Dried Coriander Seed vs. Fresh Green Coriander: Two Stages of One Fruit

Let a cilantro patch run to seed in summer and you’ll find a second spice in it: green, unripe coriander. Chef Alan Bergo describes it as a bit like a cross between dried coriander seed and cilantro.¹ It’s the same fruit as the familiar dried seed, just picked earlier, and the stage changes the chemistry. As the fruit ripens, the sharp aldehydes it shares with the leaf disappear from its oil, and linalool takes over in the ripe seed.²

Here, “dried coriander” is the ripe seed and “fresh coriander” is the green one picked before it dries. Where you live changes what these words mean. In North American English the leaves are cilantro and coriander usually means the seed, but the word coriander itself names a plant whose leaves are used as an herb and whose seeds are used as a spice. Looking for dried versus fresh leaves? See dried vs. fresh cilantro.

Side by side

The difference is ripeness

PROSEA, the Southeast Asian plant reference, notes volatile compounds with what it calls a bug-like smell in the roots, stems and leaves. As the fruit ripens, it says, the aldehydes in its oil disappear and the smell changes noticeably. What’s left in the ripe seed is mostly linalool: PROSEA’s composition table gives 63.8%, with camphor and p-cymene in smaller amounts. In the leaf, by comparison, aldehydes make up more than 80% of the volatile oil.²

So green coriander isn’t a “fresh” version of the spice the way fresh ginger is to dried ginger. It’s the fruit at an earlier stage, before its chemistry switches over. We couldn’t find any published analysis of green coriander’s oil, so the idea that it sits between leaf and seed rests on PROSEA’s account of ripening² and on how cooks describe it,¹ not on a measurement.

Using dried coriander seed

PROSEA says the fruit shows up as a spice in a huge number of dishes, and that curry powder can be up to 40% coriander.² USDA’s purchasing specification lists coriander among curry powder’s ingredients too.⁴ It also goes into cookies and other baked goods, soups, casseroles and sausages, and Arabic cooking uses both leaves and seeds in pickles, curries and chutneys. It often turns up in garam masala, but not every version has it. Bong Eats describes the most basic Bengali garam masala as cardamom, cinnamon and cloves, while Healthline lists coriander as a garam masala ingredient.⁵⁶

Ratio (Attributed): for whole to ground, McCormick says 1 teaspoon of seeds equals 1 1/4 teaspoons ground.⁷ That’s a volume conversion (ground spice takes up more room), not a strength figure. PROSEA says crushed coriander loses its oil quickly while whole seed keeps it for years,² so buy whole and grind as you need it.

Using fresh green coriander

Bergo suggests chopping it into salsa for extra punch, adding it to sauces and dressings, using it with raw fish, tartare and sushi, and crushing it into pickles and brines. He calls fermenting the seeds in brine a good way to preserve them, and in a reply to a reader recommends a 3 to 5% brine for caper-style seeds. He says fresh green seeds can last for weeks in the fridge and suggests freezing them in a jar.¹

Green coriander is mostly a gardener’s ingredient. Cilantro is a cool-season crop that bolts, or runs to seed, in hot weather, so a summer patch that’s gone to flower is where most people will find it.

Can one stand in for the other?

Only partly.

• Green coriander in place of dried, in pickles and brines. The best fit, since Bergo already crushes green seeds into pickles.¹ Expect a greener, more cilantro-like result. Ratio (Method): start with roughly the same volume, crushed, and taste the brine after a day or two.
• Green coriander in place of dried, in spice blends or rubs. Doesn’t work. The fresh seed is moist and won’t grind to a powder or keep in a dry blend.
• Dried coriander in place of green, raw. The flavor’s different, and whole dried seed is too hard to eat raw. If a recipe wants green coriander’s leafy note, try a little chopped fresh cilantro plus a pinch of freshly ground coriander seed to cover both sides. We found no test of that pairing as a substitute, so start small and taste.

For other stand-ins for the dried seed (cumin, caraway, curry powder), see coriander substitutes. For the leaf, see cilantro substitutes.

What isn’t known

• We found no published analysis of green (unripe) coriander’s oil; its chemistry is inferred from PROSEA’s description of ripening.
• No source compares the size of green and dried seeds.
• How long brined or frozen green coriander keeps its flavor: not measured in any source we reviewed.

Related

• Coriander: the full seed profile, including production and storage
• Cilantro: the leaf profile
• Coriander substitutes and cilantro substitutes
• Coriander vs. cilantro and dried vs. fresh cilantro
• Dried herbs vs. fresh: the general rules for leafy herbs
• Cooking with coriander, how to store coriander and too much coriander
• Coriander vs. cumin, curry powder and garam masala