Pennsylvania Planting Guide & Growing Season
Pennsylvania is in USDA hardiness zone with a growing season of 175 days. The average last spring frost is Apr 15 - May 10 and the average first fall frost is Oct 1 - Oct 31.
Growing Conditions in Pennsylvania
How Pennsylvania Compares
Compare Pennsylvania's growing conditions with states that have similar climates.
| State | USDA Zone | Last Frost | First Frost | Season (days) |
|---|---|---|---|---|
| Pennsylvania (PA) | Apr 15 - May 10 | Oct 1 - Oct 31 | 175 | |
| Alabama (AL) | Mar 1 - Apr 1 | Oct 25 - Nov 15 | 220 | |
| Alaska (AK) | May 15 - Jun 15 | Aug 15 - Sep 15 | 105 | |
| Arizona (AZ) | Feb 1 - Apr 15 | Oct 15 - Dec 15 | 270 | |
| Arkansas (AR) | Mar 15 - Apr 15 | Oct 15 - Nov 1 | 210 | |
| California (CA) | Jan 15 - Apr 15 | Oct 15 - Dec 31 | 290 |
Frequently Asked Questions About Gardening in Pennsylvania
When should I start seeds indoors in Pennsylvania?
In Pennsylvania, the average last frost date is Apr 15 - May 10. Start most seeds indoors 6-8 weeks before this date. The USDA hardiness zone for Pennsylvania is undefined, with a growing season of approximately 175 days.
What USDA hardiness zone is Pennsylvania?
Pennsylvania falls in USDA hardiness zones undefined. This affects which perennial plants will survive winter and influences optimal planting times.
When is the first frost in Pennsylvania?
The average first frost date in Pennsylvania is Oct 1 - Oct 31. Plan to harvest cold-sensitive crops before this date or protect them with row covers.
How long is the growing season in Pennsylvania?
Pennsylvania has an average growing season of 175 days, from the last frost (Apr 15 - May 10) to first frost (Oct 1 - Oct 31). This moderate season works well for most common vegetables.
Plan Your Garden
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