Sow seeds thinly into a seed bed or trays of compost. Just cover the small seed. Keep moist. Thin, prick out or pot on as necessary, giving each plant room to develop. Transplant to flowering position in the autumn. Mulch plants well for winter protection. Thinly in trays of compost. Just cover the seeds with compost and keep moist and warm at about 20C (68F). Thin (prick out) to other trays when seedlings have developed 2-4 leaves. Harden off and plant outside, spacing 45-60cm (18-24in) apart.