When to Plant Squash by Zone
A zone-based squash planting guide for summer squash, acorn squash, and butternut squash timing.
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squash butternut squash acorn squash zones
When to Plant Squash
Plant squash after frost danger has passed and soil has warmed. Squash seed can rot or stall in cold soil, so wait until the bed is warm and daytime temperatures are settled. Summer squash matures quickly, often around 50 days. Winter squash such as butternut and acorn squash needs a longer season, often 80 to 110 days depending on type.
The ThriveThyme butternut squash guide lists spring planting from mid May to June in zones 1 to 3, late April to May in zones 4 to 6, April to May in zone 7, March to May in zone 8, and earlier spring windows in zones 9 through 12.
Summer Squash Timing
Summer squash is more forgiving because it matures quickly. In zones 4 to 8, plant after the last frost, then sow again a few weeks later if pest pressure is high. In zones 9 to 12, spring and fall crops are often possible where heat and disease pressure allow.
Butternut and Acorn Squash Timing
Butternut and acorn squash should be planted early enough to mature before frost. In zones 1 to 4, use transplants if your season is short. In zones 5 to 8, direct sowing works after soil warms. In zones 9 and warmer, avoid planting so late that vines flower during extreme heat.
Spacing and Care
- Plant depth: Sow seeds about 1 inch deep.
- Spacing: Give compact plants about 24 to 36 inches and vining winter squash more room.
- Sun: Use full sun.
- Water: Deep, steady watering is better than frequent shallow watering.
Next Steps
Choose summer squash for a quick crop and winter squash for storage. If your frost-free season is short, start butternut or acorn squash indoors and transplant carefully after the soil warms.