When to Plant Kohlrabi in Zone 4
In USDA zone 4a, start seeds indoors around March 27, transplant or plant outdoors May 1 to June 25, and expect your first harvest around June 25. Zone 4 also has a fall planting window opening around July 12. (4a shown here — see 4a and 4b dates separately below.)
Kohlrabi planting calendar for USDA Zone 4a
Average last spring frost
May 15
Average first fall frost
September 20
spring planting
Start seeds indoors
Mar 27
Transplant outdoors
May 1
Projected first harvest
Jun 25
fall planting
Direct sow
Jul 12
Projected first harvest
Sep 5
spring planting
fall planting
Kohlrabi is ready to harvest in about 55 days, needing roughly 128 frost-free days in zone 4a.
Kohlrabi planting calendar for USDA Zone 4b
Average last spring frost
May 10
Average first fall frost
September 25
spring planting
Start seeds indoors
Mar 22
Transplant outdoors
Apr 26
Projected first harvest
Jun 20
fall planting
Direct sow
Jul 17
Projected first harvest
Sep 10
spring planting
fall planting
Kohlrabi is ready to harvest in about 55 days, needing roughly 138 frost-free days in zone 4b.
Not sure whether you're in 4a or 4b? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
1 variety of kohlrabi in the HomeSown library. Tap any for its full grow guide.
Common problems with kohlrabi
What to watch for, with identification and treatment for each
🌱 Grow kohlrabi with a calendar built for your exact yard
HomeSown turns your ZIP code into a personalized planting calendar, watering reminders, and pest help. Free to start.
Start your free garden →