Request a Catalog   |   Quick Order   |    E-mail Signup   |   1-877-564-6697
My Account   |   Wish List     Johnny's Selected Seeds Login
Package of Johnny's Selected Seeds
Package of Johnny's Selected Seeds
SALE! Season Extension Supplies FREE STANDARD SHIPPING On Orders Over $200!*
 E-mail Signup

Disease Resistance:

No disease information found.

Symbols Explained

Organic Seeds, Plants, and Supplies

Organic Seeds, Plants, and Supplies

Plants, or seeds harvested from plants, that have been grown without synthetic fertilizers or pesticides, strictly adhering to the USDA's National Organic Standards Board (NOSB) organic gardening practices are designated as Organic.

For supplies, such as fertilizers and pest and disease controls, the OG symbol identifies products that meet the USDA's National Organic Program (NOP) rules according to a third-party authority such as OMRI, WSDA, and/or a local authority such as MOFGA or NOFA.


KossakOrganic (F1) Kohlrabi Seed


Product ID: 237G

Giant kohlrabi for storage.

Kossack will reach a diameter of up to 8", and the interior will still be sweet, delicious, and tender. Peel the woody "skin" prior to cooking. Will keep in cold storage for several months. For best quality and storage, harvest when round and about 8" diameter, before it begins to elongate. Kossack can be stored for up to 4 months. Organically grown. Avg. 6,000 seeds/oz. Packet: 100 seeds.

Product Price Qty
237GPacket  $7.10 
237G250 Seeds  $15.90 
237G1,000 Seeds  $50.95 
237G5,000 Seeds  $222.80 
237G25,000 Seeds  $978.25 
237G50,000 Seeds  $1,831.00 

Quick Facts

Days to Maturity or Bloom:   80

Plant Cycle:   (A)  

Product Symbols:

Organic Seeds, Plants, and Supplies  

Shipping Information & Notes

Growing Information


CULTURE: Kohlrabi prefers mild or cool weather. It is grown throughout the season in the North, and during fall and winter in the South. Sow 15 seeds/ft., 1/4- 1/2" deep, in rows 12-18" apart. Thin fresh market varieties to 4" between plants. Thin storage varieties such as 'Kossak' to 10" between plants. For earliest crops start in flats or plug trays and transplant. Fertile, well-irrigated soil promotes rapid growth which makes for a sweeter flavored crop. Harvest when roots are about 2" diameter.
From direct seeding; subtract about 14 days if transplanting.
We only stock seed lots that have been tested free of black rot in a sample of 30,000 seeds.
250 seeds sows 16', 1,000 seeds sows 66', 436,000/acre at 15 seeds/ft with rows 18" apart.
Avg. 4,500 plants/oz., 800 plants/1,000 seeds.
Standard except where noted.
SEEDS/OZ.: 5,500-7,100 (avg. 6,300).
100 seeds sows 8'.

Recently Viewed


Choose Your Shipping Date

Please enter your zip code or select a hardiness zone from the menu below to view the recommended shipping date.

You may also manually select a ship date below.

Ship Date:
Want to change your ship date? Click on the drop down box and choose a different date.

Plant Shipping


Would you like to ship these plants together? Yes No

Incompatable lead time. Please select a new date for both items.

Johnny's Selected Seeds Email Contest Gift Certificate Give Away
Johnny's Farm Crew
Thank you for signing up for growing tips, exclusive offers, and new product info. Close