Fill a seed tray or pots with good, free-draining, seed compost. Sow seed on the surface of the compost and apply a fine sprinkling of compost or vermiculite. Place in a propagator or seal container inside a polythene bag and keep at 20-25°C (68-77°F) until after germination which takes up to 21 days. Keep compost moist, water seedlings lightly on emergence. Do not exclude light.