For first year flowering sow February in a propagator on a windowsill or in a greenhouse at approximately 18-21°C (65-70°F) using a good quality, moist compost. Cover the seeds lightly with sieved compost as light assists germination. Germination 10-14 days. Transfer seedlings, spaced out, into trays and grow on. Acclimatise plants gradually before planting out in May 20cm (8") apart in a sunny position. Alternatively sow direct outside March-July in a coldframe planting out in September for flowering in the second year.