Sowing – Sow February to April in pots or trays of moist seed compost and cover with a very fine sprinkling of compost or vermiculite. Place in a propagator or warm place, and keep at a constant temperature of between 15-20°C (59-68°F). After sowing, do not exclude light as this helps germination. Keep the surface of the compost moist but not waterlogged; germination can take 1-4 months.

Growing – When large enough to handle, transplant seedlings into 7.5cm (3 inch) pots or trays. Gradually acclimatise to outdoor conditions for 10-15 days before planting out after all risk of frost, 30cm (12in) apart.

Flowers – June to September