When to grow:
Red cabbages are normally sown February to mid April for transplanting from April to early June and cropping between August and November.
Sow outdoors thinly in a seed bed in March, 1.5cm(½in) deep directly into finely prepared soil which has already been watered. Seedlings usually appear in 14-21 days. Water well until plants are established. Transplant 30cm(1ft) apart when plants are about 10cm(4in) tall. Allow 30cm(1ft) between rows. Plant firmly and water well.
You can also sow indoors 0.5cm(¼in) deep, in a tray of compost. Water well and place in a cold frame or unheated greenhouse. Keep moist. Transplant 5cm(2in) apart to other trays when large enough to handle. Gradually accustom young plants to outside conditions (avoid frosts), before planting out.