When to Plant Brussels Sprouts in Illinois
Illinois spans USDA hardiness 5a to 7a (zones 5a to 7a on this page). Plant brussels sprouts by your local frost date, not the calendar — pick your zone below for exact start-indoors, transplant, and harvest dates.
Jump to: Zone 5a · Zone 5b · Zone 6a · Zone 6b · Zone 7a
Brussels Sprouts planting calendar for Illinois, Zone 5a
Average last spring frost
May 5
Average first fall frost
October 1
spring planting
Start seeds indoors
Mar 17
Transplant outdoors
Apr 21
Projected first harvest
Jul 30
fall planting
Start seeds indoors
May 28
Transplant outdoors
Jul 2
Projected first harvest
Oct 10
spring planting
fall planting
Brussels Sprouts is ready to harvest in about 100 days. Full zone 5 guide (both 5a and 5b) →
Brussels Sprouts planting calendar for Illinois, Zone 5b
Average last spring frost
April 30
Average first fall frost
October 5
spring planting
Start seeds indoors
Mar 12
Transplant outdoors
Apr 16
Projected first harvest
Jul 25
fall planting
Start seeds indoors
Jun 1
Transplant outdoors
Jul 6
Projected first harvest
Oct 14
spring planting
fall planting
Brussels Sprouts is ready to harvest in about 100 days. Full zone 5 guide (both 5a and 5b) →
Brussels Sprouts planting calendar for Illinois, Zone 6a
Average last spring frost
April 25
Average first fall frost
October 10
spring planting
Start seeds indoors
Mar 7
Transplant outdoors
Apr 11
Projected first harvest
Jul 20
fall planting
Start seeds indoors
Jun 6
Transplant outdoors
Jul 11
Projected first harvest
Oct 19
spring planting
fall planting
Brussels Sprouts is ready to harvest in about 100 days. Full zone 6 guide (both 6a and 6b) →
Brussels Sprouts planting calendar for Illinois, Zone 6b
Average last spring frost
April 20
Average first fall frost
October 15
spring planting
Start seeds indoors
Mar 2
Transplant outdoors
Apr 6
Projected first harvest
Jul 15
fall planting
Start seeds indoors
Jun 11
Transplant outdoors
Jul 16
Projected first harvest
Oct 24
spring planting
fall planting
Brussels Sprouts is ready to harvest in about 100 days. Full zone 6 guide (both 6a and 6b) →
Brussels Sprouts planting calendar for Illinois, Zone 7a
Average last spring frost
April 15
Average first fall frost
October 20
spring planting
Start seeds indoors
Feb 25
Transplant outdoors
Apr 1
Projected first harvest
Jul 10
fall planting
Start seeds indoors
Jun 16
Transplant outdoors
Jul 21
Projected first harvest
Oct 29
spring planting
fall planting
Brussels Sprouts is ready to harvest in about 100 days. Full zone 7 guide (both 7a and 7b) →
Not sure which half-zone you're in? 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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