When to Plant Butternut Squash in Oregon
State
Oregon
Cities Covered
372
USDA Zones
5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
Plant Type
Indoor Start
📅 Planting Calendar for Oregon
Based on Portland (Zone 8b). Dates may vary by city.
Note: Oregon spans multiple zones (5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b). Select your city below for more precise dates.
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Growing Butternut Squash in Oregon
Butternut Squash (Cucurbita moschata) is a popular garden vegetable in Oregon. The state spans USDA Hardiness Zones 5b, 6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b, so planting dates can vary significantly depending on your location.
For most of Oregon, you should start Butternut Squash seeds indoors around Sunday, February 15, 2026, then transplant outdoors around Sunday, March 29, 2026.
For the most accurate planting dates, enter your ZIP code on our homepage or select your city from the list above.