North Dakota · zones 4a–4a
When to plant bell peppers in North Dakota.
Sow or transplant between May 31 to Jul 22 in a typical year, keyed to North Dakota's median last frost around May 15. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Bell Peppers dates for a typical North Dakota season.
1 · Start indoors
Apr 19 to Jun 10
About 6 weeks before set-out. Warm spot, real light.
2 · Set out
May 31 to Jul 22
Keyed to the ~May 15 last frost. Sow 0.25" deep, 18" apart.
Harvest
~70 days later
~4 lb per plant over ~8 weeks.
North Dakota spans more than one climate: Zone 4 is the most common zone, but the state runs 4a to 4a. 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.