Sow indoors for surest results, March-June, 0.5cm (¼") deep, in a tray of compost. Water well and place in a cold frame, unheated greenhouse, or on a warm kitchen windowsill. Keep moist. Seedlings usually appear in 21-35 days. Transplant, 5cm (2") apart, to other trays when large enough to handle. Always hold seedlings by a leaf, never by the stem. Gradually accustom young plants to outside conditions, before planting out into well-drained soil, September-October, 23cm (9") apart. Or, sow thinly, outdoors, May-June, in a seed bed, 0.5cm (¼) deep, into finely-prepared, well-drained soil, which has already been watered. Thin seedlings to 5cm (2”) apart, before planting out to flowering position in autumn. Flowers: June-September, the following year.
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