Humarock, MA frost dates
Last spring frostApr 15median date
First fall frostNov 1median date
Growing season200 daysfrost-free
Hardiness zone7aZone 7a
How Humarock compares
- In 8 years out of 10, the last spring frost in Humarock falls between April 2 and April 28, a 26-day window. The first fall frost falls between October 17 and November 14.
- The median last frost is 12 days earlier than the Massachusetts median of Apr 27.
- Its 200-day growing season is longer than 87% of the 510 Massachusetts places with a regular frost season (state median 169 days).
- The last frost is typical for zone 7a, where the median is Apr 16.
- The weather station records an average of 120 nights a year at or below 32°F.
- Compared with Weymouth, MA, 23 km away, the last frost here is 10 days earlier than there and the growing season is 20 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 2 |
| 50% (median) | April 15 |
| 10% (safe for tender plants) | April 28 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 17 |
| 50% (median) | November 1 |
| 90% (late) | November 14 |
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 Humarock, MA
Humarock, MA frost dates — last frost Apr 15, first frost Nov 1, zone 7a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Jan 21 to Feb 4Transplant outside: Mar 18 to Apr 1
Start indoors: Feb 4 to Feb 18Transplant outside: Apr 29 to May 13
Start indoors: Feb 4 to Feb 18Transplant outside: Apr 29 to May 13
Start indoors: Feb 18 to Mar 4Transplant outside: Apr 22 to May 6
Start indoors: Feb 18 to Mar 4Transplant outside: Mar 25 to Apr 8Sow outdoors: Mar 18 to Apr 22Plant for fall: Sep 6 to Oct 4
Start indoors: Feb 18 to Mar 4Transplant outside: Mar 18 to Apr 1Sow outdoors: Mar 18 to Apr 1Plant for fall: Aug 23 to Sep 13
Start indoors: Feb 18 to Mar 4Transplant outside: Apr 1 to Apr 15Plant for fall: Jul 26 to Aug 16
Start indoors: Feb 18 to Mar 4Transplant outside: Mar 25 to Apr 8Plant for fall: Jul 26 to Aug 16
Start indoors: Feb 18 to Mar 4Transplant outside: Apr 1 to Apr 15Plant for fall: Jul 26 to Aug 16
Start indoors: Mar 4 to Mar 18Transplant outside: May 6 to May 20Sow outdoors: May 6 to May 20
Start indoors: Mar 4 to Mar 18Transplant outside: Apr 22 to May 6
Sow outdoors: Mar 4 to Mar 25Plant for fall: Aug 9 to Aug 30
Sow outdoors: Mar 4 to Mar 25Plant for fall: Sep 6 to Sep 27
Sow outdoors: Mar 11 to Apr 22Plant for fall: Sep 20 to Oct 11
Start indoors: Mar 18 to Mar 25Transplant outside: Apr 29 to May 6Sow outdoors: Apr 22 to May 6Plant for fall: Aug 16 to Aug 30
Start indoors: Mar 18 to Mar 25Sow outdoors: Apr 22 to May 6Plant for fall: Aug 23 to Sep 6
Start indoors: Mar 18 to Mar 25Sow outdoors: Apr 22 to May 6
Start indoors: Mar 18 to Mar 25Transplant outside: Apr 29 to May 13
Sow outdoors: Mar 25 to Apr 22Plant for fall: Aug 9 to Aug 23
Sow outdoors: Mar 25 to Apr 22Plant for fall: Aug 23 to Sep 6
Sow outdoors: Mar 25 to Apr 15
Sow outdoors: Apr 1 to Apr 29Plant for fall: Aug 23 to Sep 6
Sow outdoors: Apr 1 to Apr 22Plant for fall: Sep 6 to Sep 27
Sow outdoors: Apr 22 to May 13Plant for fall: Aug 16 to Aug 30
Sow outdoors: Apr 22 to May 6
Transplant outside: Apr 29 to May 20
Plant for fall: Oct 18 to Nov 22
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Humarock, MA
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 21 – Feb 4 | Mar 18 – Apr 1 | — | — |
| Peppers | Feb 4 – Feb 18 | Apr 29 – May 13 | — | — |
| Eggplant | Feb 4 – Feb 18 | Apr 29 – May 13 | — | — |
| Tomatoes | Feb 18 – Mar 4 | Apr 22 – May 6 | — | — |
| Lettuce | Feb 18 – Mar 4 | Mar 25 – Apr 8 | Mar 18 – Apr 22 | Sep 6 – Oct 4 |
| Kale | Feb 18 – Mar 4 | Mar 18 – Apr 1 | Mar 18 – Apr 1 | Aug 23 – Sep 13 |
| Broccoli | Feb 18 – Mar 4 | Apr 1 – Apr 15 | — | Jul 26 – Aug 16 |
| Cabbage | Feb 18 – Mar 4 | Mar 25 – Apr 8 | — | Jul 26 – Aug 16 |
| Cauliflower | Feb 18 – Mar 4 | Apr 1 – Apr 15 | — | Jul 26 – Aug 16 |
| Okra | Mar 4 – Mar 18 | May 6 – May 20 | May 6 – May 20 | — |
| Basil | Mar 4 – Mar 18 | Apr 22 – May 6 | — | — |
| Peas | — | — | Mar 4 – Mar 25 | Aug 9 – Aug 30 |
| Spinach | — | — | Mar 4 – Mar 25 | Sep 6 – Sep 27 |
| Radishes | — | — | Mar 11 – Apr 22 | Sep 20 – Oct 11 |
| Cucumbers | Mar 18 – Mar 25 | Apr 29 – May 6 | Apr 22 – May 6 | Aug 16 – Aug 30 |
| Zucchini & Summer Squash | Mar 18 – Mar 25 | — | Apr 22 – May 6 | Aug 23 – Sep 6 |
| Winter Squash & Pumpkins | Mar 18 – Mar 25 | — | Apr 22 – May 6 | — |
| Melons & Watermelon | Mar 18 – Mar 25 | Apr 29 – May 13 | — | — |
| Carrots | — | — | Mar 25 – Apr 22 | Aug 9 – Aug 23 |
| Beets | — | — | Mar 25 – Apr 22 | Aug 23 – Sep 6 |
| Potatoes | — | — | Mar 25 – Apr 15 | — |
| Swiss Chard | — | — | Apr 1 – Apr 29 | Aug 23 – Sep 6 |
| Cilantro | — | — | Apr 1 – Apr 22 | Sep 6 – Sep 27 |
| Green Beans | — | — | Apr 22 – May 13 | Aug 16 – Aug 30 |
| Sweet Corn | — | — | Apr 22 – May 6 | — |
| Sweet Potatoes | — | Apr 29 – May 20 | — | — |
| Garlic | — | — | — | Oct 18 – Nov 22 |
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-Kingston, MA weather station, 18 km away (elevation 46 ft (14 m)).
Frost dates near Humarock
- Marshfield Hills Apr 25 · Oct 22
- Marshfield Apr 15 · Nov 1
- Greenbush Apr 25 · Oct 22
- Ocean Bluff Apr 15 · Nov 1
- North Marshfield Apr 25 · Oct 22
- Brant Rock Apr 15 · Nov 1
- Scituate Apr 25 · Oct 22
- Green Harbor Apr 15 · Nov 1
- North Pembroke Apr 15 · Nov 1
- Norwell Apr 25 · Oct 22
Frequently asked questions
When is the last frost in Humarock, MA?
The median last spring frost in Humarock, MA is April 15. There is still about a 10% chance of frost after April 28, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Humarock, MA?
The median first fall frost is November 1, with about a 10% chance of frost before October 17.
How long is the growing season in Humarock, MA?
About 200 days between the median last spring frost and first fall frost.
What planting zone is Humarock, MA?
Humarock, MA is in USDA hardiness zone 7a.