is off. A cook who adds both at the same moment has wasted one of them.
How: Oregano bloomed at the start, basil torn in at the end; Both dried, together in an Italian seasoning
Add alongside: Tomato, Garlic, Cheese
- Dried basil in place of fresh loses the contrast entirely: two dried leaf herbs in the same pan at the same time is one flavour, not two.
Blue fenugreek
StrongGeorgian cooking uses dried basil in a way most European kitchens do not — as a warm, slightly aniseed background rather than a fresh green top note — and that dried character is what lets it sit under blue fenugreek instead of competing with it. The combination is standard in khmeli suneli and in the herb mixtures rubbed into pkhali.
How: Both dried, in khmeli suneli
Add alongside: Coriander seed, Marigold
- Fresh basil behaves differently and will read as Italian rather than Georgian
Coriander seed
StrongBoth are sweet-aromatic rather than pungent, and they overlap enough in the citrus register to reinforce rather than argue. Georgian and Thai cooking arrive at the combination independently, which is reasonable evidence it is the ingredients rather than one tradition.
How: Dried basil with ground coriander in khmeli suneli
Add alongside: Blue fenugreek
Bay leaf
GoodA quiet combination rather than a striking one. Bay is a slow background note released by long cooking and basil is volatile and short-lived, so they occupy different parts of a dish in time rather than blending — bay from the start, basil at the end or, in the Georgian dried form, ground in with everything else. Useful, and not a partnership either ingredient depends on.
How: Bay in the braise, basil finishing it
Add alongside: Thyme
- Adding basil early wastes it; adding bay late wastes it too
Chilli flakes
GoodSouthern Italian cooking pairs the two constantly, and Thai cooking pairs their equivalents even harder. Basil’s sweetness and cooling quality read as relief against capsaicin heat, which is the same job coriander does in Mexican food and mint does in South Asian.
How: Chilli bloomed in the oil, basil torn in at the end; In a Thai stir-fry, where holy basil goes in with the heat
- Thai basil and holy basil survive the heat of a wok; Italian sweet basil does not.
Chilli powder
GoodBasil is sweet and volatile and chilli is pungent and non-volatile, so neither obscures the other — the heat sits underneath the aroma rather than in front of it. Georgian ajika is built on exactly this, as is Thai phat kaphrao at the other end of the world.
How: In ajika; Basil stirred through at the end of a chilli-hot dish
Add alongside: Garlic
- Chilli content in khmeli suneli varies by maker and is not universal
Rosemary
SituationalThey share a region and very little else. Rosemary is resinous, camphorous and dominating; basil is sweet, floral and fragile, and rosemary will bury it at almost any ratio. The combination survives in dried herb blends because both are present in small proportion and neither is being asked to lead. In a dish where either is meant to be tasted, pick one.
How: Both in small proportion in a mixed dried herb blend; Rosemary in the roasting oil, basil torn over at the end
Add alongside: Garlic, Thyme, Tomato
- Recorded as situational deliberately. Appearing in the same jar of herbes de Provence is not evidence that two herbs pair.
- Rosemary needs roughly a fifth the quantity of basil to be equally audible.
Shares a blend
Spices that appear alongside basil in the core ingredients of a blend profiled here. That is a record of established use rather than a recommendation, and it carries no proportions.
If you have no basil
What to use instead, and — more usefully — where each replacement stops working.
Use: 1× by volume — Roughly three parts flat-leaf parsley to one part mint, at the same volume as the fresh basil replaced.
Not an imitation of basil and not offered as one. Parsley supplies the green freshness and mint supplies a sweet cooling lift, and together they do the job basil was doing — lifting a rich or tomato-heavy dish at the end — while tasting of themselves. The result is a good dish rather than a poor copy, which is the honest way to handle an ingredient that has no substitute.
| Flavour | Aroma | Colour | Heat |
|---|---|---|---|
| different | different | very close | n/a |
Works for
- Finishing tomato dishes and pasta
- Salads
- Anywhere fresh basil was providing lift rather than identity
Does not work for
- Pesto and any dish named after basil
- Caprese
- Thai and Vietnamese dishes, where the anise note of Thai basil is structural
Cuisine: Moves an Italian dish towards a Levantine register, which is a change worth making deliberately.
Basil
PoorNot a weaker version of the same thing. Linalool, which is most of what fresh basil smells like, is among the most volatile compounds in this catalogue and is largely gone from the dried leaf; what survives is eugenol and a hay note. In a long-cooked tomato sauce, where fresh basil would have been destroyed anyway, dried basil is a reasonable seasoning. Everywhere else it is a different and duller herb.
| Flavour | Aroma | Colour | Heat |
|---|---|---|---|
| partial | different | partial | n/a |
Works for
- Long-cooked tomato sauces
- Dry rubs and marinades
- Bread doughs and dressings where the herb is a background note
Does not work for
- Pesto — the sauce fails outright
- Caprese, or anything where basil is eaten raw
- Finishing a pizza or a pasta, where the fresh leaf is the point
- Thai and Vietnamese cooking, which wants a different basil entirely
SpiceHQ records this as poor rather than giving a ratio, because the usual three-to-one rule implies an equivalence that does not exist. There is no quantity of dried basil that makes pesto.
Preparation and use
Keep fresh basil out of the fridge — below about 10 °C the leaves blacken — and stand a cut bunch in water like flowers. Tear rather than chop: a blunt blade bruises the leaf and turns the cut edges black, and a mortar crushes fewer cells than a knife, which is why traditional pesto is pounded. Add fresh basil off the heat or at the very end, because the linalool that carries its flavour is gone within a minute of simmering. Dried basil is the reverse — add it early to a cooked sauce, and do not bother adding it late, because there is nothing left in it that arrives quickly.
Fresh sweet basil is the defining herb of Ligurian and southern Italian cooking — pesto, caprese, tomato salads, torn onto pizza and pasta — and appears through the Mediterranean wherever tomatoes do. Thai basil goes into curries and stir-fries across Southeast Asia; holy basil is stir-fried hard in pad kaphrao; lemon basil goes into soups and salads. Dried basil has a narrower and legitimate role in long-cooked tomato sauces and in Italian seasoning blends.
- boiling — Destroys sweet basil. Linalool is driven off within minutes of simmering, leaving the eugenol and a hay note — which is why basil goes onto a tomato sauce at the end or after the heat is off, never at the start. Thai basil, dominated by heavier compounds, survives a stir-fry that would flatten the Italian herb entirely.
- grinding — Fresh basil bruises and oxidises where it is cut, turning black at the edges. Traditional pesto uses a mortar for exactly this reason: crushing tears fewer cells than a blade and the paste stays green longer.
- infusing — Steeping fresh leaves in warm oil off the heat extracts the aroma without cooking it off, and is the most reliable way to get basil into a warm dish.
- blooming — Not a basil technique. Hot fat drives off the compounds that matter within seconds.
Convert basil between spoons and grams (a level teaspoon of leaf basil is about 0.7 ± 0.1 g; ground basil is about 1.4 ± 0.21 g)
Appears in: Herbes de Provence, Italian seasoning, Khmeli suneli, Nigerian pepper soup spice
Storage and freshness
| Form | Good for | Conditions | Fridge |
|---|---|---|---|
| Leaf | 6–12 months (typically 9 months) | Cool, dark, dry and closed, and bought in the smallest quantity you can. | No |
Crush a pinch. If it smells of tea or hay rather than of anything sweet, it has nothing left to give and it is better to leave it out than to add it — flat dried basil contributes a dusty note and no flavour. This is the dried herb most worth replacing and the one most often kept longest, because it is used rarely.
- A hay or tea smell
- Grey-brown rather than green
- No sweetness at all on crushing
- Volatilisation of linalool and the remaining top notes
- Fading from green to grey-brown
- Oxidation towards a hay or tea character
Quality is not the same as safety
Stale dried basil is a quality matter and not a safety one. Fresh basil is a different question: it is a soft leaf and spoils, and slimy or blackened fresh basil should be thrown away.
Forms
These forms differ enough to need separate answers: treating them as interchangeable produces a dish that is wrong.
Fresh basil
The form the herb is really for. Torn or crushed, added off the heat.
Sweet, clove-like and lifted, with a citric top note that exists in no other form.
Tear rather than chop. Add at the end or off the heat. Keep at room temperature in water, not in the fridge.
Not interchangeable with leaf or ground
Dried basil is not a substitute for fresh in pesto, in a caprese, or on a finished pizza, and no quantity of it makes up the difference — the compound that carries the flavour is gone rather than diluted. It is a usable seasoning in a long-cooked sauce, where the fresh herb would have been destroyed anyway. Those are the only two positions worth taking on this.
Dried basil
Dried and rubbed leaf. Useful in cooked dishes and not a stand-in for the fresh herb.
Flat and hay-like with a clove note underneath, and little of the sweetness or lift of the fresh leaf.
Add early to a cooked sauce, where its remaining compounds have time to extract. There is no point adding it at the end.
Not interchangeable with fresh
The conventional three-to-one fresh-to-dried rule fails here more badly than for any other herb. Dried basil does not taste like less basil; it tastes like a different, duller herb, because the volatile that defines fresh basil is largely absent. Freeze-dried basil is closer and still not the same.
Species, types and grades sold under this name
Different species, origin types and processing types are different questions — whether it is the same plant, the same crop or the same product — and each is labelled as the kind of difference it is.
Sweet basil
Botanical varietyOcimum basilicum L. · Grown worldwide; the Genovese type is the Ligurian standard
Sold as Genovese basil, Italian basil
The basil of European cooking and the one meant by an unqualified "basil" in an Italian or French recipe: broad, soft, bright green leaves on a green stem.
Sweet, clove-warm and faintly citrus, from linalool and eugenol, with little anise. The linalool is the fragile part, which is why sweet basil is added after the heat.
Not one oil but several, by type and by season. In a collection of cultivars grown side by side, estragole was absent from the Genovese and purple types and present in the Napoletano type, while eugenol, methyl eugenol and linalool were high in most. In cultivars grown across seasons, the balance between eugenol and methyl eugenol shifted with light, temperature and humidity — so the same cultivar can smell more clove-like one month than the next.
Thai basil
Botanical varietyOcimum basilicum var. thyrsiflora · Mainland Southeast Asia
Sold as horapha, húng quế, Asian basil
The same species as sweet basil, in a distinct variety: purple stems and flower spikes, narrower and firmer leaves.
Anise and liquorice, from anethole and estragole, where sweet basil has clove and citrus — and it holds its character through a stir-fry or a curry that would flatten the Italian herb.
Always, in Thai and Vietnamese cooking: swapping sweet basil in changes the dish’s cuisine rather than its strength, and phở served with sweet basil is recognisably a different dish.
Holy basil
Different speciesOcimum tenuiflorum L. · South and Southeast Asia
Sold as tulsi, kaphrao, kra pao
A separate species from sweet and Thai basil, with hairier, often purple-tinged leaves. It is the basil of Thai phat kaphrao, cooked hard in a very hot wok, and in Hindu households a sacred plant kept for worship rather than cooking.
Peppery, clove-like and slightly bitter, dominated by eugenol, with none of Thai basil’s anise.
A eugenol chemotype in the samples analysed by NMR and GC, set apart from the estragole-led and methyl cinnamate-led basils — the chemical basis of its clove character.
Neither sweet nor Thai basil substitutes convincingly for it in phat kaphrao; a dish made with Thai basil instead is a different, anise-led dish. Outside Thai cooking holy basil is rarely called for.
Lemon basil
Different speciesOcimum × africanum Lour. · Thailand, Indonesia and Laos
Sold as maenglak, kemangi
A hybrid of sweet basil and hoary basil, and so a different plant from either parent: small, pale leaves.
Distinctly lemony, from citral, and used raw in soups, salads and with rice in Thai and Indonesian cooking, where no other basil stands in for it.
Commonly confused with basil
Direct comparisons, each with the difference that actually changes what you cook.
Botany
Sweet basil and Thai basil are both Ocimum basilicum — Thai basil is the variety thyrsiflora. Holy basil is a separate species, O. tenuiflorum, and lemon basil is a hybrid.
Lamiaceae
The mint family.
A tender annual of the tropics, to about 60 cm, with soft broad leaves and spikes of small white or purple flowers. Frost kills it outright and cold storage blackens the leaf, which is why fresh basil is the most fragile herb in a supermarket.
Commonly confused with
The dried flowering tops of an Ethiopian basil, used in berbere and spiced butter. Sweeter, more resinous and more clove-like than dried sweet basil, and of unsettled species identity.
How it is grown
The plant, how it is propagated and farmed, what threatens the crop, and where it is produced now. Crop diseases here are plant health, not food safety.
The leaves, cut before flowering.
How it is propagated
- Seed.
Grown from seed, raised in nursery beds and transplanted.
Harvested as leaves; flowering is pinched out because it coarsens the plant.
Growing conditions
- Temperature · 5–30 °C (typically 20 °C)
Growth occurs between 5 and 30 °C and is best at about 20 °C; seed germinates well at 13–25 °C. Sweet basil is killed by frost and is grown as a tender annual in temperate regions, and as a short-lived perennial in the tropics and subtropics.
- Light and shade
Needs at least five hours of direct sun a day. Plants in full sun make more leaves, branches and roots than those in partial shade.
- Soil pH · 4–8 pH
A tolerance of pH 4.3–8.4 has been reported, with 5.5–6.5 optimal, on fertile, light, well-drained soil; the crop has relatively high needs for nitrogen and water.
- Waterlogging
Susceptible to both water stress and waterlogging at every stage of growth.
How it is farmed
- Intensive field crop · The Mediterranean, the United States, Madagascar, India and Thailand
The main areas of commercial sweet basil in the late 1990s. Intensified cultivation and tighter limits on fungicides have brought severe disease outbreaks, and where no fungicide is registered for the crop, as in the United States, cultural measures are the only defence.
Most spices are grown in more than one way; none of these is the only one.
Harvest
Harvested by hand or by machine, depending on the farm.
For fresh or dried leaf, basil is cut just before flowering begins; for essential oil it is cut in full bloom. Plants are cut 10–15 cm above the ground, leaving two to four pairs of leaves to regrow.
One or two cuts a year are taken in temperate regions and three to five in warmer ones.
Pests and diseases of the crop
Fusarium wilt of basil
Fungal diseaseFusarium oxysporum f. sp. basilici · Stems; the whole plant wilts
Can devastate a crop. Brown streaks appear on the stems, the plants grow normally until 15–30 cm tall, then stunt and suddenly wilt from the tip downwards. Only French-type sweet basil is seriously affected. The fungus may survive in soil for eight to twelve years and travels long distances on seed.
Where it comes from and how it is made
Tropical Asia, most likely India, with cultivation spreading west into the Mediterranean in antiquity.
- Egypt — major producer. The dominant supplier of dried basil to world markets.
- India — major producer. Both culinary basil and, separately, tulsi.
- Italy — notable producer. Genovese basil from Liguria carries a protected designation of origin.
- United States — notable producer
- Israel — notable producer
Cut before flowering. Basil harvested after the flower spikes form is noticeably coarser and more bitter.
- Cutting — Leafy stems cut before flowering.
- Drying — Low-temperature air drying, and increasingly freeze-drying for premium product.Why: Basil’s aroma compounds are among the most volatile of any culinary herb, so conventional drying costs more of the flavour here than for any other leaf in this catalogue.
- Rubbing and sieving — Leaf rubbed from stems and sieved.
Graded on leaf-to-stem ratio, colour and volatile oil. Colour matters more here than for most dried herbs because it tracks the drying method, and drying method is most of what separates a usable dried basil from a useless one.
Dried basil has appeared in retail surveys of adulterated herbs, with cheaper green leaf used as a bulking agent. The economics are the same as for oregano: a green flake among green flakes.
An annual, sown and cut repeatedly through the season. Flowering ends useful leaf production, so commercial and domestic growers both pinch out the flower spikes.
Warm and frost-free, with plenty of water — unusually among the herbs on this site, basil is not a dry-hillside plant and does badly on the treatment that suits thyme and oregano.
Processing steps it goes through
Primary processing
Shade drying
Microbial reduction
Irradiation
What processing and storage do to it, as measured
Drying · Decreases Eugenol, Linalool, methyleugenol, eucalyptol (1,8-cineole), volatile oil, drying time
Fresh sweet basil held 32.1 g of volatiles per kilogram, with methyleugenol, eugenol, eucalyptol and linalool the main components. Both convective and vacuum-microwave drying brought the total down to 14.4 g/kg, less than half. Convective pre-drying at 40 °C followed by a vacuum-microwave finish at 360 W kept 16.7 g/kg and gave dried basil in which a panel still found strong fresh and floral notes.
Conditions: Combined method at 40 °C and 360 W · About 250 min for the combined method
What this does not show: Read in the abstract only. The best method still lost about half of the volatiles, and the abstract does not say which compounds were lost most.
Measured on the spice
Drying · Depends on conditions Linalool, Eugenol, volatile oil
Of three ways of drying basil, air drying at room temperature brought about only small losses of volatile components, while oven drying at 45 °C and freeze-drying both decreased the total considerably. Linalool was the major component, followed by eugenol. The odour changed in kind as well as strength: fresh basil was described as fresh, herbaceous and floral, the dried samples as mentholated, spicy, hay-like and earthy.
Conditions: in air · Oven at 45 °C; air at room temperature; freeze-drying
What this does not show: Read in the abstract only, which gives no amounts. Its finding that freeze-drying lost much of the volatiles runs against the common assumption that freeze-drying preserves aroma best, and other studies of other basils may differ.
Measured on the spice
Drying · Depends on conditions Linalool, 1,8-cineole, methyl cinnamate, anthocyanins, total phenolics, volatile oil, colour
Across fresh and dried leaves of a purple basil, the three main volatiles spanned very wide ranges: linalool from 81.19 to 1176.09 µg per gram of dry weight, 1,8-cineole from 45.15 to 816.16 µg/g and methyl cinnamate from 13.20 to 637.65 µg/g. The drying method changed the composition of the volatiles significantly, and microwave drying gave a profile distinct from the others. Raising the convective drying temperature lowered anthocyanin content, whereas raising the microwave power raised it.
Conditions: Convective drying at 45, 50 and 55 °C; microwave at 350, 460 and 600 W · Also freeze-drying and sun-drying; Arapgir purple basil
What this does not show: Read in the abstract and conclusions only. The abstract gives ranges across all samples and does not say which method produced which value, so no ranking of methods is taken from it.
Measured on the spice
Buying and quality
The whole-versus-ground question barely applies here, because the real decision is fresh against dried and the answer is nearly always fresh. Keep a small jar of dried basil for long-cooked tomato sauces, buy freeze-dried if you can find it, and buy fresh — or better, a living plant — for anything the basil is meant to be tasted in. A pesto made with dried basil is not a compromised pesto; it is a different and unsuccessful sauce.
- For dried: green rather than grey, which usually indicates freeze-drying and a much better product.
- A sweet smell on crushing rather than a hay one.
- For fresh: firm unblackened leaves and, ideally, a living plant rather than a cut bunch.
- Named varieties where it matters — Genovese for pesto, horapha for Thai curry.
Graded on leaf-to-stem ratio, colour and volatile oil. Colour is unusually informative for basil because it tracks the drying method, and freeze-dried material is a distinct and better commercial product rather than a premium grade of the same thing.
Grading systems, and who stands behind them
Arapgir mor reyhanı: the registered description (Turkish designation of origin)
Designation specificationTurkish Patent and Trademark Office (register); Arapgir Municipality (registrant) · Applies in Arapgir district, Malatya province, Türkiye · Required to use the name · Registration no. 266, protected from 9 August 2017 and registered 8 December 2017 · Geographical indication
The registered rules of one protected name. They bind producers who use that name and are not a standard for the spice in general.
The registration describes a local purple basil, purple throughout, with soft leaves 5 to 10 cm long and 3 to 6 cm wide, and reports that its seed grown elsewhere loses the colour and some of the aroma. Local seed is sown in seedbeds from March and planted out after the last frost; the plants are watered every four to eight days and fed with rotted manure, with no synthetic fertiliser. Shoots are cut above the first leaf node three or four times a season and sold in bunches as a vegetable. For drying, leaves and stems are laid in shade with moving air, or in half shade under netting, and never in the sun. It names the family, Lamiaceae, and no species.
| Grade | Criteria |
|---|---|
| Volatiles of the plant, 2014 to 2016 | Ranges by share of peak area across three years: linalool 20.00 to 65.90 per cent, 1,8-cineole 4.00 to 19.65, methyl cinnamate 4.20 to 11.35. 130 volatile compounds were found in flower, stem and leaf, fresh and dried. |
| Oil of the dried basil | Ranges by share of peak area across three years: methyl cinnamate 5.24 to 33.15 per cent, linalool 7.15 to 24.88, eugenol 1.70 to 6.37, 1,8-cineole 1.15 to 4.80. |
| Estragole | Not found in the volatiles or the oil in any of the three years. The registration names its absence from the fresh plant, with the purple colour, as what sets this basil apart. |
What it tells you: That basil under this name was grown from local seed in one district and, if dried, dried out of the sun. The figures are ranges the applicant measured over three years, and they move a good deal: linalool led the volatiles in 2015, and methyl cinnamate led the oil in 2016. The inspection may test for them and need not. It is the rule for one protected name.
Physical properties and standards
Moisture, water activity, ash, volatile oil and the like — what standards require kept apart from what has been measured.
| Property | Value | Rule and source |
|---|---|---|
| Moisture (leaf) | 12 % max | Maximum moisture, percent by mass — FSSAI Food Products Standards and Food Additives Regulations 2011, reg. 2.9.42, dried sweet basil leaves (India, statutory; chapter text, Version 4 of 1 August 2025) |
| Total ash (leaf) | 16 % max, dry basis | Maximum total ash, percent by mass on dry basis — FSSAI Food Products Standards and Food Additives Regulations 2011, reg. 2.9.42, dried sweet basil leaves (India, statutory; chapter text, Version 4 of 1 August 2025) |
| Acid-insoluble ash (leaf) | 2 % max, dry basis | Maximum acid-insoluble ash, percent by mass on dry basis — FSSAI Food Products Standards and Food Additives Regulations 2011, reg. 2.9.42, dried sweet basil leaves (India, statutory; chapter text, Version 4 of 1 August 2025) |
| Volatile oil (leaf) | 0.3 ml/100 g min, dry basis | Minimum volatile oil, millilitres per 100 g on dry basis — FSSAI Food Products Standards and Food Additives Regulations 2011, reg. 2.9.42, dried sweet basil leaves (India, statutory; chapter text, Version 4 of 1 August 2025) |
What the law of one country requires before the product may be sold there under this name. It is a floor for compliance and says nothing about how good a lot above it is.
A limit is set by a rule of one kind, in one place; a measurement describes particular samples. Neither is a property of every jar.
Food safety and regulation
Documented hazards in this spice and how regulators measure them. Food safety rather than health effects, and not legal advice: each limit belongs to one authority and one instrument.
Cronobacter
The highest rate in the Prague survey, 4 of 10 retail samples.
What studies of this spice show
Heat resistance · Salmonella enterica (Agona, Tennessee, Mbandaka, Montevideo and Reading) · dried basil leaves, inoculated and equilibrated in a humidity chamber
water activity 0.70 · 75 °C, dry heat · 3.3 min (D-value)
At 75 °C and water activity 0.70, it took 3.30 minutes of dry heat to cut the surviving Salmonella on dried basil tenfold. The same leaves held drier needed far longer: see the record at water activity 0.40. The surrogate organism used to validate industrial processes, Enterococcus faecium NRRL B-2354, needed 6.53 minutes at 0.70.
What it does not show: A laboratory cocktail of five serovars on 1.6 g samples sealed in aluminium pouches. It gives no figure for a commercial steam process, for other herbs, or for naturally contaminated basil.
Heat resistance · Salmonella enterica (Agona, Tennessee, Mbandaka, Montevideo and Reading) · dried basil leaves, inoculated and equilibrated in a humidity chamber
water activity 0.40 · 75 °C, dry heat · 9.14 min (D-value)
Drying the same basil from water activity 0.70 to 0.40 nearly tripled the time 75 °C needed for each tenfold reduction of Salmonella, from 3.30 to 9.14 minutes; for the surrogate Enterococcus faecium it rose from 6.53 to 14.07 minutes. The drier the leaf, the harder the bacteria are to kill with heat.
What it does not show: Water activity was set before heating; the study abstract does not say how it changed inside the pouch at 75 °C. A D-value describes a laboratory kill rate, not the safety of any product.
Prevalence · Salmonella · 7,250 packaged dried spice samples from US retail, 125 g per analysis
Retail prevalence was low: 0.64% for ground or flaked red pepper, 0.56% for ground coriander, 0.49% for dehydrated garlic, 0.25% for paprika, 0.24% for black pepper, 0.19% for basil and for curry powder, 0.15% for oregano, and none found in cumin, sesame or white pepper. Imported shipments of the same spices ran at 1.7–18%, and retail was significantly lower for every spice except dehydrated garlic and basil.
What it does not show: A US survey of 2013–2015; it does not show which step between border and shelf lowered prevalence, or apply to spices bought elsewhere.
Treatment effect · Salmonella · black peppercorns and dried basil leaves, inoculated, in steam-vented packs
5 log reduction, more than
Radiofrequency heating inside a package fitted with a one-way steam vent gave more than a 5-log reduction of Salmonella in 135 seconds for black peppercorns and 40 seconds for dried basil. The vent released excess steam and then resealed, so the spice was treated in the package it would be sold in and could not be recontaminated between treatment and packing.
What it does not show: A laboratory trial, not a commercial process; the abstract reports no measure of aroma, colour or volatile oil after treatment.
Prevalence · Cronobacter spp. · dried herbs, spices and vegetables bought at retail in Prague in 2010, 25 g samples
40 % of basil samples, the highest rate
Cronobacter was found in 4 of 10 basil, 3 of 10 ginger, 2 of 15 caraway, 2 of 12 marjoram, 2 of 10 allspice and 1 of 14 pepper samples, and in none of the cinnamon, oregano or sweet pepper samples, as a 2026 review of dried foods reports the survey.
What it does not show: Known here through the review, not from the survey itself. Ten to fifteen samples of each product from one city, by enrichment, so these are detections rather than counts and not a prevalence for the spice in trade.
Limits that name basil
| Jurisdiction | Applies to | Requirement | Instrument |
|---|---|---|---|
| European Union | Dried herbs | Maximum level 10 µg/kgOchratoxin A | Commission Regulation (EU) 2023/915, Annex I, entry 1.2.5from 2023-05-25 |
Each row states what one authority requires under one instrument; none of them is a rule everywhere, and SpiceHQ does not give legal advice. Figures were read from the instrument on the date recorded in the source library.
Safety
Safety statements on SpiceHQ must cite evidence — they cannot be published on editorial judgement.
Estragole in concentrated basil preparations
Applies to: Basil essential oil and concentrated preparations — not culinary use of the leaf
Estragole, prominent in Thai basil and present in smaller amounts in sweet basil, is one of the substances European regulators have assessed for exposure from concentrated herbal preparations, and the European Medicines Agency’s position is that intake from such products should be as low as possible. That assessment concerns essential oils and sustained medicinal use rather than culinary quantities of the leaf, and SpiceHQ records it as context for anyone using basil oil rather than as a caution about cooking with basil.
Not among the substances that must be declared as allergens under EU Regulation 1169/2011 Annex II or under the United States major food allergen rules. That is a statement about labelling law and not about whether allergy occurs: allergic reactions to spices are documented in the clinical literature and are simply not a labelling category. Where a ground spice presents an allergen risk it is usually through adulteration or shared processing equipment rather than through the plant itself.
History and trade
Basil reached the Mediterranean from tropical Asia in antiquity and had an oddly contested reputation there: some Greek and Roman writers associated it with hostility and misfortune, others with royalty — the Greek basilikos means royal, and the English name descends from it. Its modern identity as the emblematic Italian herb is comparatively recent, and pesto alla genovese in its familiar form is a nineteenth-century Ligurian dish rather than an ancient one.
The dried trade is dominated by Egypt and India. Fresh basil is a high-value horticultural crop grown close to its markets, and Genovese basil from Liguria carries a protected designation of origin.
Claims we do not accept at face value
“Basil was regarded as unlucky or associated with scorpions in classical antiquity.”
contested
Some classical sources do carry hostile associations and others do not, and the tradition is inconsistent across authors and periods. SpiceHQ records it as a documented strand in the classical literature rather than as the classical view of the plant.
In the wider history of spices
Late 4th or early 3rd century BCE · Athens, Attica
Theophrastus on basil and sweet marjoram as garden plants
In the books of his Enquiry into Plants on under-shrubs and pot-herbs, Theophrastus treats several seasoning plants as garden crops, and in these passages says nothing of cooking. Basil is sown in the summer period with cucumber, gourd, purslane and savory, and more than once in a season. It is among the quickest herbs to germinate, in about three days, is also grown from slips, flowers in succession from the bottom of the plant upwards, bears more seed than any other pot-herb and is watered even at noon. Celery, sown after the winter solstice with leeks, is the slowest of all to come up, in forty or fifty days, and he tells a close, curly kind from a more open one with a larger stalk. Sweet marjoram is listed with the rose and tufted thyme among the under-shrubs cultivated as what the translator calls coronary plants, and is raised from seed or from pieces torn off. Thyme has a black and a white form and flowers about the summer solstice. It is from this flower, he says, that the bee gets the honey, and beekeepers judge their yield by how freely it blooms. It is sought by those in Athens who wish to export such herbs, and is said not to grow where a breeze from the sea does not reach.
Contemporary text · Theophrastus
Contested: Read in a translation of 1916 whose plant names are the translator’s. His index gives the basil as Ocimum basilicum, the celery as Apium graveolens and the sweet marjoram as Origanum majorana, but the thyme of these passages as “Cretan thyme”, which he places in the genus Thymbra: not the garden thyme of northern kitchens, so thyme is not linked to this event. The Attic thyme brought down from Hymettus and the tufted thyme are further plants again in his index. The passages give no date; the period is that of the author’s lifetime and the year is a sort key.
Compiled c. 4th to 5th century CE · Roman world
Celery seed and thyme in the sauces of Apicius
In one English translation of the Roman recipe collection known as Apicius, celery seed is named in about fifty of some five hundred numbered entries, and thyme in about thirty. Both belong to the run of seasonings that opens a sauce: pepper, lovage and celery seed, with caraway, cumin, mint or rue, moistened with broth, wine, vinegar or honey. A white sauce for boiled goose has pepper, caraway, cumin, celery seed, thyme and onion. A roast sucking pig is served sprinkled with powdered celery seed, and a recipe for spiced salts takes an ounce each of thyme seed and celery seed and allows parsley seed in place of the celery. Basil appears once in this translation, as green basil crushed with pepper, lovage, cumin and dill for a dish of peas.
Contemporary text
Contested: The counts were made by machine on a translation known to be free, not on the Latin, and take in a few entries that are headings or variants. “Celery seed”, “thyme” and “basilica” are the translator’s renderings: the Latin words behind them were not checked, and his glossary gives basil for ocimum. The date of compilation is the one usually given and was not checked against anything read, so the year is a sort key.
1699 · England
John Evelyn on tarragon and basil in the English salad
John Evelyn’s Acetaria: A Discourse of Sallets, published in 1699, goes through the plants fit for a salad one at a time. Tarragon is “of Spanish Extraction; hot and spicy”, and its tops and young shoots are “never to be secluded our Composition, especially where there is much Lettuce”; his table of salad plants lists it for its tender shoots and tops. Basil “imparts a grateful Flavour, if not too strong”, and the tender tops are to be used very sparingly. Marjoram he sets with hyssop and a Cretan thyme among the hot, spicy aromatics of the kitchen garden, which go under the name of pot-herbs and are “much more proper for Broths and Decoctions, than the tender Sallet”, though some keep the powdered tops and flowers to strew over the colder ingredients. Thyme is named again among the ordinary pot-herbs he leaves out of his account.
Contemporary text · John Evelyn
Contested: One author’s recommendations, in a book addressed to those with gardens; it shows what an educated gardener thought belonged in a salad in 1699, not how common these herbs were at English tables. Read in a reprint of 1937 that says it follows the first edition. He gives the plants Latin names of his own day, calling tarragon Draco herba, and what he means by tarragon’s Spanish extraction he does not explain.
Culture
Recorded by tradition rather than merged into one narrative — these are genuinely different practices.
Liguria and Italy
Genovese basil is a protected designation of origin, grown on specific Ligurian slopes, and the leaves are small, pale and less minty than the large-leaved basil sold elsewhere. Pesto alla genovese is made in a marble mortar with a wooden pestle for a documented reason: crushing rather than cutting keeps the paste green and keeps the bitterness down.
- Pesto alla genovese
- Torn onto pizza and tomato
- Never cooked
Thailand and Southeast Asia
Three basils, three jobs. Horapha — Thai sweet basil, anise-scented — goes into green and red curries and into stir-fries. Kaphrao, holy basil, is the peppery one in pad kaphrao and is cooked hard. Maenglak, lemon basil, goes into soups and salads. Treating them as one ingredient, which English-language recipes routinely do, produces dishes that are recognisably wrong.
- Horapha in curries
- Kaphrao stir-fried hard
- Maenglak in soups
India
Tulsi — holy basil — is a sacred plant in Hindu households, grown in a dedicated pot or shrine and used in worship rather than in cooking. Indian cooking uses basil far less than Thai cooking does, and the plant’s significance in India is religious rather than culinary.
- Tulsi in household worship
- Grown at the threshold or in a dedicated pot
Greece
Basil has a religious association in Greek Orthodox practice — used in blessings and grown by church doors — and is used comparatively little in Greek cooking, which is closer to the classical ambivalence than to the modern Italian enthusiasm.
- Used in Orthodox blessings
- Grown ornamentally rather than cooked with
Tulsi has a substantial role in Ayurvedic tradition. Recorded as tradition; SpiceHQ holds no clinical source on basil and makes no health claim.
What it is called
- Italian: basilico
- Thai: โหระพา (horapha)
- Hindi: तुलसी (tulsi)
- Greek: βασιλικός (vasilikós)
What we do not know
Published openly. A gap we have named is more useful than a gap we have filled with plausible prose.
Not yet established for basil:
- Archaeological evidence
- Historical timeline
- Regulatory limits