Sow February onwards for greenhouse growing or in April for planting outside late May/June. Place seed on the surface of a good free draining, damp seed compost and cover with a fine sprinkling of compost or vermiculite. Place in a propagator at a constant temperature of around 18-20Â°C (64-68Â°F) until after germination, which takes 7-14 days.
Transplant seedlings when large enough to handle into 7.5cm (3in) pots. Plant in final situation when 20cm (8in) high, 45cm (18in) apart. Remove sideshoots regularly. Plants will require support.