How to Grow Cilantro

Cilantro (Coriandrum sativum) is a dual-purpose herb — the leaves are harvested as the fresh herb used in Mexican, Indian, Thai, and Middle Eastern cooking, while the dried seeds are the spice coriander, used in completely different culinary applications. Growing your own cilantro delivers leaves far more aromatic and flavorful than grocery store bunches, which lose much of their volatile oils within days of harvest.

Cilantro is a cool-season herb that bolts (rushes to flower and seed) quickly in heat and long days. This makes timing critical and succession planting essential for a consistent supply. Once you understand that a single planting lasts only 3–6 weeks before bolting, you can plan a continuous harvest by sowing small amounts every 2–3 weeks throughout the cool season.

Growing Tips

Use slow-bolting varieties like 'Santo' or 'Leisure' — they remain in leaf stage significantly longer than standard varieties, which is critical in warm climates and helps in any climate. The difference can be 2–3 extra weeks of leaf harvest before flowering.
When plants bolt, don't pull them — let them flower and set seed. Cilantro flowers attract beneficial insects, and the seeds that fall will germinate as volunteers the following season in exactly the right conditions. Essentially, bolted plants plant the next crop for you.
Harvest entire small plants rather than snipping individual leaves when succession-sowing densely. Cutting at soil level at 4–5 inches tall allows new plants below to take over. This 'cut-and-come-again' approach works best in dense plantings during cool weather.
Grow cilantro near dill but not too close — the two herbs cross-pollinate and can produce seed that germinates as a hybrid with muddled flavor. Keep them separated by at least 3–4 feet if you intend to save seeds from either.
For coriander seeds, allow plants to fully bolt and set seed. When seed heads turn brown and papery, cut the stalks and hang upside down in a paper bag in a warm, dry place. After 1–2 weeks, shake the bag to release the seeds. Fresh-ground coriander is far more aromatic than commercial ground coriander.

Companion Planting

Cilantro's flowers attract parasitic wasps and hoverflies that prey on garden pests. Allowing some plants to bolt and flower intentionally provides this pest-management benefit. The planner helps you identify where succession plantings of cilantro can fit between your primary rows.

FAQ

When should I plant cilantro?

Sow cilantro directly in the garden in early spring (4–6 weeks before last frost) and again in late summer (4–6 weeks before first fall frost). In warm climates (Zones 7+), fall through winter is the primary season. Avoid planting during the heat of summer — cilantro bolts immediately in temperatures above 75°F with long days. Succession-sow every 2–3 weeks for a continuous supply.

Why does my cilantro keep bolting?

Cilantro bolts in response to heat above 75°F and long days. This is genetically programmed and cannot be fully prevented, only delayed. Use slow-bolting varieties, provide afternoon shade, sow during cool seasons, water consistently, and succession-plant every 2–3 weeks. A single planting in summer will bolt within days regardless of what you do — cool-season planting is the real solution.

Can I eat cilantro after it bolts?

Yes — bolted cilantro is fully edible. The leaves become more feathery and slightly less mild, the flowers are edible with a milder cilantro flavor, and the green seeds (just after flowers drop) have an intense, complex flavor excellent in fresh salsa and chutneys. Allow seeds to fully mature and dry for the coriander spice. Nothing from a bolted cilantro plant goes to waste.

Why doesn't my cilantro taste like what I buy in stores?

Homegrown cilantro is typically far more aromatic than store-bought, not less. If your cilantro lacks flavor, it may be bolting (feathery leaves indicate bolt stage), growing in insufficient light, or harvested too late. Harvest cilantro when leaves are broad and aromatic — the broad-leafed stage before flower stalk emergence has the most intense flavor. Use fresh immediately after cutting for peak aroma.

Does cilantro grow back after cutting?

Yes, though regrowth depends on the plant's stage and the cutting method. When leaves are cut at the stem tips, the plant regrows from lower stems for 2–3 additional harvests. Once the central stalk begins to elongate toward bolting, cutting is less effective at promoting bushy regrowth. Regular cutting during the leaf stage delays bolting and extends productivity.