Minnesota · zones 3b–5a
When to plant cucumbers in Minnesota.
Sow between May 12 to Jul 15 in a typical year, keyed to Minnesota's median last frost around May 5. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Cucumbers dates for a typical Minnesota season.
Direct sow
May 12 to Jul 15
Keyed to the ~May 5 last frost. Sow 1" deep, 12" apart.
Harvest
~60 days later
~5 lb per plant over ~5 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.
In Minnesota: watch for
The pests that find cucumbers here.
The short season here, about 149 frost-free days, keeps cucumber, slicing in front of squash bugs only briefly. One early row cover usually carries a planting through the worst of it.
Gray shield bugs; leaves wilt and get crispy patches.
Organic fix: Crush the copper egg rows under leaves; diatomaceous earth at the base.
Yellow striped or spotted beetles that spread bacterial wilt.
Organic fix: Row cover until the first female flowers open; neem for heavy runs.
Angular yellow patches bounded by the leaf veins, after wet foliage.
Organic fix: Water in the morning, space for airflow, pull badly infected vines.
White powder coating the leaves late in the season.
Organic fix: Space for airflow, water at the base, spray neem.
Your season math: Minnesota gives cucumbers about 149 frost-free days, and it needs roughly 60 days to a first harvest. That fits about 5 re-sown rounds across the season, so you can keep it coming instead of picking once.
Planting cucumbers in Minnesota: questions
When should I plant cucumbers in Minnesota?+
In a typical Minnesota year, sow cucumbers between May 12 to Jul 15, keyed to the state's median last frost around May 5. Your exact dates shift with your ZIP code and microclimate.
What USDA zone is Minnesota?+
Minnesota spans zones 3b–5a, mostly zone 4. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many cucumbers plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.