Lyndeborough, NH frost dates
Last spring frostMay 3median date
First fall frostOct 5median date
Growing season155 daysfrost-free
Hardiness zone6aZone 6a
How Lyndeborough compares
- In 8 years out of 10, the last spring frost in Lyndeborough falls between April 22 and May 15, a 23-day window. The first fall frost falls between September 25 and October 18.
- The median last frost is 4 days earlier than the New Hampshire median of May 7.
- Its 155-day growing season is longer than 65% of the 252 New Hampshire places with a regular frost season (state median 150 days).
- The last frost is 4 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 159 nights a year at or below 32°F.
- Compared with Manchester, NH, 28 km away, the last frost here is 3 days later than there and the growing season is 9 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 22 |
| 50% (median) | May 3 |
| 10% (safe for tender plants) | May 15 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 25 |
| 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 Lyndeborough, NH
Lyndeborough, NH frost dates — last frost May 3, first frost Oct 5, zone 6a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Feb 8 to Feb 22Transplant outside: Apr 5 to Apr 19
Start indoors: Feb 22 to Mar 8Transplant outside: May 17 to May 31
Start indoors: Feb 22 to Mar 8Transplant outside: May 17 to May 31
Start indoors: Mar 8 to Mar 22Transplant outside: May 10 to May 24
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 12 to Apr 26Sow outdoors: Apr 5 to May 10Plant for fall: Aug 10 to Sep 7
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 5 to Apr 19Sow outdoors: Apr 5 to Apr 19Plant for fall: Jul 27 to Aug 17
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 19 to May 3Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 12 to Apr 26Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 8 to Mar 22Transplant outside: Apr 19 to May 3Plant for fall: Jun 29 to Jul 20
Start indoors: Mar 22 to Apr 5Transplant outside: May 24 to Jun 7Sow outdoors: May 24 to Jun 7
Start indoors: Mar 22 to Apr 5Transplant outside: May 10 to May 24
Sow outdoors: Mar 22 to Apr 12Plant for fall: Jul 13 to Aug 3
Sow outdoors: Mar 22 to Apr 12Plant for fall: Aug 10 to Aug 31
Sow outdoors: Mar 29 to May 10Plant for fall: Aug 24 to Sep 14
Start indoors: Apr 5 to Apr 12Transplant outside: May 17 to May 24Sow outdoors: May 10 to May 24Plant for fall: Jul 20 to Aug 3
Start indoors: Apr 5 to Apr 12Sow outdoors: May 10 to May 24Plant for fall: Jul 27 to Aug 10
Start indoors: Apr 5 to Apr 12Sow outdoors: May 10 to May 24
Start indoors: Apr 5 to Apr 12Transplant outside: May 17 to May 31
Sow outdoors: Apr 12 to May 10Plant for fall: Jul 13 to Jul 27
Sow outdoors: Apr 12 to May 10Plant for fall: Jul 27 to Aug 10
Sow outdoors: Apr 12 to May 3
Sow outdoors: Apr 19 to May 17Plant for fall: Jul 27 to Aug 10
Sow outdoors: Apr 19 to May 10Plant for fall: Aug 10 to Aug 31
Sow outdoors: May 10 to May 31Plant for fall: Jul 20 to Aug 3
Sow outdoors: May 10 to May 24
Transplant outside: May 17 to Jun 7
Plant for fall: Sep 21 to Oct 26
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Lyndeborough, NH
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 8 – Feb 22 | Apr 5 – Apr 19 | — | — |
| Peppers | Feb 22 – Mar 8 | May 17 – May 31 | — | — |
| Eggplant | Feb 22 – Mar 8 | May 17 – May 31 | — | — |
| Tomatoes | Mar 8 – Mar 22 | May 10 – May 24 | — | — |
| Lettuce | Mar 8 – Mar 22 | Apr 12 – Apr 26 | Apr 5 – May 10 | Aug 10 – Sep 7 |
| Kale | Mar 8 – Mar 22 | Apr 5 – Apr 19 | Apr 5 – Apr 19 | Jul 27 – Aug 17 |
| Broccoli | Mar 8 – Mar 22 | Apr 19 – May 3 | — | Jun 29 – Jul 20 |
| Cabbage | Mar 8 – Mar 22 | Apr 12 – Apr 26 | — | Jun 29 – Jul 20 |
| Cauliflower | Mar 8 – Mar 22 | Apr 19 – May 3 | — | Jun 29 – Jul 20 |
| Okra | Mar 22 – Apr 5 | May 24 – Jun 7 | May 24 – Jun 7 | — |
| Basil | Mar 22 – Apr 5 | May 10 – May 24 | — | — |
| Peas | — | — | Mar 22 – Apr 12 | Jul 13 – Aug 3 |
| Spinach | — | — | Mar 22 – Apr 12 | Aug 10 – Aug 31 |
| Radishes | — | — | Mar 29 – May 10 | Aug 24 – Sep 14 |
| Cucumbers | Apr 5 – Apr 12 | May 17 – May 24 | May 10 – May 24 | Jul 20 – Aug 3 |
| Zucchini & Summer Squash | Apr 5 – Apr 12 | — | May 10 – May 24 | Jul 27 – Aug 10 |
| Winter Squash & Pumpkins | Apr 5 – Apr 12 | — | May 10 – May 24 | — |
| Melons & Watermelon | Apr 5 – Apr 12 | May 17 – May 31 | — | — |
| Carrots | — | — | Apr 12 – May 10 | Jul 13 – Jul 27 |
| Beets | — | — | Apr 12 – May 10 | Jul 27 – Aug 10 |
| Potatoes | — | — | Apr 12 – May 3 | — |
| Swiss Chard | — | — | Apr 19 – May 17 | Jul 27 – Aug 10 |
| Cilantro | — | — | Apr 19 – May 10 | Aug 10 – Aug 31 |
| Green Beans | — | — | May 10 – May 31 | Jul 20 – Aug 3 |
| Sweet Corn | — | — | May 10 – May 24 | — |
| Sweet Potatoes | — | May 17 – Jun 7 | — | — |
| 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 Milford, NH weather station, 12 km away (elevation 322 ft (98 m)).
Frost dates near Lyndeborough
- Wilton May 10 · Oct 6
- Mont Vernon May 3 · Oct 5
- Greenfield May 2 · Oct 8
- Temple May 10 · Oct 6
- New Boston May 2 · Oct 8
- Francestown May 2 · Oct 8
- Milford May 3 · Oct 5
- West Peterborough May 5 · Oct 6
- Peterborough May 5 · Oct 6
- Amherst Apr 28 · Oct 8
Frequently asked questions
When is the last frost in Lyndeborough, NH?
The median last spring frost in Lyndeborough, NH is May 3. There is still about a 10% chance of frost after May 15, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Lyndeborough, NH?
The median first fall frost is October 5, with about a 10% chance of frost before September 25.
How long is the growing season in Lyndeborough, NH?
About 155 days between the median last spring frost and first fall frost.
What planting zone is Lyndeborough, NH?
Lyndeborough, NH is in USDA hardiness zone 6a.