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Grand Duke Kohlrabi (F1 Hybrid 50 Days)

5 reviews

1979 All America selection winner and still a favorite for both earliness and flavor. Kohlrabi is also called cabbage-turnip and appropriately so, the turnip-like balls are held cleanly above the ground with a cruciferous, “cabbagey” flavor. 4” globes are crisp and tender and Grand Duke holds well, meaning that you can leave it in the garden for a while without it becoming woody. 

40 seeds

Grand Duke Kohlrabi (F1 Hybrid 50 Days)


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 the 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. 


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Customer Reviews
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ann j.
United States United States
I recommend this product
Thumbs up

Great used the tops and bottoms, bottoms were huge. Mixed tops with turnips, kale, spinach and Swiss chard, mixed bottoms with mix, great meal, easy to grow, will order again.

Jean W.
United States
I recommend this product
Grand Duke Kohlrabi

I grew these last year and they were great, so I ordered the same seed this year.

United States
fast growing!!

It germinated very fast. I planted it outside in the garden. Now it already has a bulb.. Looking forward to sample it after is fully grown.

Steven G.
United States
Grand Duke kohlrabi

The grand do did not germinate both packages but the red highbred did so far only satisfied with the red highbred

Pinetree Garden Seeds

Hi Steven - I'm sorry to hear that your Grand Duke Kohlrabi did not germinate for you. We do guarantee the germination of our seeds. We will contact you via email. Thanks, Pinetree Garden Seeds

Dave S.
Indianapolis, IN

Last year was the first year I grew GRAND DUKE KOHLRABI. I have grown several other varieties in the past. The GRAND DUKE KOHLRABI's are the best they were huge, hardy, fast growing and delicious. Don't waste your time growing anything else. I grow them from seeds in my basement like tomatoes, peppers and cabbage. I recommend this variety I believe it is a former AAS Winner. I am growing this variety again this year.