Allium fistulosum (Welsh onion) 9 cm Pot

Growth habit & appearance: Allium fistulosum forms neat clumps of upright, hollow cylindrical stems with a bright blue-green sheen, each leaf tube widening slightly at the base to form a compact fan. In summer it produces rounded white flower heads packed with small star-shaped blooms that are highly attractive to bees, hoverflies and other beneficial insects. The plant has the distinctive onion aroma of the Allium family, and its fresh green stems provide both ornamental and culinary appeal.

Growing conditions: Fully hardy in the Irish climate, Welsh onion thrives in full sun and well-drained but moisture-retentive soil enriched with organic matter. As a species long cultivated across Asia and parts of Europe, it adapts well to cool summers and regular rainfall. Supplied in a 9 cm pot, it can be planted out once the soil is workable. In open sites, taller stems may benefit from light support to prevent them from leaning in strong winds or heavy rain.

Traditional & herbal uses: Traditionally, the fresh juice of the plant has been noted for antimicrobial properties and has been used historically for coughs, colds and general respiratory discomfort. It is also referenced in folk medicine for supporting circulation and lowering blood pressure. Both the leaves and stems have been used in herbal preparations and as a nutrient-rich food.

Maintenance & harvesting: Mulch around the base in spring to keep the soil moist and suppress weeds. Harvest stems regularly by cutting at the base, which encourages fresh regrowth throughout the season. Every three years, divide mature clumps in spring or early autumn to maintain vigour and prevent overcrowding. Remove spent flower heads if you want to focus the plant’s energy on foliage production, or leave them to feed pollinators. Keep the bed free of competing weeds and water during extended dry spells to ensure consistent growth and flavour.