Coriander vs Cilantro

What is the difference between coriander and cilantro?

In the US, cilantro means the fresh green leaves of Coriandrum sativum, and coriander means the dried seeds from the same plant. The two parts have completely different flavors and completely different uses in the kitchen.

This naming distinction is North American. In the UK, South Asia, and most of Europe, the word “coriander” covers both the leaves and seeds. In the US and Canada, the Spanish name “cilantro” stuck for the fresh leaves — brought into everyday language through Mexican-American cooking. The seeds kept the English name.

The result: a US recipe saying “coriander” almost always means seeds. A recipe saying “cilantro” always means fresh leaves. The two are not interchangeable.

One practical benefit: a single planting gives you both. Direct-seed one row in spring, harvest leaves for 4–8 weeks, then let the plants bolt and go to seed. Collect the coriander seeds before they fall, and you have two ingredients from one planting.

Do coriander and cilantro taste the same?

No. Cilantro leaves taste bright, herbal, and strongly citrusy. Coriander seeds taste warm, nutty, and mildly citrusy. The two share one chemical compound — linalool — but in concentrations so different that most people would not recognize them as related.

The flavor comparison in full:

The soap-taste phenomenon affects 4–14% of US adults. A study published in Flavour journal in 2012 identified the OR6A2 olfactory receptor gene variant as the cause. People with this variant smell cilantro’s natural aldehyde compounds as soapy rather than herbal. The variant does not affect coriander seed flavor — the seeds contain those aldehydes in very small amounts.

Can you substitute coriander for cilantro?

You cannot substitute coriander seeds for fresh cilantro leaves in most recipes. The flavors are too different. For cilantro, fresh flat-leaf parsley with lime zest is the closest substitute. For coriander seeds, ground cumin works in most savory dishes.

Best substitutes by situation:

Thai green curry and Mexican pico de gallo both use cilantro as a finishing herb. Dried coriander will not substitute there. Add fresh Thai basil or omit entirely rather than using seeds.

Indian dal and curry recipes often call for ground coriander as a base spice. Fresh cilantro will not substitute at the cooking stage — it would burn off immediately. Add fresh cilantro as a final garnish if you want that flavor element.

When does cilantro bolt and produce seeds?

Cilantro bolts when daytime temperatures stay above 75°F for several consecutive days. In most US climates, spring-planted cilantro bolts in May or June. Fall is the most productive season for leaf harvest in Zones 6–10.

The bolt trigger is day length and temperature combined. Long summer days above 14 hours accelerate bolting even in cool weather. Short fall days and temperatures below 70°F significantly delay it.

Varieties that resist bolting:

• ‘Leisure’ — the most reliable bolt-resistant variety in US trials, extending the growing window by roughly 12–14 days
• ‘Slow-Bolt’ — widely sold in US seed companies, adds 10–12 days compared to standard varieties
• ‘Calypso’ — developed for spring production, adds 10–14 extra days

No variety permanently prevents bolting. Hot weather always wins. Bolt-resistant varieties buy time — they are worth growing, but succession planting is still necessary for a continuous leaf harvest.

Succession planting strategy: sow a new row every 3 weeks in spring, starting 4 weeks before the last frost date. Stop sowing when daytime temperatures reach 70°F regularly. Resume in late August for fall harvest. In Zones 7–10, fall succession planting through October is productive.

For a full planting calendar by USDA zone, check the How to Grow Cilantro guide and confirm your zone at the planting zones guide.

How to grow cilantro for maximum leaf production

Direct-sow cilantro seeds 2–4 weeks before the last spring frost date. Cilantro does not transplant well — root disturbance triggers immediate bolting. Scratch seeds shallowly into the soil, no deeper than ¼ inch, and keep the seedbed moist.

Key growing conditions:

• Soil pH: 6.2–6.8. Test with an inexpensive strip kit from any US garden center.
• Sun: full sun in cool weather (below 65°F). Afternoon shade when temperatures climb above 65°F.
• Spacing: thin to 4–6 inches apart for leaf production. Crowded plants bolt faster and develop more fungal disease.
• Watering: keep the top inch of soil consistently moist until plants reach 4 inches tall. After that, water when the top inch is dry.
• Fertilizer: one application of 10-10-10 granular fertilizer at planting. Avoid excess nitrogen — it promotes fast growth that bolts sooner.

The most common mistake with cilantro is growing it in the wrong season. A September 1 planting in Zone 7a gives three times more usable leaf harvest than a March 15 planting. Match the planting date to the season, not just the temperature at planting time.

Marigolds make useful companions in a cilantro bed. They attract beneficial insects that prey on aphids, which commonly attack cilantro in spring. Plant one marigold every 18 inches along the border of a cilantro bed.

How to harvest coriander seeds from your garden

Harvest coriander seeds when the seed heads turn from green to tan-brown, but before they shatter. Shattering happens within days of the color change, so monitor the plants daily once flowering stops.

Step-by-step seed harvest:

1. When most seed heads on a stem have turned tan, cut the stem 6–8 inches below the lowest seed cluster.
2. Bundle several stems together, heads down, and place them inside a large paper bag.
3. Seal the bag loosely around the stems with a rubber band.
4. Hang the bag in a warm, dry, indoor spot for 7–10 days.
5. Shake the bag firmly. Seeds will fall off dried stems into the bag.
6. Pour the contents through a medium-mesh strainer to separate seeds from stem debris.
7. Spread seeds on a tray for 3–5 days to finish drying before jarring.

A single well-grown cilantro plant yields approximately 1–2 tablespoons of dried coriander seeds. A 4-foot row yields roughly ¼ cup of seeds.

Storage: whole coriander seeds last 3–4 years in an airtight jar in a cool, dark pantry. Ground coriander loses most of its volatile flavor compounds within 12 months. Grind whole seeds in a coffee grinder just before using for the strongest flavor impact.

Will garden-harvested seeds germinate next season? Yes — store a small jar of seeds from your harvest for planting. Fresh garden seeds germinate at 85–95% when planted within 2 years. Seeds from the grocery spice aisle germinate poorly because they are often cracked or processed.

Cilantro in the herb garden with other herbs

Cilantro fits best in a cool-season herb bed alongside flat-leaf parsley, dill, and chervil. All three share similar growing conditions — cool temperatures, consistent moisture, and well-drained soil.

Herbs that prefer warm, dry conditions — including creeping thyme, lavender, and catmint — belong in a separate bed or raised section with better drainage. Cilantro in standing water or hot, dry soil performs poorly in either direction.

Mint is often planted with cilantro in home herb gardens, but the two have incompatible growing requirements. Mint spreads by runners and tolerates wet soil. Cilantro needs moderate moisture and good airflow. Keep mint in a buried container to prevent it from crowding out the cilantro bed.

One advantage of letting cilantro flower and go to seed: the umbel flowers attract parasitic wasps and hover flies, both of which prey on aphids and other soft-bodied pests. The Xerces Society for Invertebrate Conservation lists Coriandrum sativum among the top flowering herbs for supporting beneficial insects in US vegetable gardens. Leaving a few plants to flower is a low-cost way to reduce pest pressure on neighboring crops.

Buying cilantro and coriander in the US

Fresh cilantro is sold in bunches at almost every US grocery store year-round. California-grown cilantro dominates the commercial supply from March through November. In winter, most US grocery cilantro comes from Arizona or Mexico.

Whole coriander seeds are sold in the spice aisle under “coriander seeds” or “whole coriander.” Ground coriander is sold as “ground coriander” or “coriander powder.” Both are available at any major US grocery chain.

One thing to watch: some specialty stores label fresh cilantro leaves as “fresh coriander” on the signage, following British naming conventions. If you see “fresh coriander” at an Indian or Middle Eastern grocery store, it is the same product as cilantro at a mainstream US store.

For growing your own, Bonnie Plants produces one of the most detailed US-specific cilantro growing guides, with regional planting advice by state.

Coriander vs cilantro: quick reference