How to Start Tarragon From Seed
Tarragon seed produces Russian tarragon or seed-grown types, which are generally more vigorous but less refined in flavor than French tarragon. True French tarragon does not produce viable seed and must be propagated from plants or cuttings.
Start indoors or direct sow?
Start seed-grown tarragon indoors and transplant after frost for the most dependable results. Direct sowing is possible in mild areas, but slow, fine seedlings are easier to manage in containers.
When to start Tarragon seeds
Sow indoors about 6 to 8 weeks before the average last spring frost. Direct sow only after frost danger has passed and the soil has begun to warm.
How to sow the seeds
Surface sow or cover seeds very lightly, no deeper than 1/8 inch, in sterile seed-starting mix in cell packs or small pots with drainage. Keep the mix lightly moist in a bright, warm setup, and avoid oversized containers that stay wet too long.
Germination
Germination often takes about 10 to 20 days. Maintain soil around 65 to 75 F and keep it evenly moist but never saturated.
Seedling care
Provide strong light after emergence and water only when the mix begins to dry near the surface. Ensure airflow and clean growing conditions to prevent damping off, then thin or separate seedlings so each plant has room to develop.
Transplanting & hardening off
Harden seedlings off for 7 to 10 days after frost danger has passed, then transplant into full sun and well-drained soil. Space plants about 18 to 24 inches apart and set them at the same depth they grew in their containers.
Tips
Buy seed only if Russian or seed-grown tarragon is what you want; purchase a named French tarragon plant for classic French tarragon. Do not overwater, especially in cool weather, because tarragon prefers well-drained conditions.
General seed-starting guidance for US home gardens; timing depends on your local frost dates and variety. Page updated Aug 4, 2026.