When to Plant Broccoli in Zone 3
In USDA zone 3, 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.
Broccoli planting calendar for USDA Zone 3
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. Dates use USDA zone 3a average frost dates. Set your ZIP in HomeSown for dates tuned to your exact location.
What zone 3 means for broccoli
Average last spring frost
May 30
Average first fall frost
September 10
Those two dates are what set the schedule above. Zone 3 gives you roughly 103 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
🌱 Grow broccoli with a calendar built for your exact yard
HomeSown turns your ZIP code into a personalized planting calendar, watering reminders, and pest help. Free to start.
Start your free garden →