When to Plant Cauliflower in Zone 3
In USDA zone 3a, start seeds indoors around April 18, transplant or plant outdoors May 16 to August 9, and expect your first harvest around August 9. Zone 3 also has a fall planting window opening around June 4. (3a shown here — see 3a and 3b dates separately below.)
Cauliflower planting calendar for USDA Zone 3a
Average last spring frost
May 30
Average first fall frost
September 10
spring planting
Start seeds indoors
Apr 18
Transplant outdoors
May 16
Projected first harvest
Aug 9
fall planting
Start seeds indoors
Apr 30
Transplant outdoors
Jun 4
Projected first harvest
Aug 28
spring planting
fall planting
Most cauliflower mature in about 70 to 200 days depending on the variety, needing roughly 103 frost-free days in zone 3a.
Cauliflower planting calendar for USDA Zone 3b
Average last spring frost
May 20
Average first fall frost
September 15
spring planting
Start seeds indoors
Apr 8
Transplant outdoors
May 6
Projected first harvest
Jul 30
fall planting
Start seeds indoors
May 5
Transplant outdoors
Jun 9
Projected first harvest
Sep 2
spring planting
fall planting
Most cauliflower mature in about 70 to 200 days depending on the variety, needing roughly 118 frost-free days in zone 3b.
Not sure whether you're in 3a or 3b? Set your ZIP in HomeSown for dates tuned to your exact location.
Varieties to grow
4 varieties of cauliflower in the HomeSown library. Tap any for its full grow guide.
Common problems with cauliflower
What to watch for, with identification and treatment for each
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