Dahlia - Pompon Mixed This is a cut flower favourite producing double pompon 'honeycomb' heads. This half hardy perennial should be treated as an annual and reaches the height of 90cm. Sow indoors, from February to April. A warm kitchen windowsill is all you need for starting these seeds. Sow, 0.5cm deep, in trays of compost. Water well and place in a warm position. A temperature of 15-20°C is ideal. Keep moist. Seedlings usually appear in 14-28 days. Transplant them, 5cm apart, to further 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, before planting out, from May to June, 45cm apart, into well-drained soil, when frosts are over. Flowers from July to October. Remove dead heads to prolong flowering season.
