Springboro 3 WNW, PA Frost Dates & Growing Season

The two dates every Springboro 3 WNW garden is planned around, plus ready-computed planting windows for the most popular crops.

Last spring frost
May 8
~50% chance of frost after
First fall frost
Oct 16
~50% chance of frost before
Growing season
161 days
frost-free stretch
USDA zone
≈ 6b
estimated from nearby reference
Risky (1 year in 10)MedianSafe (9 years in 10)
Last spring frost Apr 23 May 8 May 23
First fall frost Nov 2 Oct 16 Oct 1
Hard freeze (28°F), median last Apr 26 · first Nov 1

Computed from NOAA 1991–2020 climate normals at the SPRINGBORO 3 WNW station. "Safe" means frost past that date happens only about one year in ten. Your exact garden can still run days either way with elevation and terrain — check your own ZIP with the frost date lookup.

Planting windows for Springboro 3 WNW

Computed from Springboro 3 WNW's own frost dates. Click any crop for the full zone-6 growing guide — varieties, spacing, fall plantings, and more.

CropStart seeds indoorsTransplantDirect sow
🍅 Tomatoes Mar 13 – Mar 27 May 15 – May 22
🫑 Peppers Feb 27 – Mar 13 May 22 – May 29
🥬 Lettuce Mar 27 – Apr 10 Apr 10 – Apr 24 Apr 10 – May 8
🫛 Peas Mar 27 – Apr 10
🥕 Carrots Apr 17 – May 8
🥦 Broccoli Mar 20 – Apr 3 Apr 17 – May 1
🥬 Kale Mar 27 – Apr 10 Apr 10 – Apr 24 Apr 10 – Apr 24
🥒 Cucumbers Apr 10 – Apr 17 May 15 – May 22 May 15 – May 22
🥒 Zucchini Apr 10 – Apr 17 May 15 – May 22 May 15 – May 22
🫘 Green Beans (Bush) May 15 – May 22
🌽 Sweet Corn May 15 – May 22
🌿 Basil Mar 27 – Apr 10 May 15 – May 22 May 22 – May 29
🧄 Garlic Fall: Sep 4 – Oct 2

Want this for all 50 crops, or as a printable seed-shelf schedule? Use the planting calendar and the seed starting scheduler — both can use Springboro 3 WNW's dates automatically after a lookup.

Reading the season in Springboro 3 WNW

Roughly 161 frost-free days gives Springboro 3 WNW gardeners room for nearly every common vegetable. Warm-season crops go out after May 8; a fall garden sown in late summer matures comfortably before the Oct 16 frost.

Frequently asked questions

When is the last frost in Springboro 3 WNW, PA?

The average last spring frost in Springboro 3 WNW is around May 8, based on 1991–2020 climate normals. That's a median — about half of years see a later frost, so tender crops are safest going out a week or two after this date.

When is the first frost in Springboro 3 WNW, PA?

The average first fall frost in Springboro 3 WNW arrives around Oct 16. Crops still in the garden need to mature before then, and frost-tender plants need harvesting or protection as the date approaches.

How long is the growing season in Springboro 3 WNW?

About 161 frost-free days on average, from May 8 to Oct 16. That fits nearly all common vegetables, though the longest-season melons and sweet potatoes benefit from transplants.

What USDA zone is Springboro 3 WNW in?

USDA zone 6b on the 2023 Plant Hardiness Zone Map. Note that zones describe winter cold, not frost timing — these frost dates are the numbers to plan plantings around.