When to plant summer squash in zone 3b
A planting schedule for summer squash in USDA hardiness zone 3b, where the typical last spring frost is around May 17, 2026 and the first fall frost around Sep 26, 2026. Dates are computed from NOAA frost normals for a representative location (Hannah, ND) — your exact dates depend on your address.
Summer Squash planting schedule for zone 3b
- Start seeds indoorsMay 8, 2026 – Sep 5, 2026
- Start hardening offMay 26, 2026 – Sep 19, 2026
- Transplant outdoorsJun 5, 2026 – Sep 26, 2026
Playing it safe with tender crops? Spring frost holds off until about May 29, 2026 in roughly 9 years out of 10.
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Summer Squash in other zones
More crops for zone 3b
Frost dates are NOAA 1991–2020 climate normals for a representative location (Hannah, ND) in zone 3b; your exact dates depend on your address. Schedules are guidance, not guarantees.