Hebron, NH frost dates
Last spring frostMay 20median date
First fall frostSep 27median date
Growing season130 daysfrost-free
Hardiness zone5bZone 5b
How Hebron compares
- In 8 years out of 10, the last spring frost in Hebron falls between May 6 and June 4, a 29-day window. The first fall frost falls between September 14 and October 7.
- The median last frost is 13 days later than the New Hampshire median of May 7.
- Its 130-day growing season is longer than 7% of the 252 New Hampshire places with a regular frost season (state median 150 days).
- The last frost is 19 days later 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 196 nights a year at or below 32°F.
- Compared with Manchester, NH, 87 km away, the last frost here is 20 days later than there and the growing season is 34 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 6 |
| 50% (median) | May 20 |
| 10% (safe for tender plants) | June 4 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 14 |
| 50% (median) | September 27 |
| 90% (late) | October 7 |
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 Hebron, NH
Hebron, NH frost dates — last frost May 20, first frost Sep 27, zone 5b. whenisthelastfrost.com
Crop
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Start indoors: Feb 25 to Mar 11Transplant outside: Apr 22 to May 6
Start indoors: Mar 11 to Mar 25Transplant outside: Jun 3 to Jun 17
Start indoors: Mar 11 to Mar 25Transplant outside: Jun 3 to Jun 17
Start indoors: Mar 25 to Apr 8Transplant outside: May 27 to Jun 10
Start indoors: Mar 25 to Apr 8Transplant outside: Apr 29 to May 13Sow outdoors: Apr 22 to May 27Plant for fall: Aug 2 to Aug 30
Start indoors: Mar 25 to Apr 8Transplant outside: Apr 22 to May 6Sow outdoors: Apr 22 to May 6Plant for fall: Jul 19 to Aug 9
Start indoors: Mar 25 to Apr 8Transplant outside: May 6 to May 20Plant for fall: Jun 21 to Jul 12
Start indoors: Mar 25 to Apr 8Transplant outside: Apr 29 to May 13Plant for fall: Jun 21 to Jul 12
Start indoors: Mar 25 to Apr 8Transplant outside: May 6 to May 20Plant for fall: Jun 21 to Jul 12
Start indoors: Apr 8 to Apr 22Transplant outside: Jun 10 to Jun 24Sow outdoors: Jun 10 to Jun 24
Start indoors: Apr 8 to Apr 22Transplant outside: May 27 to Jun 10
Sow outdoors: Apr 8 to Apr 29Plant for fall: Jul 5 to Jul 26
Sow outdoors: Apr 8 to Apr 29Plant for fall: Aug 2 to Aug 23
Sow outdoors: Apr 15 to May 27Plant for fall: Aug 16 to Sep 6
Start indoors: Apr 22 to Apr 29Transplant outside: Jun 3 to Jun 10Sow outdoors: May 27 to Jun 10Plant for fall: Jul 12 to Jul 26
Start indoors: Apr 22 to Apr 29Sow outdoors: May 27 to Jun 10Plant for fall: Jul 19 to Aug 2
Start indoors: Apr 22 to Apr 29Sow outdoors: May 27 to Jun 10
Start indoors: Apr 22 to Apr 29Transplant outside: Jun 3 to Jun 17
Sow outdoors: Apr 29 to May 27Plant for fall: Jul 5 to Jul 19
Sow outdoors: Apr 29 to May 27Plant for fall: Jul 19 to Aug 2
Sow outdoors: Apr 29 to May 20
Sow outdoors: May 6 to Jun 3Plant for fall: Jul 19 to Aug 2
Sow outdoors: May 6 to May 27Plant for fall: Aug 2 to Aug 23
Sow outdoors: May 27 to Jun 17Plant for fall: Jul 12 to Jul 26
Sow outdoors: May 27 to Jun 10
Transplant outside: Jun 3 to Jun 24
Plant for fall: Sep 13 to Oct 18
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Hebron, NH
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 25 – Mar 11 | Apr 22 – May 6 | — | — |
| Peppers | Mar 11 – Mar 25 | Jun 3 – Jun 17 | — | — |
| Eggplant | Mar 11 – Mar 25 | Jun 3 – Jun 17 | — | — |
| Tomatoes | Mar 25 – Apr 8 | May 27 – Jun 10 | — | — |
| Lettuce | Mar 25 – Apr 8 | Apr 29 – May 13 | Apr 22 – May 27 | Aug 2 – Aug 30 |
| Kale | Mar 25 – Apr 8 | Apr 22 – May 6 | Apr 22 – May 6 | Jul 19 – Aug 9 |
| Broccoli | Mar 25 – Apr 8 | May 6 – May 20 | — | Jun 21 – Jul 12 |
| Cabbage | Mar 25 – Apr 8 | Apr 29 – May 13 | — | Jun 21 – Jul 12 |
| Cauliflower | Mar 25 – Apr 8 | May 6 – May 20 | — | Jun 21 – Jul 12 |
| Okra | Apr 8 – Apr 22 | Jun 10 – Jun 24 | Jun 10 – Jun 24 | — |
| Basil | Apr 8 – Apr 22 | May 27 – Jun 10 | — | — |
| Peas | — | — | Apr 8 – Apr 29 | Jul 5 – Jul 26 |
| Spinach | — | — | Apr 8 – Apr 29 | Aug 2 – Aug 23 |
| Radishes | — | — | Apr 15 – May 27 | Aug 16 – Sep 6 |
| Cucumbers | Apr 22 – Apr 29 | Jun 3 – Jun 10 | May 27 – Jun 10 | Jul 12 – Jul 26 |
| Zucchini & Summer Squash | Apr 22 – Apr 29 | — | May 27 – Jun 10 | Jul 19 – Aug 2 |
| Winter Squash & Pumpkins | Apr 22 – Apr 29 | — | May 27 – Jun 10 | — |
| Melons & Watermelon | Apr 22 – Apr 29 | Jun 3 – Jun 17 | — | — |
| Carrots | — | — | Apr 29 – May 27 | Jul 5 – Jul 19 |
| Beets | — | — | Apr 29 – May 27 | Jul 19 – Aug 2 |
| Potatoes | — | — | Apr 29 – May 20 | — |
| Swiss Chard | — | — | May 6 – Jun 3 | Jul 19 – Aug 2 |
| Cilantro | — | — | May 6 – May 27 | Aug 2 – Aug 23 |
| Green Beans | — | — | May 27 – Jun 17 | Jul 12 – Jul 26 |
| Sweet Corn | — | — | May 27 – Jun 10 | — |
| Sweet Potatoes | — | Jun 3 – Jun 24 | — | — |
| Garlic | — | — | — | Sep 13 – Oct 18 |
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 Plymouth, NH weather station, 16 km away (elevation 659 ft (201 m)).
Frost dates near Hebron
- Rumney May 12 · Oct 6
- Plymouth May 20 · Sep 27
- Bristol May 21 · Sep 26
- Ashland May 20 · Sep 27
- Canaan May 21 · Sep 26
- Wentworth May 12 · Oct 6
- Holderness May 20 · Sep 27
- New Hampton Apr 28 · Oct 16
- Campton May 20 · Sep 27
- Grafton May 21 · Sep 26
Frequently asked questions
When is the last frost in Hebron, NH?
The median last spring frost in Hebron, NH is May 20. There is still about a 10% chance of frost after June 4, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Hebron, NH?
The median first fall frost is September 27, with about a 10% chance of frost before September 14.
How long is the growing season in Hebron, NH?
About 130 days between the median last spring frost and first fall frost.
What planting zone is Hebron, NH?
Hebron, NH is in USDA hardiness zone 5b.