Sow from May to July for flowering plants in May the following year. Using a 286 plug tray or slightly larger sized unit, sow on to the surface of a moist well drained seed sowing compost lightly cover the seed with vermiculite and propagate at 18C. Temperatures higher than 25C will reduce the rate of germination considerably. Germination should take place after 2 weeks.
Grow on the seedlings in a lightly shaded area until they are established and fill the tray. Pot on in late August - September in to 1 litre pots or put 3 plugs in to 2 or 3 litre pots. Over winter in a well ventilated unheated glasshouse or tunnel for sales the following March / April or for flowering plants ready to sell in early May to June.