Scranton, PA Frost Dates
Average frost dates, USDA hardiness zone, and growing season length for Scranton, Pennsylvania.
Gardening in Scranton
The Electric City's anthracite heritage gave way to a resilient, adaptable community — qualities that serve well in northeastern Pennsylvania's sometimes challenging garden climate.
Northeast Pennsylvania's zone 5b means genuine cold and a 163-day growing season. The Lackawanna Valley creates a cooler microclimate than the lowlands to the south. The rocky, acidic soil reflects the region's mining heritage and geological character. Blueberries love it; most vegetables need lime.
The Scranton area's strong Italian and Polish communities brought food garden traditions that persist in South Side and West Side neighborhood plots. Growing your own tomatoes for Sunday gravy isn't nostalgic — it's essential.
What This Means for Scranton Gardeners
The average last spring frost in Scranton is around April 28, and the average first fall frost arrives around October 8. That gives you approximately 163 frost-free days to work with.
At 163 days, you're working with a compressed but productive window. Choose varieties by their days-to-maturity number — anything under 75 days is safe, 75-90 requires indoor starting, and 90+ is a calculated risk. The tradeoff: your cool, moderate summers are excellent for crops that heat-zone gardeners struggle with. Your lettuce doesn't bolt in June. Your peas produce for weeks longer. Cool-season crops are your superpower.
These dates are based on NOAA 30-year Climate Normal data for the Scranton area. Your actual frost dates could shift 2-3 weeks in either direction in any given year. Learn more about our data sources.
What to Grow in Scranton
Scranton's 163-day season gives you plenty of time for most vegetables with good planning. Start warm-season crops indoors to maximize your window. Cool-season crops thrive in your spring and fall shoulder seasons. Recommended starting points: tomatoes, peppers, lettuce, carrots, beans, broccoli, garlic, and basil.
See the full Pennsylvania planting guide for all 40 plants: Pennsylvania Planting Calendar. Or enter your zip code for exact planting dates personalized to Scranton.
More About Zone 5B
Scranton is in USDA Hardiness Zone 5B, which means average annual extreme minimum temperatures between -15°F to -10°F. View the full Zone 5B planting guide.
See the complete planting calendar for Pennsylvania: Pennsylvania Planting Calendar.
Other Cities in Pennsylvania
Frequently Asked Questions
These dates are based on NOAA's 30-year Climate Normal data for the Scranton area. They represent historical averages, not predictions. In any given year, the actual last frost could be 2-3 weeks earlier or later. Microclimates within Scranton (urban heat islands, hilltops, low-lying valleys) can also shift your local frost dates by a week or more.
Start warm-season seeds indoors 6-8 weeks before your last frost (April 28) to maximize your 163-day window. Direct sow cold-hardy crops like peas and lettuce 3-4 weeks before last frost. Every week of early indoor starting matters at this season length. Enter your zip code for exact dates.