Roter Grunkohl purple kale, also known as Ruvio, is a variety with very curly green leaves and dark purple stems. This kale develops its typical flavor and increases its vitamin C content after exposure to frost.

Successful sowing

Sow seeds 0.5 cm deep from May to mid-July, in a nursery bed 1 cm deep. Do not compact the soil to allow the seedlings to reach the light more easily.
To germinate, kale seeds require a temperature between 7°C and 20°C for about 10 days.

Planting kale

Transplant in place when the plants have 4 leaves, at a distance of 80 cm in all directions, in fertile, deep, fresh and humus-rich soil, in a sunny location.
Mulching and watering at the base is recommended. Protect with a winter fleece if severe frost is expected.

Kale thrives in rich, clayey soils, but can grow in most soils as long as they remain moist.

Harvest

Kale leaves are harvested from October to mid-February, as frost makes the leaves more tender.

The enemies

Slugs : Set up slug barriers around crops.

White butterfly : spray with tansy decoctions or install an insect net.