Huge but crisp. This large, white-skinned hybrid will definitely inspire your tastebuds whether used in coleslaw, sliced fresh on a veggie tray or cooked in soups and stews. As it continues to grow it will remain tender without getting pithy or hollow. Kossak also has excellent storage capabilities and is easy to grow as an early or late planting. Maturity in 65-70 days. Approx. 50 seeds/pkg.
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Sow seed 1/4-1/2" deep early in the spring once the soil has warmed to 10-18°C (50-65°F). Thin plants to 4" apart in rows spaced 12-18" apart.
Choose an area with full sun and soil pH of 6.0-7.0. Enrich the soil with compost or well rotted manure. Kohlrabi benefits from additional feedings of liquid fertilizer during the growing season.
For fresh use, pull plants when the stem has swollen to 2" in diameter. For storage, allow the stems to grow up to 4-5" in diameter. Clean or trim leaves. Kohlrabi stores well in the fridge or cold room.
Pests & Diseases:
Cabbage worms and loopers (white and yellow butterflies) can be controlled using BTK, Rotenone or Pyrethrum. Use row covers to block out all insects including root maggots, aphids and Diamondback moths. Maintaining a soil pH of 6.8 and higher will discourage club root. Fungal and bacteria diseases such as head rot and downy mildew can be prevented by allowing good air circulation and avoiding a mid August maturity when the air humidity is higher. Strong healthy plants growing in an organically rich soil will be better able to fight disease.