When to Plant Brussels Sprouts in Zone 4
In USDA zone 4a, start seeds indoors around March 27, transplant or plant outdoors May 1 to August 9, and expect your first harvest around August 9. Zone 4 also has a fall planting window opening around June 21. (4a shown here — see 4a and 4b dates separately below.)
Brussels Sprouts 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
Aug 9
fall planting
Start seeds indoors
May 17
Transplant outdoors
Jun 21
Projected first harvest
Sep 29
spring planting
fall planting
Brussels Sprouts is ready to harvest in about 100 days, needing roughly 128 frost-free days in zone 4a.
Brussels Sprouts 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
Aug 4
fall planting
Start seeds indoors
May 22
Transplant outdoors
Jun 26
Projected first harvest
Oct 4
spring planting
fall planting
Brussels Sprouts is ready to harvest in about 100 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 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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