Sow the seeds thinly in a propagator on a windowsill or in a greenhouse at approximately 15-20°C (60-68°F) pressing the seed gently onto a good quality, finely sieved, moist compost. Do not exclude light or allow to dry out. Germination normally takes 10-14 days. Transplant seedlings, spacing them 5cm (2") apart in trays and grow on. Plant out after carefully acclimatising the plants to outside conditions 36cm (14") apart.