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Kossack Kohlrabi (F1 Hybrid, 60 Days)

This giant kohlrabi can reach the size of a bowling ball, & still remain quite tender. Skin is light green with white sweet flesh. Leaves can be eaten like collard greens. Will store a month or more in the refrigerator or root cellar. 

40 seeds


Brassica oleracea var. gongylodes

Germination: 7-10 days

Germination Temperature: Optimum soil temperatures 60-75ºF. 

Seed Sowing Depth: 1/4" deep

Sowing Outdoors: Starting in spring when soil temperature reaches 60 ºF. Sow seeds 1-2" apart, thin 3-8” apart. The larger the bulb size the more space. Sow in mid to late summer for fall harvest.

How much does a packet plant: 4-6 foot single row

Harvest: Bulbs from spring plantings under 2-3” for the most tender and sweet bulbs. Fall plantings can survive frosts and can be harvested when they are larger.

Tips: Plant in fertile soil, amend with compost before planting if needed. Grows best in the cooler weather of spring and late summer. Summer heat makes the bulbs woody and dry. Adequate moisture is needed for optimum growth. 

Customer Reviews

Based on 9 reviews Write a review
Customer Reviews
4.8 Based on 5 Reviews
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Paula H.
United States United States
I recommend this product
Kossack Kohlrabi

Great delivery time of seed pkgs. Started seeds indoors, all seeds germinated. Had trouble germinating seeds directly planted outdoors but could have been a result of the weather. Kohlrabi doing well from the transplanted indoor seedlings. Have harvested a few already. Large and not grainy. Tastes great.

James R.
United States United States
I recommend this product
My favorite kohlrabi

Pine tree came thru when the bigger seed companies didn’t. Germination >90%. Six weeks after transplanting with freezing to 90 degree temp swings, the first-fruits are ready

Martin S.
United States United States
I recommend this product
excellent Kohlrabi

Quick shipping and excellent germination

Pinetree Garden Seeds Kossack Kohlrabi (F1 Hybrid, 60 Days) ReviewPinetree Garden Seeds Kossack Kohlrabi (F1 Hybrid, 60 Days) Review

If you are new to kohlrabi, choose Kossak! Other 'early' kohlrabi get hard and woody if you wait too long, so if you're growing this for the the first time, I recommend this variety to give yourself some leeway. If you can't grow cabbage in your area, this is the next best thing!

good stuff

best flavor and texture no matter the growing conditions, sometimes takes a little longer to get huge.