Place the seeds in a heat proof container and pour hot water 70-80 degrees Celsius over them and leave them to soak for between 12-24 hours. Seeds that have been successfully pretreated will have swollen to around 3 times their previous size. Remove all swollen seeds as these will be damaged by further pretreatments. These can be sown immediately. This hot water treatment can be repeated up to 3 times, making the water a little hotter each time. Seeds that remain small need to be dried for further treatmen Sow the seeds individually in pots filled with good quality compost at a depth of about 1 cm (just less than ½ an inch) and the plants will appear very quickly if they are kept in warm temperatures. Keep plants weed free and well watered in a warm, sunny position. Growth in the first year can exceed 60cm and large seedlings can be planted in their permanent positions during the dormant season. Smaller seedlings may need another year of growth.