Liberty, ME frost dates
Last spring frostApr 27median date
First fall frostOct 19median date
Growing season175 daysfrost-free
Hardiness zone5bZone 5b
How Liberty compares
- In 8 years out of 10, the last spring frost in Liberty falls between April 17 and May 9, a 22-day window. The first fall frost falls between October 5 and November 3.
- The median last frost is 9 days earlier than the Maine median of May 6.
- Its 175-day growing season is longer than 84% of the 457 Maine places with a regular frost season (state median 154 days).
- The last frost is 4 days earlier than the zone 5b median of May 1. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5b chart.
- The weather station records an average of 148 nights a year at or below 32°F.
- Compared with Portland, ME, 108 km away, the last frost here is 1 day later than there and the growing season is 3 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 17 |
| 50% (median) | April 27 |
| 10% (safe for tender plants) | May 9 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 5 |
| 50% (median) | October 19 |
| 90% (late) | November 3 |
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 Liberty, ME
Liberty, ME frost dates — last frost Apr 27, first frost Oct 19, zone 5b. whenisthelastfrost.com
Crop
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Start indoors: Feb 2 to Feb 16Transplant outside: Mar 30 to Apr 13
Start indoors: Feb 16 to Mar 2Transplant outside: May 11 to May 25
Start indoors: Feb 16 to Mar 2Transplant outside: May 11 to May 25
Start indoors: Mar 2 to Mar 16Transplant outside: May 4 to May 18
Start indoors: Mar 2 to Mar 16Transplant outside: Apr 6 to Apr 20Sow outdoors: Mar 30 to May 4Plant for fall: Aug 24 to Sep 21
Start indoors: Mar 2 to Mar 16Transplant outside: Mar 30 to Apr 13Sow outdoors: Mar 30 to Apr 13Plant for fall: Aug 10 to Aug 31
Start indoors: Mar 2 to Mar 16Transplant outside: Apr 13 to Apr 27Plant for fall: Jul 13 to Aug 3
Start indoors: Mar 2 to Mar 16Transplant outside: Apr 6 to Apr 20Plant for fall: Jul 13 to Aug 3
Start indoors: Mar 2 to Mar 16Transplant outside: Apr 13 to Apr 27Plant for fall: Jul 13 to Aug 3
Start indoors: Mar 16 to Mar 30Transplant outside: May 18 to Jun 1Sow outdoors: May 18 to Jun 1
Start indoors: Mar 16 to Mar 30Transplant outside: May 4 to May 18
Sow outdoors: Mar 16 to Apr 6Plant for fall: Jul 27 to Aug 17
Sow outdoors: Mar 16 to Apr 6Plant for fall: Aug 24 to Sep 14
Sow outdoors: Mar 23 to May 4Plant for fall: Sep 7 to Sep 28
Start indoors: Mar 30 to Apr 6Transplant outside: May 11 to May 18Sow outdoors: May 4 to May 18Plant for fall: Aug 3 to Aug 17
Start indoors: Mar 30 to Apr 6Sow outdoors: May 4 to May 18Plant for fall: Aug 10 to Aug 24
Start indoors: Mar 30 to Apr 6Sow outdoors: May 4 to May 18
Start indoors: Mar 30 to Apr 6Transplant outside: May 11 to May 25
Sow outdoors: Apr 6 to May 4Plant for fall: Jul 27 to Aug 10
Sow outdoors: Apr 6 to May 4Plant for fall: Aug 10 to Aug 24
Sow outdoors: Apr 6 to Apr 27
Sow outdoors: Apr 13 to May 11Plant for fall: Aug 10 to Aug 24
Sow outdoors: Apr 13 to May 4Plant for fall: Aug 24 to Sep 14
Sow outdoors: May 4 to May 25Plant for fall: Aug 3 to Aug 17
Sow outdoors: May 4 to May 18
Transplant outside: May 11 to Jun 1
Plant for fall: Oct 5 to Nov 9
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Liberty, ME
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 2 – Feb 16 | Mar 30 – Apr 13 | — | — |
| Peppers | Feb 16 – Mar 2 | May 11 – May 25 | — | — |
| Eggplant | Feb 16 – Mar 2 | May 11 – May 25 | — | — |
| Tomatoes | Mar 2 – Mar 16 | May 4 – May 18 | — | — |
| Lettuce | Mar 2 – Mar 16 | Apr 6 – Apr 20 | Mar 30 – May 4 | Aug 24 – Sep 21 |
| Kale | Mar 2 – Mar 16 | Mar 30 – Apr 13 | Mar 30 – Apr 13 | Aug 10 – Aug 31 |
| Broccoli | Mar 2 – Mar 16 | Apr 13 – Apr 27 | — | Jul 13 – Aug 3 |
| Cabbage | Mar 2 – Mar 16 | Apr 6 – Apr 20 | — | Jul 13 – Aug 3 |
| Cauliflower | Mar 2 – Mar 16 | Apr 13 – Apr 27 | — | Jul 13 – Aug 3 |
| Okra | Mar 16 – Mar 30 | May 18 – Jun 1 | May 18 – Jun 1 | — |
| Basil | Mar 16 – Mar 30 | May 4 – May 18 | — | — |
| Peas | — | — | Mar 16 – Apr 6 | Jul 27 – Aug 17 |
| Spinach | — | — | Mar 16 – Apr 6 | Aug 24 – Sep 14 |
| Radishes | — | — | Mar 23 – May 4 | Sep 7 – Sep 28 |
| Cucumbers | Mar 30 – Apr 6 | May 11 – May 18 | May 4 – May 18 | Aug 3 – Aug 17 |
| Zucchini & Summer Squash | Mar 30 – Apr 6 | — | May 4 – May 18 | Aug 10 – Aug 24 |
| Winter Squash & Pumpkins | Mar 30 – Apr 6 | — | May 4 – May 18 | — |
| Melons & Watermelon | Mar 30 – Apr 6 | May 11 – May 25 | — | — |
| Carrots | — | — | Apr 6 – May 4 | Jul 27 – Aug 10 |
| Beets | — | — | Apr 6 – May 4 | Aug 10 – Aug 24 |
| Potatoes | — | — | Apr 6 – Apr 27 | — |
| Swiss Chard | — | — | Apr 13 – May 11 | Aug 10 – Aug 24 |
| Cilantro | — | — | Apr 13 – May 4 | Aug 24 – Sep 14 |
| Green Beans | — | — | May 4 – May 25 | Aug 3 – Aug 17 |
| Sweet Corn | — | — | May 4 – May 18 | — |
| Sweet Potatoes | — | May 11 – Jun 1 | — | — |
| Garlic | — | — | — | Oct 5 – Nov 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 W Rockport 1 Nnw, ME weather station, 25 km away (elevation 361 ft (110 m)).
Frost dates near Liberty
- Palermo May 2 · Oct 10
- Searsmont May 7 · Oct 5
- Freedom May 7 · Oct 5
- Washington Apr 27 · Oct 19
- Union Apr 27 · Oct 19
- Morrill May 7 · Oct 5
- Hope Apr 27 · Oct 19
- Lincolnville Center Apr 27 · Oct 19
- South China May 2 · Oct 10
- Albion May 2 · Oct 10
Frequently asked questions
When is the last frost in Liberty, ME?
The median last spring frost in Liberty, ME is April 27. There is still about a 10% chance of frost after May 9, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Liberty, ME?
The median first fall frost is October 19, with about a 10% chance of frost before October 5.
How long is the growing season in Liberty, ME?
About 175 days between the median last spring frost and first fall frost.
What planting zone is Liberty, ME?
Liberty, ME is in USDA hardiness zone 5b.