Celery seed

• ajmod

  Hindi

  Related to but distinct from ajwain, whose name it resembles.

• graines de céleri

  French

Intensely celery-like with a pronounced bitterness that the vegetable does not have, and a warm slightly nutty finish. The bitterness is the thing to respect: celery seed is not a concentrated stock cube so much as a concentrated celery leaf, and used at vegetable-like quantities it turns a dish harsh.

Immediately and unmistakably celery, and far more concentrated than the vegetable — green, slightly medicinal, with a warm earthiness behind it. A jar opened in a kitchen is recognised instantly by anyone who has eaten celery.

Brown to grey-brown, minute, oval and finely ribbed, with a slightly dusty appearance in bulk. Individual seeds are hard to make out without looking closely.

Hard, tiny and slightly gritty, staying whole in a dish and giving a small burst when bitten. Because the seed is so small it is easily overlooked in the mouth, which is why it is often left whole.

• Phthalides — 3-n-butylphthalide and sedanenolide — The compounds responsible for the characteristic celery aroma, present here at far higher concentration than in the stalk. They are what make the spice recognisable in a fraction of a second and are close to unique to this plant group.
• Limonene and beta-selinene — The bulk of the volatile oil, contributing the citric lift and the woody background beneath the phthalides.

Use less than instinct suggests. Celery seed is far more concentrated than the vegetable and carries a bitterness the stalk does not, so a teaspoon seasons a large pot and a tablespoon will make it harsh. Add it whole and early to a brine, stock or braise, where it has time to disperse; toast it briefly first if you want the bitterness rounded off, watching it closely because a seed this small burns in seconds. Grind it only for a rub or a blend, and halve the quantity when you do. The most useful thing about it is that it puts celery into a dish that has none, which is why it belongs in a store cupboard even for cooks who never buy the vegetable.

Pickles and brines above all, then coleslaw and potato salad dressings, tomato juice and Bloody Marys, stocks and soups, barbecue rubs, sausage seasoning, breads and savoury biscuits, and Chesapeake-style seafood seasoning. It works with tomato, cabbage, potato, carrot, cucumber, celery itself, pork, crab, prawns and eggs, and alongside mustard seed, black pepper, dill seed, paprika and bay leaf. Its most useful property is giving a dish celery character without a head of celery in it.

• toasting — Brief dry-toasting rounds the bitterness and brings out the nuttiness. The seed is very small and burns quickly, so the window is short and the pan should be moderate.
• grinding — Ground celery seed is markedly more bitter than whole and much more forceful, and it is the form used in celery salt and in blends. Grind sparingly and use less than the whole-seed quantity.
• boiling — Simmered in a stock, brine or braise, where it disperses well and gives celery character to a dish with no celery in it. This is its most useful property.
• infusing — Steeped in vinegar or brine for pickles and dressings, where it extracts readily and does not need heat.

Crush a pinch between finger and thumb and smell. Celery seed is one of the most instantly recognisable spices there is when fresh, and if the smell is not obviously celery within a second the seed has gone. Because the bitterness outlasts the aroma, a stale jar will still make a dish taste of something — just not of celery.

• No obvious celery smell when crushed
• A merely bitter or dusty taste
• Caking in the ground form

• Volatilisation of the phthalides, which takes the celery identity and leaves the bitterness
• Oxidation of the seed oil towards a stale note
• Moisture uptake and caking in the ground form

Buy whole, and buy a small jar. Whole celery seed keeps for two years or more where ground fades within months, and most of its uses — pickles, brines, dressings, stocks — want it whole anyway. Grind it yourself if a rub calls for it, and use about half what you would use whole, because grinding sharpens the bitterness. Be clear about what you are picking up: celery salt is mostly salt and is a seasoning rather than a spice, and swapping it for celery seed by volume will oversalt whatever it goes into. And check the smell before buying if you can, since spent seed with the oil extracted looks exactly like the real thing.

• A strong, immediate celery smell when a pinch is crushed — the most reliable test there is for this spice.
• Clean and free of grit and dust, which is the characteristic fault given how small the seed is.
• Uniform brown colour with no pale or broken material.
• Whole seed rather than ground, and celery seed rather than celery salt unless salt is what you want.

Commercial grading turns on volatile oil content, cleanliness and admixture, none of which reaches a retail packet — so the crush-and-smell test does the work. Note that seed from which the oil has been extracted looks completely normal and smells of very little, which makes the smell test the only defence against it.

Apiaceae

A biennial of damp temperate ground, grown for seed as a smallage or wild-type form rather than as the blanched salad vegetable. It bolts in its second year to umbels of tiny greenish-white flowers that set the seed. The plant grown for seed is leafier, more bitter and more strongly aromatic than the stalk celery it is related to.

The Mediterranean basin and western Asia, where the wild form grows on damp and brackish ground, with seed production now concentrated in India.

• India — major producer. By some distance the largest producer of the spice, chiefly in Punjab and Gujarat.
• China — notable producer
• France — notable producer
• Egypt — notable producer

Cut when the umbels have browned and before the seed sheds, which happens readily. As with the other Apiaceae seeds the window is short and is judged on the oldest umbels.

1. Cutting — Plants cut as the earliest umbels brown, often early in the day.Why: Ripe celery seed sheds very easily and a late cut loses much of the yield.
2. Curing and threshing — Left to dry, then threshed to release the seed from the umbel.
3. Winnowing and cleaning — Winnowed to remove stalk and chaff. Because the seed is so small, separating it cleanly from dust and soil is the demanding step.Why: Grit is the characteristic fault of a poorly cleaned lot and is unpleasant in the mouth.
4. Grading — Graded on cleanliness, admixture and volatile oil content. A share of the crop goes to oil and oleoresin extraction rather than to the spice trade.

Commercial grading turns on volatile oil content, cleanliness and freedom from grit and foreign seed. Oil content is the meaningful quality measure and does not appear at retail.

The recorded risks are grit, dust and chaff to make weight — a real hazard with a seed this small — and admixture with other small Apiaceae seed. Spent seed from which the oil has been extracted has been reported, and looks entirely normal.

Grown as an annual or biennial field crop specifically for seed, using seed-type cultivars rather than the vegetable ones. Yields are low per unit area, which is part of why the spice is not cheap by weight despite being unglamorous.

Temperate to subtropical, needing moist fertile ground and a cool period to trigger bolting. It is grown as a winter crop in the Indian producing regions.

The plant is old in the Mediterranean world — wild celery appears in classical sources and had a funerary and garland role in Greece before it had much of a culinary one — and the seed as a traded spice is a later and quieter development. Its modern prominence is largely American, through celery salt and the pickling and barbecue traditions, and largely Indian, where the seed is grown and used under its own names.

A bulk commodity rather than a luxury, traded chiefly from India and split between the spice market and extraction for oil and oleoresin, which the food industry uses for celery flavouring far more than most consumers realise.

Documented traditional use across European, Ayurvedic and Unani traditions, chiefly as a diuretic and for joint complaints. Recorded as documented tradition. SpiceHQ holds no clinical source for celery seed and makes no health claim about it — which is worth stating explicitly here, because celery seed extract is marketed as a supplement on claims this dataset cannot assess.