When to plant pumpkins in Pennsylvania
Pennsylvania’s average last spring frost is May 1, and the first fall frost typically arrives around October 10 — about 162 frost-free days (USDA zones 5a, 5b, 6a, 6b, 7a, 7b). Pumpkin needs 90–120 days to mature, which fits comfortably within Pennsylvania's growing season.
Pennsylvania covers a wide range of climates, so your exact frost dates may differ from the state average by two weeks or more. For dates tuned to your town, use the calendar generator.
When to plant pumpkins in Pennsylvania: the short answer
For a spring planting, plant out May 1 – May 18, with seeds started indoors Apr 3 – Apr 17. Wait until the soil is at least 60°F and frost is over. For Halloween, count back 90–120 days from October 10: sow by Jun 12–Jul 12. See the Halloween plan.
Windows are ~1–2 week bands around each date. Frost dates are a statewide average from NOAA/NCEI normals; your town may differ by two weeks or more. Calendar year 2026.
How to grow pumpkins in Pennsylvania, step by step
- Start seeds indoors (Apr 3 – Apr 17). Sow seeds 1 inch deep in seed-starting mix under bright light. They take 5-10 days to sprout, fastest in soil around 85°F. Harden seedlings off for a week before they go outside.
- Prepare the bed. They need at least six to eight hours of direct sun a day and loose soil at least 18 inches deep, with a pH between 5.5 and 7.5. Dig in compost before planting.
- Plant out (May 1 – May 18). Space plants about 48 inches apart in rows 96 inches apart. It is killed by frost, so nothing goes outside until the danger has passed.
- Water and feed. Give it steady, even moisture, about an inch of water a week from rain or the hose.
- Watch for pests and problems. Pests: squash vine borer, squash bug, striped cucumber beetle. Diseases and disorders: powdery mildew, bacterial wilt.
- Harvest (from about Aug 6 – Sep 5). Pumpkin takes 90-120 days to reach harvest. For Halloween pumpkins in the north, count back 100-120 days from 31 Oct and start indoors. Mini varieties can climb a strong trellis.
Figures come from our crop data; dates use Pennsylvania’s average frost dates. More in the full pumpkin growing guide.
Planting pumpkins in Pennsylvania for Halloween
Spring dates above suit a long season. If you want fruit ready for Halloween, count back from Pennsylvania's average first fall frost (October 10), which comes before Halloween. Pumpkin takes 90–120 days from sowing to a mature fruit, so these are the latest sowing dates. Sow earlier for a margin, but not too early: the University of Arkansas Extension warns that pumpkins planted too early may rot before Halloween.
| Days to maturity | Latest sowing for Halloween | Typical for |
|---|---|---|
| 120 days | June 12 | slowest types (giants) |
| 100 days | July 2 | jack-o'-lantern and pie types (University of Arkansas variety table) |
| 90 days | July 12 | quickest types |
See the full growing guide for pumpkin. Days to maturity vary by variety, so check the seed packet.
Pumpkin planting dates by USDA zone in Pennsylvania
Pennsylvania spans USDA zones 5a, 5b, 6a, 6b, 7a, 7b. Colder zones, usually higher or further inland, have a later last spring frost and an earlier first fall frost than the state average, so the pumpkin dates shift with them.
When to plant pumpkins in nearby states
| State | Last frost | Plant out |
|---|---|---|
| Pennsylvania (this page) | May 1 | May 1 – May 18 |
| New Jersey | April 20 | Apr 20 – May 7 |
| Delaware | April 14 | Apr 14 – May 1 |
| Maryland | April 14 | Apr 14 – May 1 |
| District of Columbia | April 10 | Apr 10 – Apr 27 |
| Virginia | April 15 | Apr 15 – May 2 |
| West Virginia | May 5 | May 5 – May 22 |
Questions gardeners in Pennsylvania ask
When is the best time to plant pumpkins in Pennsylvania?
Plant pumpkin transplants outdoors in Pennsylvania between May 1 and May 18. That timing is set by Pennsylvania's average last spring frost of May 1; Pennsylvania spans several climates, so cooler and higher parts of the state run later.
When should I start pumpkin seeds indoors in Pennsylvania?
Start seeds indoors between April 3 and April 17, about 3 weeks before the last frost, so the seedlings are ready to plant out from May 1.
What is the latest I can plant pumpkins in Pennsylvania?
About July 12. Pumpkins need at least 90 days to mature, and frost around October 10 ends the season, so later plantings risk being cut short. If you want ripe fruit for Halloween, the cut-off is earlier: see the Halloween dates on this page.
When will pumpkins planted in Pennsylvania be ready to harvest?
Planted on time, pumpkins are usually ready from about August 6 to September 5, 90-120 days after planting.
When should I plant pumpkins in Pennsylvania for Halloween?
Count back 90-120 days from October 10, Pennsylvania's average first fall frost, which comes before Halloween: the latest sowing dates are June 12 to July 12. Sow a little earlier for a margin.
When is the last frost in Pennsylvania?
On average around May 1, with the first fall frost around October 10 - about 162 frost-free days. Your town may differ by two weeks or more.