Sow in pots on a windowsill or in a greenhouse at approximate 15 to 20 degree Celsius in a good quality finely sieved firmed moist compost at a depth of 6mm and cover to exclude light(Germination 7 to 30 days) Transplant seedlings spacing them out 5cm apart in seed trays and grow on Plant out 30cm apart into flowering positions in May or June