Sow mid-April indoors for transplanting. Sow seed, 5cm (2in) deep in 7.5cm (3in) pots or trays of good, free-draining, seed compost. Place in a propagator or seal container inside a polythene bag and keep at 18-21°C (65-70°F) until after germination. Can also be sown May to early July direct outdoors once the soil has warmed, sow 15cm (6in ) apart, 5cm (2in) deep and in rows 45cm (18in) apart.