When to Plant Cauliflower in Zone 9
In USDA zone 9a, start seeds indoors around January 18, transplant or plant outdoors February 15 to May 11, and expect your first harvest around May 11. Zone 9 also has a fall planting window opening around August 25. (9a shown here — see 9a and 9b dates separately below.)
Cauliflower planting calendar for USDA Zone 9a
Average last spring frost
March 1
Average first fall frost
December 1
spring planting
Start seeds indoors
Jan 18
Transplant outdoors
Feb 15
Projected first harvest
May 11
fall planting
Start seeds indoors
Jul 21
Transplant outdoors
Aug 25
Projected first harvest
Nov 18
spring planting
fall planting
Most cauliflower mature in about 70 to 200 days depending on the variety, needing roughly 275 frost-free days in zone 9a.
Cauliflower planting calendar for USDA Zone 9b
Average last spring frost
February 15
Average first fall frost
December 15
spring planting
Start seeds indoors
Jan 4
Transplant outdoors
Feb 1
Projected first harvest
Apr 27
fall planting
Start seeds indoors
Aug 4
Transplant outdoors
Sep 8
Projected first harvest
Dec 2
spring planting
fall planting
Most cauliflower mature in about 70 to 200 days depending on the variety, needing roughly 303 frost-free days in zone 9b.
Not sure whether you're in 9a or 9b? 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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