Using a quality, moist seed compost, sow your seeds thinly in a propagator and cover with 3mm (1⁄8") compost. Place on a windowsill or in a greenhouse at approximately 18-21°C (65-70°F) to germinate (14-28 days). Transfer seedlings into trays spacing them 5cm (2") apart, and grow on. Plant out in a sunny spot 25cm (10") apart. Alternatively, sow thinly direct outside.