Sowing
Spring onions will grow in any good fertile soil provided it is well drained. Sow seeds from March to August at 3 weekly intervals. For an early spring crop sow seeds in September and over winter. Sow liberally 13mm (0.5in) deep in drills 15cm (6in) apart.
No thinning is required. Harvesting can usually start 8 weeks after sowing.