South Tamworth, NH frost dates
Last spring frostMay 6median date
First fall frostOct 6median date
Growing season153 daysfrost-free
Hardiness zone5aZone 5a
How South Tamworth compares
- In 8 years out of 10, the last spring frost in South Tamworth falls between April 26 and May 19, a 23-day window. The first fall frost falls between September 24 and October 19.
- The median last frost is 1 day earlier than the New Hampshire median of May 7.
- Its 153-day growing season is longer than 60% of the 252 New Hampshire places with a regular frost season (state median 150 days).
- The last frost is typical for zone 5a, where the median is May 3.
- The weather station records an average of 173 nights a year at or below 32°F.
- Compared with Portland, ME, 86 km away, the last frost here is 10 days later than there and the growing season is 19 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 26 |
| 50% (median) | May 6 |
| 10% (safe for tender plants) | May 19 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 24 |
| 50% (median) | October 6 |
| 90% (late) | October 19 |
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 South Tamworth, NH
South Tamworth, NH frost dates — last frost May 6, first frost Oct 6, zone 5a. whenisthelastfrost.com
Crop
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Start indoors: Feb 11 to Feb 25Transplant outside: Apr 8 to Apr 22
Start indoors: Feb 25 to Mar 11Transplant outside: May 20 to Jun 3
Start indoors: Feb 25 to Mar 11Transplant outside: May 20 to Jun 3
Start indoors: Mar 11 to Mar 25Transplant outside: May 13 to May 27
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 15 to Apr 29Sow outdoors: Apr 8 to May 13Plant for fall: Aug 11 to Sep 8
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 8 to Apr 22Sow outdoors: Apr 8 to Apr 22Plant for fall: Jul 28 to Aug 18
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 22 to May 6Plant for fall: Jun 30 to Jul 21
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 15 to Apr 29Plant for fall: Jun 30 to Jul 21
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 22 to May 6Plant for fall: Jun 30 to Jul 21
Start indoors: Mar 25 to Apr 8Transplant outside: May 27 to Jun 10Sow outdoors: May 27 to Jun 10
Start indoors: Mar 25 to Apr 8Transplant outside: May 13 to May 27
Sow outdoors: Mar 25 to Apr 15Plant for fall: Jul 14 to Aug 4
Sow outdoors: Mar 25 to Apr 15Plant for fall: Aug 11 to Sep 1
Sow outdoors: Apr 1 to May 13Plant for fall: Aug 25 to Sep 15
Start indoors: Apr 8 to Apr 15Transplant outside: May 20 to May 27Sow outdoors: May 13 to May 27Plant for fall: Jul 21 to Aug 4
Start indoors: Apr 8 to Apr 15Sow outdoors: May 13 to May 27Plant for fall: Jul 28 to Aug 11
Start indoors: Apr 8 to Apr 15Sow outdoors: May 13 to May 27
Start indoors: Apr 8 to Apr 15Transplant outside: May 20 to Jun 3
Sow outdoors: Apr 15 to May 13Plant for fall: Jul 14 to Jul 28
Sow outdoors: Apr 15 to May 13Plant for fall: Jul 28 to Aug 11
Sow outdoors: Apr 15 to May 6
Sow outdoors: Apr 22 to May 20Plant for fall: Jul 28 to Aug 11
Sow outdoors: Apr 22 to May 13Plant for fall: Aug 11 to Sep 1
Sow outdoors: May 13 to Jun 3Plant for fall: Jul 21 to Aug 4
Sow outdoors: May 13 to May 27
Transplant outside: May 20 to Jun 10
Plant for fall: Sep 22 to Oct 27
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in South Tamworth, NH
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 11 – Feb 25 | Apr 8 – Apr 22 | — | — |
| Peppers | Feb 25 – Mar 11 | May 20 – Jun 3 | — | — |
| Eggplant | Feb 25 – Mar 11 | May 20 – Jun 3 | — | — |
| Tomatoes | Mar 11 – Mar 25 | May 13 – May 27 | — | — |
| Lettuce | Mar 11 – Mar 25 | Apr 15 – Apr 29 | Apr 8 – May 13 | Aug 11 – Sep 8 |
| Kale | Mar 11 – Mar 25 | Apr 8 – Apr 22 | Apr 8 – Apr 22 | Jul 28 – Aug 18 |
| Broccoli | Mar 11 – Mar 25 | Apr 22 – May 6 | — | Jun 30 – Jul 21 |
| Cabbage | Mar 11 – Mar 25 | Apr 15 – Apr 29 | — | Jun 30 – Jul 21 |
| Cauliflower | Mar 11 – Mar 25 | Apr 22 – May 6 | — | Jun 30 – Jul 21 |
| Okra | Mar 25 – Apr 8 | May 27 – Jun 10 | May 27 – Jun 10 | — |
| Basil | Mar 25 – Apr 8 | May 13 – May 27 | — | — |
| Peas | — | — | Mar 25 – Apr 15 | Jul 14 – Aug 4 |
| Spinach | — | — | Mar 25 – Apr 15 | Aug 11 – Sep 1 |
| Radishes | — | — | Apr 1 – May 13 | Aug 25 – Sep 15 |
| Cucumbers | Apr 8 – Apr 15 | May 20 – May 27 | May 13 – May 27 | Jul 21 – Aug 4 |
| Zucchini & Summer Squash | Apr 8 – Apr 15 | — | May 13 – May 27 | Jul 28 – Aug 11 |
| Winter Squash & Pumpkins | Apr 8 – Apr 15 | — | May 13 – May 27 | — |
| Melons & Watermelon | Apr 8 – Apr 15 | May 20 – Jun 3 | — | — |
| Carrots | — | — | Apr 15 – May 13 | Jul 14 – Jul 28 |
| Beets | — | — | Apr 15 – May 13 | Jul 28 – Aug 11 |
| Potatoes | — | — | Apr 15 – May 6 | — |
| Swiss Chard | — | — | Apr 22 – May 20 | Jul 28 – Aug 11 |
| Cilantro | — | — | Apr 22 – May 13 | Aug 11 – Sep 1 |
| Green Beans | — | — | May 13 – Jun 3 | Jul 21 – Aug 4 |
| Sweet Corn | — | — | May 13 – May 27 | — |
| Sweet Potatoes | — | May 20 – Jun 10 | — | — |
| Garlic | — | — | — | Sep 22 – Oct 27 |
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 E Sandwich, NH weather station, 3 km away (elevation 692 ft (211 m)).
Frost dates near South Tamworth
- Tamworth May 16 · Sep 26
- North Sandwich May 6 · Oct 6
- West Ossipee May 16 · Sep 26
- Chocorua May 16 · Sep 26
- Melvin Village May 6 · Oct 6
- Moultonborough Apr 28 · Oct 16
- Center Sandwich May 6 · Oct 6
- Wonalancet May 16 · Sep 26
- Silver Lake May 16 · Sep 26
- Center Tuftonboro May 6 · Oct 6
Frequently asked questions
When is the last frost in South Tamworth, NH?
The median last spring frost in South Tamworth, NH is May 6. There is still about a 10% chance of frost after May 19, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in South Tamworth, NH?
The median first fall frost is October 6, with about a 10% chance of frost before September 24.
How long is the growing season in South Tamworth, NH?
About 153 days between the median last spring frost and first fall frost.
What planting zone is South Tamworth, NH?
South Tamworth, NH is in USDA hardiness zone 5a.