Grantsville, MD frost dates
Last spring frostMay 12median date
First fall frostOct 5median date
Growing season146 daysfrost-free
Hardiness zone6aZone 6a
How Grantsville compares
- In 8 years out of 10, the last spring frost in Grantsville falls between April 25 and May 28, a 33-day window. The first fall frost falls between September 24 and October 18.
- The median last frost is 37 days later than the Maryland median of Apr 5.
- Its 146-day growing season is among the shortest of the 431 Maryland places with a regular frost season.
- The last frost is 13 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 156 nights a year at or below 32°F.
- Compared with Pittsburgh, PA, 115 km away, the last frost here is 18 days later than there and the growing season is 40 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 25 |
| 50% (median) | May 12 |
| 10% (safe for tender plants) | May 28 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 24 |
| 50% (median) | October 5 |
| 90% (late) | October 18 |
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 Grantsville, MD
Grantsville, MD frost dates — last frost May 12, first frost Oct 5, zone 6a. whenisthelastfrost.com
Crop
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Start indoors: Feb 17 to Mar 3Transplant outside: Apr 14 to Apr 28
Start indoors: Mar 3 to Mar 17Transplant outside: May 26 to Jun 9
Start indoors: Mar 3 to Mar 17Transplant outside: May 26 to Jun 9
Start indoors: Mar 17 to Mar 31Transplant outside: May 19 to Jun 2
Start indoors: Mar 17 to Mar 31Transplant outside: Apr 21 to May 5Sow outdoors: Apr 14 to May 19Plant for fall: Aug 10 to Sep 7
Start indoors: Mar 17 to Mar 31Transplant outside: Apr 14 to Apr 28Sow outdoors: Apr 14 to Apr 28Plant for fall: Jul 27 to Aug 17
Start indoors: Mar 17 to Mar 31Transplant outside: Apr 28 to May 12Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 17 to Mar 31Transplant outside: Apr 21 to May 5Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 17 to Mar 31Transplant outside: Apr 28 to May 12Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 31 to Apr 14Transplant outside: Jun 2 to Jun 16Sow outdoors: Jun 2 to Jun 16
Start indoors: Mar 31 to Apr 14Transplant outside: May 19 to Jun 2
Sow outdoors: Mar 31 to Apr 21Plant for fall: Jul 13 to Aug 3
Sow outdoors: Mar 31 to Apr 21Plant for fall: Aug 10 to Aug 31
Sow outdoors: Apr 7 to May 19Plant for fall: Aug 24 to Sep 14
Start indoors: Apr 14 to Apr 21Transplant outside: May 26 to Jun 2Sow outdoors: May 19 to Jun 2Plant for fall: Jul 20 to Aug 3
Start indoors: Apr 14 to Apr 21Sow outdoors: May 19 to Jun 2Plant for fall: Jul 27 to Aug 10
Start indoors: Apr 14 to Apr 21Sow outdoors: May 19 to Jun 2
Start indoors: Apr 14 to Apr 21Transplant outside: May 26 to Jun 9
Sow outdoors: Apr 21 to May 19Plant for fall: Jul 13 to Jul 27
Sow outdoors: Apr 21 to May 19Plant for fall: Jul 27 to Aug 10
Sow outdoors: Apr 21 to May 12
Sow outdoors: Apr 28 to May 26Plant for fall: Jul 27 to Aug 10
Sow outdoors: Apr 28 to May 19Plant for fall: Aug 10 to Aug 31
Sow outdoors: May 19 to Jun 9Plant for fall: Jul 20 to Aug 3
Sow outdoors: May 19 to Jun 2
Transplant outside: May 26 to Jun 16
Plant for fall: Sep 21 to Oct 26
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Grantsville, MD
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 17 – Mar 3 | Apr 14 – Apr 28 | — | — |
| Peppers | Mar 3 – Mar 17 | May 26 – Jun 9 | — | — |
| Eggplant | Mar 3 – Mar 17 | May 26 – Jun 9 | — | — |
| Tomatoes | Mar 17 – Mar 31 | May 19 – Jun 2 | — | — |
| Lettuce | Mar 17 – Mar 31 | Apr 21 – May 5 | Apr 14 – May 19 | Aug 10 – Sep 7 |
| Kale | Mar 17 – Mar 31 | Apr 14 – Apr 28 | Apr 14 – Apr 28 | Jul 27 – Aug 17 |
| Broccoli | Mar 17 – Mar 31 | Apr 28 – May 12 | — | Jun 29 – Jul 20 |
| Cabbage | Mar 17 – Mar 31 | Apr 21 – May 5 | — | Jun 29 – Jul 20 |
| Cauliflower | Mar 17 – Mar 31 | Apr 28 – May 12 | — | Jun 29 – Jul 20 |
| Okra | Mar 31 – Apr 14 | Jun 2 – Jun 16 | Jun 2 – Jun 16 | — |
| Basil | Mar 31 – Apr 14 | May 19 – Jun 2 | — | — |
| Peas | — | — | Mar 31 – Apr 21 | Jul 13 – Aug 3 |
| Spinach | — | — | Mar 31 – Apr 21 | Aug 10 – Aug 31 |
| Radishes | — | — | Apr 7 – May 19 | Aug 24 – Sep 14 |
| Cucumbers | Apr 14 – Apr 21 | May 26 – Jun 2 | May 19 – Jun 2 | Jul 20 – Aug 3 |
| Zucchini & Summer Squash | Apr 14 – Apr 21 | — | May 19 – Jun 2 | Jul 27 – Aug 10 |
| Winter Squash & Pumpkins | Apr 14 – Apr 21 | — | May 19 – Jun 2 | — |
| Melons & Watermelon | Apr 14 – Apr 21 | May 26 – Jun 9 | — | — |
| Carrots | — | — | Apr 21 – May 19 | Jul 13 – Jul 27 |
| Beets | — | — | Apr 21 – May 19 | Jul 27 – Aug 10 |
| Potatoes | — | — | Apr 21 – May 12 | — |
| Swiss Chard | — | — | Apr 28 – May 26 | Jul 27 – Aug 10 |
| Cilantro | — | — | Apr 28 – May 19 | Aug 10 – Aug 31 |
| Green Beans | — | — | May 19 – Jun 9 | Jul 20 – Aug 3 |
| Sweet Corn | — | — | May 19 – Jun 2 | — |
| Sweet Potatoes | — | May 26 – Jun 16 | — | — |
| Garlic | — | — | — | Sep 21 – Oct 26 |
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 Meyersdale 2 Ssw, PA weather station, 16 km away (elevation 2,001 ft (610 m)).
Frost dates near Grantsville
- Bittinger Apr 29 · Oct 20
- Lonaconing Apr 29 · Oct 18
- Midlothian Apr 29 · Oct 18
- Barton Apr 29 · Oct 20
- Accident May 9 · Oct 11
- Frostburg Apr 29 · Oct 18
- Midland Apr 29 · Oct 18
- Eckhart Mines Apr 29 · Oct 18
- Bloomington Apr 29 · Oct 20
- Luke Apr 30 · Oct 15
Frequently asked questions
When is the last frost in Grantsville, MD?
The median last spring frost in Grantsville, MD is May 12. 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 Grantsville, MD?
The median first fall frost is October 5, with about a 10% chance of frost before September 24.
How long is the growing season in Grantsville, MD?
About 146 days between the median last spring frost and first fall frost.
What planting zone is Grantsville, MD?
Grantsville, MD is in USDA hardiness zone 6a.