A cut flower favourite giving a high percentage of double pompon ‘honeycomb’ heads.
Sow indoors, February-April. A warm kitchen windowsill is all you need for starting these seeds. Sow, 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 14-28 days. Transplant them, 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, May-June, 30cm (1′) apart, into well-drained soil, when frosts are over. Flowers: July-October.
Tip: After frost blackens plants, lift tubers, allow to dry, then store frost-free. Replant the following spring, for further summer displays.