Soak the seeds during 48 hours in water. Sow indoors from mid January till mid October at 25°C, in a seedtray. Keep soil moist by spraying water with a plant spray and over the tray with clingfilm to prevent the soil from drying out. Remove the clingfilm when the first shoots appear. As soon as the height of the plants is 5-6 cm, you need to transplant them into flowerpots.