Start indoors or direct sow?

Direct sow cilantro because its taproot resents disturbance and plants can bolt after transplanting. Indoor starts are possible only in deep biodegradable pots, but they offer little advantage.

When to start Cilantro seeds

Direct sow 1 to 2 weeks before the average last spring frost, then sow every 2 to 3 weeks while weather stays cool. In mild-winter areas, sow in fall through early spring.

How to sow the seeds

Sow seeds 1/4 to 1/2 inch deep in well-drained, fertile garden soil. Space seeds about 1 inch apart in rows or a block, then thin seedlings as they grow. Indoor starting is generally not recommended.

Germination

Seeds usually germinate in 7 to 14 days. Soil temperatures around 55 to 70 F support prompt germination. Keep the seedbed consistently moist until seedlings emerge.

Seedling care

Give plants full sun in cool weather, or afternoon shade where springs warm quickly. Water when the top inch of soil begins to dry, avoiding soggy conditions. Thin plants to about 6 to 8 inches apart for leafy growth and good airflow.

Transplanting & hardening off

Direct sowing is recommended, so no hardening off or transplanting is needed. If you must start indoors, harden plants off briefly and transplant very young with the root ball undisturbed.

Tips

Lightly crush or split the round seed hull before sowing to speed germination. Sow a little seed often instead of one large planting, because warm weather quickly triggers flowering.

General seed-starting guidance for US home gardens; timing depends on your local frost dates and variety. Page updated Aug 4, 2026.