Purple Vienna Kohlrabi Guide
Kohlrabi grows best in weather ranging between 45°F-75°F. They do great in bigger containers and small gardens. Bank on Seeds recommends transplanting.
If Direct Seeding
- Direct seed outside a week or two before the last frost date; or
- Direct seed into a container 16-18 inches deep and wide anytime of the year. It can be placed outside when the temperature is between 45°F-75°F; or
Begin the growing season early and start the kohlrabi seeds indoors in trays or pods 4 weeks before the last frost date. Germination is best and fastest between 60°F-70°F. It can be transplanted outside 4 weeks later.
Sow seeds 1/4 inch deep and 4 inches apart with rows spaced 18-24 inches apart. Germination will take 14-21 days.
Purple Vienna kohlrabi likes well-draining soil with lots of organic matter. They also like full sun and regular watering. Keep the soil evenly moist and do not let it dry out fully. Check the top 2-3 inches of soil and if it is dry, then water it.
Apply mulch to the top of soil to retain moisture, regulate temperature and deter weeds. Use aged compost, aged manure or 10-10-10 fertilizer every 3-4 weeks.
Days to maturity take 55 days. Harvest the kohlrabi globes by cutting them when they are 2-3 inches in diameter – any bigger would make the taste bitter and woody. Their leaves can also be harvested as needed and used like any other greens.
Aphids, cabbage moths, cabbage looper - handpick, companion plant or spray with pesticide containing Bacillus thuringiensis (Bt), plant collar or row cover
*Plant Purple Vienna kohlrabi with beets, cucumbers, lettuce, onions and bush beans. Avoid planting with other brassica family members and tomatoes.*