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Kossak Hybrid Kohlrabi Seeds
★ Best Seller Non-GMO

Kossak Hybrid Kohlrabi

$4.50 Packet - 25 to 30 Seeds
Mix ’n Match: buy 20+ eligible packets and pay just $3.75 each

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Packet Size
Flat $7.99 shipping Germination guaranteed Non-GMO
Not sure when to plant in your area? Planting dates depend on your local frost dates and growing zone.
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Quick Facts
Days to Maturity65 days
SunlightFull Sun
Spacing4 - 6 Inches
Germination3–10 days
Growing Information

Growing Kossak Hybrid Kohlrabi

‘Kossak’ is a standout hybrid kohlrabi known for producing impressively large bulbs without sacrificing tenderness or flavor. The smooth, light green bulbs develop crisp, sweet white flesh that stays tender and avoids becoming pithy, even as the bulbs size up.

Sow ‘Kossak’ directly in the garden about ¼ inch deep. Space plants 4 to 6 inches apart and grow in full sun. This cold-tolerant variety performs well in cool-season gardens and is also a good choice for containers.

Ready to harvest in about 65 days, the bulbs can be picked once they reach full size and feel firm.

Sweet, crisp, and versatile, ‘Kossak’ is delicious raw, roasted, sautéed, or baked into casseroles. It also stores exceptionally well, keeping for up to four months under proper conditions.

  • Days to Maturity: 65
  • Sow Method: Direct Sow
  • Sow Depth: ¼ Inch
  • Spacing: 4 - 6 Inches
  • Sun: Full Sun
  • Height: 12 - 18 Inches
  • Fruit Weight: 10 Lbs
  • Fruit Size: 10 Inches
Catalog Page: 41
How to start

Direct Sow

Sowing depth

¼ Inch

Plant height

12 - 18 Inches

Botanical name

Brassica oleracea Gongylodes Group

Questions

FAQ

How should I start these seeds?
Recommended sow method: Direct Sow.
How deep should I sow the seeds?
Sow at a depth of ¼ Inch.
How long until they germinate?
Typical germination: 3–10 days.
How far apart should I space them?
Recommended spacing: 4 - 6 Inches.
How much sun do they need?
Recommended sun exposure: Full Sun.
What’s your germination guarantee?
We stand behind the germination quality of our seed. If you have a germination issue, contact our team and we'll help make it right.
REAL GARDENERS, REAL RESULTS

What Gardeners Are Saying

Customer Reviews

Based on 4 reviews
75%
(3)
0%
(0)
25%
(1)
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(0)
0%
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L
Louise Neuenschwander
Kossak Seeds

I was disappointed this year with the germination of the seeds. They did not come well for me. I reordered seeds to plant again and the same thing happened. Not sure what happened.

Hi Louise,
We’re sorry to hear that your experience didn’t meet expectations, and we truly appreciate your feedback. We’ve reached out to you directly to better understand the issue and work toward a resolution.
Customer satisfaction is very important to us, and we’re committed to making things right. Thank you for giving us the chance to improve. We look forward to connecting with you soon!
—The Seeds 'n Such Team

A
Alan Mader
Great Kohlrabi

I have planted this variety for years and have never been disappointed. While some are picked on the smaller size, towards the end of the year they get pretty big. Nonetheless, they remain tender at either end of the spectrum.

S
Steph Lindsay
Held a LOOONG time

I sowed seeds for these in January 2022 and planted them out in a place that was too shady. I saw them grow slowly and finally start to bulb up when sunlight reached their spot in the mornings and evenings. Then life went sideways and they were ignored until they were a year old! Now they are football shaped with a little tuft of leaves at the top. I picked one and tried it, expecting it to be bitter, woody, maybe even hollow, and inedible. But it is not! It is not super sweet but it is not bitter at all either! We sliced it thin and ate it up with hummus. If it is this good with such long neglect, I can't wait to see what they taste like when planted in a better spot and picked on time! I'm in a Mediterranean-type Zone 9.

J
Joe Olmstead
HUGE

The itty bitty seeds develop into huge plants. But, don't let the large size fool you, these are the sweetest kohlrabi I have ever eaten. Goes great in a mixed greens salad with your favorite dressing. I have yet to try some cooked, but I have faith that they will still taste great. They are also fast growers and I can get two crops in a year here in Tennessee.