🌱 Free USDA zone, frost dates & planting calendar, by ZIP About & data sources
My Planting Zone know your zone

Plant Squash (winter) in Zone 3a

Seed-starting, transplant & harvest dates for USDA Zone 3a

Start indoors
Apr 24
Transplant
May 29
Direct sow
May 29
Harvest (~95d)
Sep 1

Zone 3a averages 123 frost-free days, running from a last spring frost around May 15 to a first fall frost around September 15. Squash (winter) needs roughly 95 days from planting out to first harvest, so it uses about 77 percent of that window. Squash (winter) is a tender crop, which is what decides where in the window it belongs.

Because squash (winter) needs a head start, sow seed indoors around Apr 24, about 3 weeks ahead of the Zone 3a last frost. Transplants go out around May 29. Starting earlier than that in Zone 3a usually backfires: plants outgrow their cells and stall when they finally hit cold soil.

Fall planting: squash (winter) in Zone 3a

Squash (winter) has no useful fall window in Zone 3a. Winter squash needs too many days to maturity for a second planting outside the tropics.

Winter squash needs too many days to maturity for a second planting outside the tropics.

Fall dates are counted backward from the Zone 3a average first frost, not forward from a sowing date. See the fall planting calendar by zone for the full method.

Spring vs fall squash (winter) in Zone 3a

Planting Sow or start In the ground Harvest
Spring Apr 24 May 29 Sep 1
Fall — — —
Last spring frost
May 15
First fall frost
Sep 15
Growing season
123 days

Squash (winter) in nearby zones

Squash (winter) in Zone 3b (warmer) Full Squash (winter) grow guide Zone 3a planting calendar

Further reading on squash (winter)

Other crops in Zone 3a

Tomatoes in Zone 3a Peppers in Zone 3a Cucumbers in Zone 3a Lettuce in Zone 3a Zucchini in Zone 3a Carrots in Zone 3a Beans (bush) in Zone 3a Peas in Zone 3a Broccoli in Zone 3a Spinach in Zone 3a Kale in Zone 3a Onions in Zone 3a Garlic in Zone 3a Potatoes in Zone 3a Corn in Zone 3a Radishes in Zone 3a Beets in Zone 3a Eggplant in Zone 3a Basil in Zone 3a Cilantro in Zone 3a Parsley in Zone 3a Pumpkins in Zone 3a Sunflowers in Zone 3a

Frequently asked questions

When should I start squash (winter) in Zone 3a?

Start squash (winter) seeds indoors around Apr 24 (Zone 3a).

Can I direct sow squash (winter) in Zone 3a?

Yes, direct sow around May 29.

Can I plant squash (winter) in the fall in Zone 3a?

Squash (winter) has no useful fall window in Zone 3a. Winter squash needs too many days to maturity for a second planting outside the tropics.

Will squash (winter) survive frost in Zone 3a?

No. Squash (winter) is a tender crop and a single light frost ends it, so every Zone 3a planting has to finish before the average first frost.