Welsh Onion

Welsh onions can be sown indoors in early spring, or directly outdoors once the danger of frost has passed. Seeds can be scattered thinly in trays or carefully placed into plug trays, or sown directly where they are to grow.

Sow seeds on the surface or cover with just a very thin layer of compost, then gently firm the soil. Keep the compost consistently moist but not waterlogged. Germination is usually reliable and often begins within 10–14 days, though it may take a little longer in cooler conditions.

When seedlings are large enough to handle, thin or transplant as needed. Plant out into their final position once plants are well established, allowing a spacing of around 20–30cm between clumps. Welsh onions do not form large bulbs but grow in upright clumps of stems that can be harvested over a long period.

Welsh onions prefer full sun and reasonably fertile, well-drained soil, though they are tolerant of a wide range of conditions. Once established they are hardy, perennial plants that will return year after year. Plants can be harvested as needed by cutting stems at the base, and clumps can be divided every few years to maintain vigour and provide new plants.