French tarragon has slender leaves and a refined aniseed flavour for chicken, egg and fish dishes. It is the worthwhile culinary choice, unlike coarse Russian tarragon, which is often seed-raised and weakly flavoured. In Britain, this perennial needs warmth, shelter and excellent winter drainage.

When and how to sow

Buy French tarragon as a plant or obtain a division in spring, as genuine French tarragon does not come true from seed. Plant after the last spring frost in a warm, sheltered sunny position. Use light, sharply drained soil, improving heavy ground with grit. In colder parts of Scotland and northern England, a large pot is often safest, as it can be moved under cover for winter.

Care

Water moderately in dry weather, allowing the surface to dry between waterings. Tarragon dislikes rich, wet conditions, so keep the crown clear and do not overfeed. Divide established clumps in spring every few years to renew them. In autumn, protect the crown with a dry mulch, or move potted plants into a frost-free greenhouse.

Common problems

Wet soil is the main cause of failure, leading to crown and root rot. Raise beds, use gritty compost in pots and ensure containers drain freely. Damp, crowded leaves can develop mildew or rust. Remove affected growth, improve airflow and water the soil rather than splashing the foliage. Aphids occasionally visit new shoots.

Harvest

Cut leafy sprigs through summer once the plant is growing strongly. Snip just above a leaf joint to promote new side shoots, taking only a modest amount at each harvest. Flavour is best fresh in sauces and cooked dishes. Ease off heavy picking towards late summer so plants prepare for winter.

Growing Tarragon: frequently asked questions

When should I sow tarragon in the UK?

Buy French tarragon as a plant or obtain a division in spring, as genuine French tarragon does not come true from seed.

What are common problems when growing tarragon?

Wet soil is the main cause of failure, leading to crown and root rot.

When is tarragon ready to harvest?

Cut leafy sprigs through summer once the plant is growing strongly.

General guidance for UK home gardens and allotments. Reference figures are typical values; your exact timing depends on your region, last-frost date and variety. Page updated 19 Sep 2026.