When to Plant Broccoli in Zone 4
In USDA zone 4, start seeds indoors around March 13, transplant or plant outdoors April 24 to June 28, and expect your first harvest around June 28. Zone 4 also has a fall planting window opening around July 5.
Broccoli planting calendar for USDA Zone 4
spring planting
Start seeds indoors
Mar 13
Transplant outdoors
Apr 24
Projected first harvest
Jun 28
fall planting
Start seeds indoors
May 31
Transplant outdoors
Jul 5
Projected first harvest
Sep 8
spring planting
fall planting
Most broccoli mature in about 50 to 200 days depending on the variety. Dates use USDA zone 4a average frost dates. Set your ZIP in HomeSown for dates tuned to your exact location.
What zone 4 means for broccoli
Average last spring frost
May 15
Average first fall frost
September 20
Those two dates are what set the schedule above. Zone 4 gives you roughly 128 frost-free days, and broccoli need about 50 to 200 days depending on the variety to mature.
Varieties to grow
4 varieties of broccoli in the HomeSown library. Tap any for its full grow guide.
Common problems with broccoli
What to watch for, with identification and treatment for each
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