Coriandrum sativum Seeds | Longstanding Cilantro
LATIN NAME: Coriandrum sativum
COMMON NAME: Longstanding Cilantro
Plant Profile
Coriander is the odd one out in a family of flat or elongated fruits. Most Apiaceae — dill, carrot, fennel — carry flattened or winged achenes built for wind and hitchhiking; Coriandrum sativum sets a globose fruit, a schizocarp that splits at maturity into two hemispherical mericarps with wavy primary ribs and flatter secondary ones. That round fruit is one of the species’ easiest field marks.
Below the flowers the plant shows a second oddity: heterophylly. The basal leaves are broad and shallowly lobed — the “cilantro” leaf cooks chop — while leaves formed higher on the bolting stem break into fine, thread-like segments. Both sit on one plant, which is why novices sometimes mistake the top growth for a weed seedling.
English borrowed twice. “Coriander” comes through Latin from Greek koris, the bedbug, because the crushed unripe foliage carries a rank, aldehyde edge that people likened to the insect’s smell. “Cilantro” is simply the Spanish word for the same plant, kept by North American cooks for the fresh leaf while the dried fruit keeps the older name. Botanically nothing differs: leaf, stem, root and fruit all belong to one Coriandrum sativum.
Bolting is triggered by heat, lengthening days and any check to the taproot. Breeders attacked it by keeping only plants that stayed in the leaf stage longest, and ‘Longstanding’ is the classic result: a taller, later strain that keeps cuttable rosette leaf going into warm weather, at the cost of a slightly slower start. For a household that wants cilantro on the plate rather than coriander in the jar, that is the entire point of the cultivar.
Harvest when stems stand 10–15 cm: cut whole stems a few centimetres above the crown and the plant pushes fresh growth from the base. Cilantro leaf does not freeze well raw, though chopping it with a little water into ice-cube trays holds some of the character; drying reduces it to a shadow of itself, so grow it fresh if leaf is the goal.
Science & Biotechnology
The famous split personality of coriander is chemical. The fresh leaf owes its penetrating, soapy-citrus smell chiefly to straight-chain aldehydes, with (E)-2-decenal the loudest note; the ripe fruit smells warm and sweet because its essential oil is dominated by linalool — the (+)-form is sometimes called coriandrol — backed by geraniol, camphor and smaller terpenes. Whether the leaf tastes fresh or like soap to a given person appears to run partly on olfactory genetics: variants of a receptor called OR6A2 tune how strongly those aldehydes register.
Uses & Benefits
Commercial coriander oil is steam-distilled from fruit harvested grey-brown and fully dried on the plant. The distillate is a workhorse of the flavour and fragrance trades, and gin distillers rank coriander among the standard botanicals alongside juniper. On a kitchen scale the same fruit can be crushed into pickling spice, toasted for curry blends or ground fresh for baking, where the linalool note survives gentle heat far better than leaf aldehydes do.
Pressed from the fruit, the fixed oil is unusually rich in petroselinic acid, an unsaturated fatty acid built differently from ordinary oleic acid — a quirk that has kept coriander seed on oleochemistry benches as a candidate renewable feedstock. A spice, a flavour oil and an industrial raw material all hang on one round fruit.
Growing from Seed
Three crops from one sowing. The leaf is chopped into salsas and chutneys, scattered over pho and biryanis at the last moment — its aldehydes fade fast in heat — and blended, stems and all, into green sauces. The root, a slender pale taproot, is pounded into Thai curry pastes with garlic and white pepper, a use South-East Asian cooks kept and Western ones largely forgot. The fruit seasons garam masala, Egyptian dukkah, Belgian witbier and cured sausages, and pairs naturally with cumin, chilli and lemon zest.
Mix two parts loam, one part screened compost and one part coarse sand or perlite; coriander wants free drainage around its taproot more than it wants richness. Sow in place — the plant resents transplanting — about a centimetre deep, rows 30 cm apart. When seedlings show two true leaves, thin to one stand every 8 cm; crowding produces the weak growth that aphids find first.
Keep moisture even, because a dry check hurries the flower stalk. Split-feed nitrogen lightly after each cutting rather than pushing one heavy dose, and water at the soil, never overhead — wet foliage invites bacterial leaf spot. Through the cool season, resow short rows at intervals so a young stand is always coming on behind the one being cut, and shade out fierce afternoon sun in hot spells.
Hoverflies and parasitoid wasps work the umbels, so let one or two plants bolt at the row’s end as a beneficial-insect banker, saving their seed for next year once the fruit turns brown and dry.
Our Take
Cut hard, sow often, and do not mourn the first bolt — that plant is now your seed line. If you want to compare bolt behaviour across the fresh-leaf family, the Santo Cilantro Coriandrum sativum page sits well beside this one, and the general Cilantro Coriandrum sativum listing covers the wider range. Dill, an umbel cousin with the same love of cool ground, makes a natural companion row — see the Dill Anethum graveolens article.
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