Warm-Season Vegetable

When to Plant Pumpkins in Pennsylvania

From jack-o-lanterns to pies, pumpkins need space and time but deliver a uniquely satisfying harvest.

The Short Answer

Pennsylvania pumpkin patches are a fall institution, and growing your own connects you to a harvest tradition that goes back centuries. The state's moderate climate, fertile valley soils, and defined autumn season make pumpkin growing straightforward — plant in late May to early June and harvest amid the state's spectacular fall foliage.

Pennsylvania Frost Dates

Your planting dates depend on which part of Pennsylvania you're in. Here are the frost date ranges by region:

Region Zones Last Frost (Spring) First Frost (Fall)
Northern Pennsylvania 5a, 5b, 6a May 5 - May 20 Sep 20 - Oct 5
Central Pennsylvania 5b, 6a, 6b Apr 25 - May 10 Oct 1 - Oct 15
Philadelphia Region 7a, 7b Apr 5 - Apr 20 Oct 15 - Nov 5

Pumpkins Planting Schedule for Pennsylvania

Northern Pennsylvania (Zones 5a, 5b, 6a)

Average last frost: May 5 - May 20 · Average first frost: Sep 20 - Oct 5

Start Seeds Indoors
3 wks before frost
Transplant Outside
2 wks after frost
Direct Sow
2 wks after frost

Central Pennsylvania (Zones 5b, 6a, 6b)

Average last frost: Apr 25 - May 10 · Average first frost: Oct 1 - Oct 15

Start Seeds Indoors
3 wks before frost
Transplant Outside
2 wks after frost
Direct Sow
2 wks after frost

Philadelphia Region (Zones 7a, 7b)

Average last frost: Apr 5 - Apr 20 · Average first frost: Oct 15 - Nov 5

Start Seeds Indoors
3 wks before frost
Transplant Outside
2 wks after frost
Direct Sow
2 wks after frost

Growing Pumpkins in Pennsylvania

State-Specific Growing Tips

Southeast PA: plant from late May to mid-June. Central PA: plant from early to mid-June. Northern PA: plant by early June to ensure maturity before frost. Pennsylvania's limestone valley soils are naturally productive for pumpkins. Raised hills with compost improve drainage in the southeast's heavier soils. Give vining varieties plenty of room — 5-6 feet between hills. Penn State Extension recommends stopping irrigation once pumpkins are fully sized and beginning to color.

Recommended Varieties for Pennsylvania

Howden is the Pennsylvania standard for jack-o-lanterns. Connecticut Field for large, classic pumpkins. Sugar Pie and New England Pie for baking. Cinderella for decorative display. For the northern tier, choose varieties under 100 days for frost insurance. Penn State variety trials include pumpkins.

Common Challenges in Pennsylvania

Powdery mildew in late summer. Squash vine borer — monitor from late June. Squash bugs and cucumber beetles. Groundhogs browse young pumpkin vines. Deer damage in rural areas. Frost can catch exposed pumpkins in northern PA if harvest is delayed.

Growing Tips

Count backwards from when you want ripe pumpkins (usually October). They need 90-120 days, so mid-June to early July is often ideal.

Companion Planting

Plant pumpkins alongside these companions for better growth:

Corn Beans Marigolds

Keep pumpkins away from:

Potatoes

The Bottom Line

Pumpkins can be grown successfully in Pennsylvania with proper attention to regional frost dates and local growing conditions. Timing varies across the state — Northern Pennsylvania gardeners work with a last frost around May 5 - May 20, while Philadelphia Region sees frost end around Apr 5 - Apr 20. Choose varieties suited to your region, amend your soil based on its specific needs, and monitor for the pests and diseases most common in your area. For exact dates based on your zip code, use our free planting date finder.

Related Guides

Pumpkins Growing Guide National planting guide with all states Pennsylvania Planting Calendar All plants for Pennsylvania Pumpkins in Alabama Alabama planting dates Pumpkins in Alaska Alaska planting dates Pumpkins in Arizona Arizona planting dates Pumpkins in Arkansas Arkansas planting dates
Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026

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