Sow seeds January to April. Germinate at 20-25C (68-77F) on the surface of a good free draining, damp seed compost. Do not cover the seeds. Place in a propagator or seal container inside a polythene bag until after germination which usually takes 14-21 days. Do not exclude light, as this helps germination.
Transplant seedlings when large enough to handle into trays or 7.5cm (3in) pots. Grow on in cooler conditions for 10-15 days before planting out after all risk of frost, 30cm (12in) apart or plant direct into baskets or containers.