Bridgewater, ME frost dates
Last spring frostMay 25median date
First fall frostSep 18median date
Growing season116 daysfrost-free
Hardiness zone4bZone 4b
How Bridgewater compares
- In 8 years out of 10, the last spring frost in Bridgewater falls between May 9 and June 7, a 29-day window. The first fall frost falls between September 4 and October 1.
- The median last frost is 19 days later than the Maine median of May 6.
- Its 116-day growing season is among the shortest of the 457 Maine places with a regular frost season.
- The last frost is 17 days later than the zone 4b median of May 8. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 4b chart.
- The weather station records an average of 186 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 9 |
| 50% (median) | May 25 |
| 10% (safe for tender plants) | June 7 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 4 |
| 50% (median) | September 18 |
| 90% (late) | October 1 |
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 Bridgewater, ME
Bridgewater, ME frost dates — last frost May 25, first frost Sep 18, zone 4b. whenisthelastfrost.com
Crop
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Start indoors: Mar 2 to Mar 16Transplant outside: Apr 27 to May 11
Start indoors: Mar 16 to Mar 30Transplant outside: Jun 8 to Jun 22
Start indoors: Mar 16 to Mar 30Transplant outside: Jun 8 to Jun 22
Start indoors: Mar 30 to Apr 13Transplant outside: Jun 1 to Jun 15
Start indoors: Mar 30 to Apr 13Transplant outside: May 4 to May 18Sow outdoors: Apr 27 to Jun 1Plant for fall: Jul 24 to Aug 21
Start indoors: Mar 30 to Apr 13Transplant outside: Apr 27 to May 11Sow outdoors: Apr 27 to May 11Plant for fall: Jul 10 to Jul 31
Start indoors: Mar 30 to Apr 13Transplant outside: May 11 to May 25Plant for fall: Jun 12 to Jul 3
Start indoors: Mar 30 to Apr 13Transplant outside: May 4 to May 18Plant for fall: Jun 12 to Jul 3
Start indoors: Mar 30 to Apr 13Transplant outside: May 11 to May 25Plant for fall: Jun 12 to Jul 3
Start indoors: Apr 13 to Apr 27Transplant outside: Jun 15 to Jun 29Sow outdoors: Jun 15 to Jun 29
Start indoors: Apr 13 to Apr 27Transplant outside: Jun 1 to Jun 15
Sow outdoors: Apr 13 to May 4Plant for fall: Jun 26 to Jul 17
Sow outdoors: Apr 13 to May 4Plant for fall: Jul 24 to Aug 14
Sow outdoors: Apr 20 to Jun 1Plant for fall: Aug 7 to Aug 28
Start indoors: Apr 27 to May 4Transplant outside: Jun 8 to Jun 15Sow outdoors: Jun 1 to Jun 15Plant for fall: Jul 3 to Jul 17
Start indoors: Apr 27 to May 4Sow outdoors: Jun 1 to Jun 15Plant for fall: Jul 10 to Jul 24
Start indoors: Apr 27 to May 4Sow outdoors: Jun 1 to Jun 15
Start indoors: Apr 27 to May 4Transplant outside: Jun 8 to Jun 22
Sow outdoors: May 4 to Jun 1Plant for fall: Jun 26 to Jul 10
Sow outdoors: May 4 to Jun 1Plant for fall: Jul 10 to Jul 24
Sow outdoors: May 4 to May 25
Sow outdoors: May 11 to Jun 8Plant for fall: Jul 10 to Jul 24
Sow outdoors: May 11 to Jun 1Plant for fall: Jul 24 to Aug 14
Sow outdoors: Jun 1 to Jun 22
Sow outdoors: Jun 1 to Jun 15
Transplant outside: Jun 8 to Jun 29
Plant for fall: Sep 4 to Oct 9
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Bridgewater, ME
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 2 – Mar 16 | Apr 27 – May 11 | — | — |
| Peppers | Mar 16 – Mar 30 | Jun 8 – Jun 22 | — | — |
| Eggplant | Mar 16 – Mar 30 | Jun 8 – Jun 22 | — | — |
| Tomatoes | Mar 30 – Apr 13 | Jun 1 – Jun 15 | — | — |
| Lettuce | Mar 30 – Apr 13 | May 4 – May 18 | Apr 27 – Jun 1 | Jul 24 – Aug 21 |
| Kale | Mar 30 – Apr 13 | Apr 27 – May 11 | Apr 27 – May 11 | Jul 10 – Jul 31 |
| Broccoli | Mar 30 – Apr 13 | May 11 – May 25 | — | Jun 12 – Jul 3 |
| Cabbage | Mar 30 – Apr 13 | May 4 – May 18 | — | Jun 12 – Jul 3 |
| Cauliflower | Mar 30 – Apr 13 | May 11 – May 25 | — | Jun 12 – Jul 3 |
| Okra | Apr 13 – Apr 27 | Jun 15 – Jun 29 | Jun 15 – Jun 29 | — |
| Basil | Apr 13 – Apr 27 | Jun 1 – Jun 15 | — | — |
| Peas | — | — | Apr 13 – May 4 | Jun 26 – Jul 17 |
| Spinach | — | — | Apr 13 – May 4 | Jul 24 – Aug 14 |
| Radishes | — | — | Apr 20 – Jun 1 | Aug 7 – Aug 28 |
| Cucumbers | Apr 27 – May 4 | Jun 8 – Jun 15 | Jun 1 – Jun 15 | Jul 3 – Jul 17 |
| Zucchini & Summer Squash | Apr 27 – May 4 | — | Jun 1 – Jun 15 | Jul 10 – Jul 24 |
| Winter Squash & Pumpkins | Apr 27 – May 4 | — | Jun 1 – Jun 15 | — |
| Melons & Watermelon | Apr 27 – May 4 | Jun 8 – Jun 22 | — | — |
| Carrots | — | — | May 4 – Jun 1 | Jun 26 – Jul 10 |
| Beets | — | — | May 4 – Jun 1 | Jul 10 – Jul 24 |
| Potatoes | — | — | May 4 – May 25 | — |
| Swiss Chard | — | — | May 11 – Jun 8 | Jul 10 – Jul 24 |
| Cilantro | — | — | May 11 – Jun 1 | Jul 24 – Aug 14 |
| Green Beans | — | — | Jun 1 – Jun 22 | — |
| Sweet Corn | — | — | Jun 1 – Jun 15 | — |
| Sweet Potatoes | — | Jun 8 – Jun 29 | — | — |
| Garlic | — | — | — | Sep 4 – Oct 9 |
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 Bridgewater, ME weather station, about 1 km away (elevation 420 ft (128 m)).
Frost dates near Bridgewater
- Blaine May 25 · Sep 18
- Mars Hill May 25 · Sep 18
- Monticello May 19 · Sep 23
- Westfield May 14 · Sep 26
- Easton May 14 · Sep 26
- Presque Isle May 14 · Sep 26
- Houlton May 27 · Sep 18
- Mapleton May 14 · Sep 26
- Fort Fairfield May 14 · Sep 26
- New Limerick May 27 · Sep 18
Frequently asked questions
When is the last frost in Bridgewater, ME?
The median last spring frost in Bridgewater, ME is May 25. There is still about a 10% chance of frost after June 7, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Bridgewater, ME?
The median first fall frost is September 18, with about a 10% chance of frost before September 4.
How long is the growing season in Bridgewater, ME?
About 116 days between the median last spring frost and first fall frost.
What planting zone is Bridgewater, ME?
Bridgewater, ME is in USDA hardiness zone 4b.