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Red cabbage – (Brassica oleracea convar. capitata var. rubra) is sown in late February, early March in a cold frame; harvest in early fall. Plant raised plants in open ground no later than May. Provide adequate space between plants, for example, 70 x 70 cm per cabbage. Red cabbage is – like other cabbages – a major consumer of nitrogen, so make sure to fertilize adequately. Cabbage likes heavy soil because it retains moisture better and is rich in minerals.
Keep plants weed-free and water regularly. With its firm and colored leaves, red cabbage seems to suffer less from the pests that other brassicas suffer so much from.
Fungi & diseases
Poor growth, plant wilting, swollen roots rotting away: Clubroot (Plasmodiophora brassicae).