Coolspring, PA frost dates
Last spring frostMay 10median date
First fall frostOct 12median date
Growing season155 daysfrost-free
Hardiness zone6aZone 6a
How Coolspring compares
- In 8 years out of 10, the last spring frost in Coolspring falls between April 24 and May 28, a 34-day window. The first fall frost falls between September 30 and October 27.
- The median last frost is 13 days later than the Pennsylvania median of Apr 27.
- Its 155-day growing season is longer than 14% of the 1,787 Pennsylvania places with a regular frost season (state median 175 days).
- The last frost is 11 days later than the zone 6a median of Apr 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6a chart.
- The weather station records an average of 152 nights a year at or below 32°F.
- Compared with Pittsburgh, PA, 102 km away, the last frost here is 16 days later than there and the growing season is 31 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 24 |
| 50% (median) | May 10 |
| 10% (safe for tender plants) | May 28 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 30 |
| 50% (median) | October 12 |
| 90% (late) | October 27 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Coolspring, PA
Coolspring, PA frost dates — last frost May 10, first frost Oct 12, zone 6a. whenisthelastfrost.com
Crop
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Start indoors: Feb 15 to Mar 1Transplant outside: Apr 12 to Apr 26
Start indoors: Mar 1 to Mar 15Transplant outside: May 24 to Jun 7
Start indoors: Mar 1 to Mar 15Transplant outside: May 24 to Jun 7
Start indoors: Mar 15 to Mar 29Transplant outside: May 17 to May 31
Start indoors: Mar 15 to Mar 29Transplant outside: Apr 19 to May 3Sow outdoors: Apr 12 to May 17Plant for fall: Aug 17 to Sep 14
Start indoors: Mar 15 to Mar 29Transplant outside: Apr 12 to Apr 26Sow outdoors: Apr 12 to Apr 26Plant for fall: Aug 3 to Aug 24
Start indoors: Mar 15 to Mar 29Transplant outside: Apr 26 to May 10Plant for fall: Jul 6 to Jul 27
Start indoors: Mar 15 to Mar 29Transplant outside: Apr 19 to May 3Plant for fall: Jul 6 to Jul 27
Start indoors: Mar 15 to Mar 29Transplant outside: Apr 26 to May 10Plant for fall: Jul 6 to Jul 27
Start indoors: Mar 29 to Apr 12Transplant outside: May 31 to Jun 14Sow outdoors: May 31 to Jun 14
Start indoors: Mar 29 to Apr 12Transplant outside: May 17 to May 31
Sow outdoors: Mar 29 to Apr 19Plant for fall: Jul 20 to Aug 10
Sow outdoors: Mar 29 to Apr 19Plant for fall: Aug 17 to Sep 7
Sow outdoors: Apr 5 to May 17Plant for fall: Aug 31 to Sep 21
Start indoors: Apr 12 to Apr 19Transplant outside: May 24 to May 31Sow outdoors: May 17 to May 31Plant for fall: Jul 27 to Aug 10
Start indoors: Apr 12 to Apr 19Sow outdoors: May 17 to May 31Plant for fall: Aug 3 to Aug 17
Start indoors: Apr 12 to Apr 19Sow outdoors: May 17 to May 31
Start indoors: Apr 12 to Apr 19Transplant outside: May 24 to Jun 7
Sow outdoors: Apr 19 to May 17Plant for fall: Jul 20 to Aug 3
Sow outdoors: Apr 19 to May 17Plant for fall: Aug 3 to Aug 17
Sow outdoors: Apr 19 to May 10
Sow outdoors: Apr 26 to May 24Plant for fall: Aug 3 to Aug 17
Sow outdoors: Apr 26 to May 17Plant for fall: Aug 17 to Sep 7
Sow outdoors: May 17 to Jun 7Plant for fall: Jul 27 to Aug 10
Sow outdoors: May 17 to May 31
Transplant outside: May 24 to Jun 14
Plant for fall: Sep 28 to Nov 2
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Coolspring, PA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 15 – Mar 1 | Apr 12 – Apr 26 | — | — |
| Peppers | Mar 1 – Mar 15 | May 24 – Jun 7 | — | — |
| Eggplant | Mar 1 – Mar 15 | May 24 – Jun 7 | — | — |
| Tomatoes | Mar 15 – Mar 29 | May 17 – May 31 | — | — |
| Lettuce | Mar 15 – Mar 29 | Apr 19 – May 3 | Apr 12 – May 17 | Aug 17 – Sep 14 |
| Kale | Mar 15 – Mar 29 | Apr 12 – Apr 26 | Apr 12 – Apr 26 | Aug 3 – Aug 24 |
| Broccoli | Mar 15 – Mar 29 | Apr 26 – May 10 | — | Jul 6 – Jul 27 |
| Cabbage | Mar 15 – Mar 29 | Apr 19 – May 3 | — | Jul 6 – Jul 27 |
| Cauliflower | Mar 15 – Mar 29 | Apr 26 – May 10 | — | Jul 6 – Jul 27 |
| Okra | Mar 29 – Apr 12 | May 31 – Jun 14 | May 31 – Jun 14 | — |
| Basil | Mar 29 – Apr 12 | May 17 – May 31 | — | — |
| Peas | — | — | Mar 29 – Apr 19 | Jul 20 – Aug 10 |
| Spinach | — | — | Mar 29 – Apr 19 | Aug 17 – Sep 7 |
| Radishes | — | — | Apr 5 – May 17 | Aug 31 – Sep 21 |
| Cucumbers | Apr 12 – Apr 19 | May 24 – May 31 | May 17 – May 31 | Jul 27 – Aug 10 |
| Zucchini & Summer Squash | Apr 12 – Apr 19 | — | May 17 – May 31 | Aug 3 – Aug 17 |
| Winter Squash & Pumpkins | Apr 12 – Apr 19 | — | May 17 – May 31 | — |
| Melons & Watermelon | Apr 12 – Apr 19 | May 24 – Jun 7 | — | — |
| Carrots | — | — | Apr 19 – May 17 | Jul 20 – Aug 3 |
| Beets | — | — | Apr 19 – May 17 | Aug 3 – Aug 17 |
| Potatoes | — | — | Apr 19 – May 10 | — |
| Swiss Chard | — | — | Apr 26 – May 24 | Aug 3 – Aug 17 |
| Cilantro | — | — | Apr 26 – May 17 | Aug 17 – Sep 7 |
| Green Beans | — | — | May 17 – Jun 7 | Jul 27 – Aug 10 |
| Sweet Corn | — | — | May 17 – May 31 | — |
| Sweet Potatoes | — | May 24 – Jun 14 | — | — |
| Garlic | — | — | — | Sep 28 – Nov 2 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Putneyville 2 Se Dam, PA weather station, 21 km away (elevation 1,280 ft (390 m)).
Frost dates near Coolspring
- Sprankle Mills May 10 · Oct 12
- Worthville May 10 · Oct 12
- Knox Dale May 6 · Oct 14
- Oliveburg May 10 · Oct 12
- Ringgold May 10 · Oct 12
- Summerville May 10 · Oct 12
- Anita May 6 · Oct 14
- Walston May 10 · Oct 12
- Timblin May 10 · Oct 12
- Hamilton May 10 · Oct 12
Frequently asked questions
When is the last frost in Coolspring, PA?
The median last spring frost in Coolspring, PA is May 10. There is still about a 10% chance of frost after May 28, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Coolspring, PA?
The median first fall frost is October 12, with about a 10% chance of frost before September 30.
How long is the growing season in Coolspring, PA?
About 155 days between the median last spring frost and first fall frost.
What planting zone is Coolspring, PA?
Coolspring, PA is in USDA hardiness zone 6a.