When to Plant Brussels Sprouts in Zone 9
In USDA zone 9a, start seeds indoors around January 11, transplant or plant outdoors February 15 to May 26, and expect your first harvest around May 26. Zone 9 also has a fall planting window opening around September 1. (9a shown here — see 9a and 9b dates separately below.)
Brussels Sprouts planting calendar for USDA Zone 9a
Average last spring frost
March 1
Average first fall frost
December 1
spring planting
Start seeds indoors
Jan 11
Transplant outdoors
Feb 15
Projected first harvest
May 26
fall planting
Start seeds indoors
Jul 28
Transplant outdoors
Sep 1
Projected first harvest
Dec 10
spring planting
fall planting
Brussels Sprouts is ready to harvest in about 100 days, needing roughly 275 frost-free days in zone 9a.
Brussels Sprouts planting calendar for USDA Zone 9b
Average last spring frost
February 15
Average first fall frost
December 15
spring planting
Start seeds indoors
Dec 28
Transplant outdoors
Feb 1
Projected first harvest
May 12
fall planting
Start seeds indoors
Aug 11
Transplant outdoors
Sep 15
Projected first harvest
Dec 24
spring planting
fall planting
Brussels Sprouts is ready to harvest in about 100 days, 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
1 variety of brussels sprouts in the HomeSown library. Tap any for its full grow guide.
Common problems with brussels sprouts
What to watch for, with identification and treatment for each
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