From late winter to mid-spring, sow shallowly in trays or pots of good quality seed compost and keep keep moist but not overly wet. Germination usually takes between 2 and 4 weeks. Seedlings can be transplanted to small pots or cells and then hardened off and planted outside after all risk of frost has passed. Alternatively, sow directly into a well-prepared bed in late spring and when large enough to handle, thin out to allow 25cm between each plant. Once established, regular picking will help encourage new growth to form.