Sow seeds from mid April to May. Sow seeds 4cm (1 1/2in) deep in 7.5cm (3in) pots of free draining compost. Place in a propagator or seal container inside a polythene bag and place at 18-20C (64-68F) until after germination which takes 7-10 days. Do not exclude light, as this helps germination.Seeds can also be sown direct outdoors once the soil has warmed, sow 2 seeds 5cm (2in) deep, 15cm (6in) apart, and in rows 45cm (18in) apart. Thin out to the strongest seedling when well grown.
Gradually acclimatise to outdoor conditions for 7-10 days before planting out after all risk of frost has passed.