When to Plant Broccoli in Zone 3
In USDA zone 3a, start seeds indoors around March 28, transplant or plant outdoors May 9 to July 13, and expect your first harvest around July 13. Zone 3 also has a fall planting window opening around June 25. (3a shown here — see 3a and 3b dates separately below.)
Broccoli planting calendar for USDA Zone 3a
Average last spring frost
May 30
Average first fall frost
September 10
spring planting
Start seeds indoors
Mar 28
Transplant outdoors
May 9
Projected first harvest
Jul 13
fall planting
Start seeds indoors
May 21
Transplant outdoors
Jun 25
Projected first harvest
Aug 29
spring planting
fall planting
Most broccoli mature in about 50 to 200 days depending on the variety, needing roughly 103 frost-free days in zone 3a.
Broccoli planting calendar for USDA Zone 3b
Average last spring frost
May 20
Average first fall frost
September 15
spring planting
Start seeds indoors
Mar 18
Transplant outdoors
Apr 29
Projected first harvest
Jul 3
fall planting
Start seeds indoors
May 26
Transplant outdoors
Jun 30
Projected first harvest
Sep 3
spring planting
fall planting
Most broccoli mature in about 50 to 200 days depending on the variety, needing roughly 118 frost-free days in zone 3b.
Not sure whether you're in 3a or 3b? Set your ZIP in HomeSown for dates tuned to your exact location.
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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