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White Vienna Kohlrabi Guide

Without a doubt one of the oddest looking vegetables out there but packed full of antioxidants, fiber and vitamin C! White Vienna  is an heirloom early variety and is cold hardy and slow to bolt allowing for a longer harvesting season. As usual, these bulbs roasted thinly sliced with oil and garlic make for a delicious snack. The bulbs are best when picked around 3” in diameter.


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

If Transplanting

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.


White 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 White Vienna kohlrabi with beets, cucumbers, lettuce, onions and bush beans. Avoid planting with other brassica family members and tomatoes.*

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