Wisconsin · zones 4a–5b
When to plant cucumbers in Wisconsin.
Sow between May 12 to Aug 11 in a typical year, keyed to Wisconsin's median last frost around May 5. A second, fall sowing fits Jun 2 to Jul 3. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Cucumbers dates for a typical Wisconsin season.
Direct sow
May 12 to Aug 11
Keyed to the ~May 5 last frost. Sow 1" deep, 12" apart.
Fall round
Jun 2 to Jul 3
Counted back from the ~Oct 3 first frost.
Harvest
~60 days later
~5 lb per plant over ~5 weeks.
Wisconsin spans more than one climate: Zone 5 is the most common zone, but the state runs 4a to 5b. 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.