Kale - Curly Scarlet This variety produces tasty, nutritious leaves when little else is available. It is very winter hardy, and the colour intensifies after first frost. It is an excellent source of both vitamin A and vitamin C. Sow outdoors thinly from April to September, in a seed bed, 1.5cm deep, directly into finely-prepared, well-cultivated, moist, fertile soil. Allow 30cm between rows. Seedlings usually appear in 14-28 days. Thin to 45cm apart. No thinning is necessary if only baby leaves are required. Keep moist. Regular sowings, made every two to three weeks, will ensure a continuous supply. Harvest baby leaves from June. Or sow indoors, from March to May, 0.5cm deep, in a tray of compost. Keep warm and moist. A temperature of 15°C is ideal. Transplant 5cm apart to other trays, when large enough to handle. Gradually accustom young plants to outside conditions before planting out, 45cm apart, during May/June, into well-cultivated, fertile soil. Harvest mature plants from September to March.