Red Cabbage

Red cabbage is a dense, compact brassica forming tight round or pointed heads with deep violet-red leaves. It is hardy and tolerates light frost well, making it well suited to Nordic growing conditions. Heads typically weigh 1–1.5 kg and hold well in the field without splitting. It thrives in full sun with consistent moisture and nutrient-rich soil.

Growing

Start seeds indoors or in a cold frame, sowing 1 cm deep into trays or modules, 4–6 weeks before planned transplanting. Germination is best just above 20 °C. Once seedlings emerge, move them to a bright, cool, and airy position — keep above 14 °C to reduce bolting risk. Harden off gradually before transplanting outdoors once frost risk has passed; a brief light frost is tolerable. Plant out at 35–40 cm within the row and 50–70 cm between rows, setting the transplant slightly deeper than it grew in the tray to discourage cabbage root fly.

Care

Water consistently, especially during head formation, to prevent splitting. Feed with a nitrogen-rich fertiliser during vegetative growth, then switch to potassium-focused feeding as heads develop. Keep beds free of competing weeds, particularly in early growth. Use fine-mesh netting to protect against cabbage white butterfly and root fly. Avoid temperatures below 14 °C for extended periods during early growth as this promotes premature bolting.

Harvest

Harvest when heads are firm and compact throughout — press the top firmly; a solid, unyielding head is ready. Cut the stem cleanly at the base with a sharp knife. Plants can stand in the field for an extended period without deteriorating, and late-harvested heads store particularly well. Heads sown and harvested late keep longest in storage.

In the kitchen

Red cabbage is excellent raw in coleslaw, finely shredded salads, and as a crunchy garnish. It works equally well cooked: braise slowly with apple and spices, grill in wedges, stir into soups and stews, or ferment as sauerkraut and pickles. The vivid colour brightens any dish and intensifies when pickled with vinegar.

Storing

Store whole heads in a cool, humid cellar or refrigerator at 0–4 °C; they keep for 3–5 months under good conditions. Cut heads should be wrapped tightly and used within a week. Shredded red cabbage can be lacto-fermented or pickled in vinegar for long-term preservation at room temperature. It also freezes well after blanching.