- Sow indoors for surest results, February-April, 0.5cm (¼”) deep, in trays of compost. Water well and place in a warm position. A temperature of 15-20°C (60-68°F) is ideal.
- Keep moist. Seedlings usually appear in 14-21 days.
Transplant seedlings, 5cm (2″) apart, to other trays when large enough to handle (always hold by a leaf, never by the stem).
- Grow on in cooler, but not cold conditions. Gradually accustom young plants to outside conditions (avoid frosts), before planting out into well-drained soil, May-June, 25cm (10″) apart, when frosts are over.
- Or, sow outdoors for ease, April-May, where they are to flower, 0.5cm (¼) deep, into finely-prepared, well-drained soil, which has already been watered. Thin seedlings to 25cm (10″) apart. Water well until plants are established.
- Flowers: July-October.