Minnesota · zones 3b–5a
When to plant broccoli in Minnesota.
Sow or transplant between Mar 14 to Apr 11 in a typical year, keyed to Minnesota's median last frost around May 5. A second, fall sowing fits Jun 17 to Jul 27. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Broccoli dates for a typical Minnesota season.
1 · Start indoors
Jan 31 to Feb 28
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
Mar 14 to Apr 11
Keyed to the ~May 5 last frost. Sow 0.5" deep, 18" apart.
Fall round
Jun 17 to Jul 27
Counted back from the ~Oct 1 first frost.
Harvest
~60 days later
~1.2 lb per plant over ~3 weeks.
Minnesota spans more than one climate: Zone 4 is the most common zone, but the state runs 3b to 5a. That's why the planner works from your ZIP code's frost dates, not your zone — mountain and coastal gardens in the same state can be three weeks apart.