Frost dates for 06836 — Greenwich, CT
Last spring frostApr 12median date
First fall frostOct 31median date
Growing season202 daysfrost-free
Hardiness zone7aZone 7a
How Greenwich compares
- In 8 years out of 10, the last spring frost in Greenwich falls between April 1 and April 27, a 26-day window. The first fall frost falls between October 15 and November 14.
- The median last frost is 9 days earlier than the Connecticut median of Apr 21.
- Its 202-day growing season is longer than 90% of the 267 Connecticut places with a regular frost season (state median 178 days).
- The last frost is 4 days earlier than the zone 7a median of Apr 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7a chart.
- The weather station records an average of 105 nights a year at or below 32°F.
- Compared with Stamford, CT, 9 km away, the last frost here is 5 days earlier than there and the growing season is 13 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 1 |
| 50% (median) | April 12 |
| 10% (safe for tender plants) | April 27 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 15 |
| 50% (median) | October 31 |
| 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 Greenwich, CT
Frost dates for 06836 — Greenwich, CT — last frost Apr 12, first frost Oct 31, zone 7a. whenisthelastfrost.com
Crop
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Start indoors: Jan 18 to Feb 1Transplant outside: Mar 15 to Mar 29
Start indoors: Feb 1 to Feb 15Transplant outside: Apr 26 to May 10
Start indoors: Feb 1 to Feb 15Transplant outside: Apr 26 to May 10
Start indoors: Feb 15 to Mar 1Transplant outside: Apr 19 to May 3
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 22 to Apr 5Sow outdoors: Mar 15 to Apr 19Plant for fall: Sep 5 to Oct 3
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 15 to Mar 29Sow outdoors: Mar 15 to Mar 29Plant for fall: Aug 22 to Sep 12
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 29 to Apr 12Plant for fall: Jul 25 to Aug 15
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 22 to Apr 5Plant for fall: Jul 25 to Aug 15
Start indoors: Feb 15 to Mar 1Transplant outside: Mar 29 to Apr 12Plant for fall: Jul 25 to Aug 15
Start indoors: Mar 1 to Mar 15Transplant outside: May 3 to May 17Sow outdoors: May 3 to May 17
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 19 to May 3
Sow outdoors: Mar 1 to Mar 22Plant for fall: Aug 8 to Aug 29
Sow outdoors: Mar 1 to Mar 22Plant for fall: Sep 5 to Sep 26
Sow outdoors: Mar 8 to Apr 19Plant for fall: Sep 19 to Oct 10
Start indoors: Mar 15 to Mar 22Transplant outside: Apr 26 to May 3Sow outdoors: Apr 19 to May 3Plant for fall: Aug 15 to Aug 29
Start indoors: Mar 15 to Mar 22Sow outdoors: Apr 19 to May 3Plant for fall: Aug 22 to Sep 5
Start indoors: Mar 15 to Mar 22Sow outdoors: Apr 19 to May 3
Start indoors: Mar 15 to Mar 22Transplant outside: Apr 26 to May 10
Sow outdoors: Mar 22 to Apr 19Plant for fall: Aug 8 to Aug 22
Sow outdoors: Mar 22 to Apr 19Plant for fall: Aug 22 to Sep 5
Sow outdoors: Mar 22 to Apr 12
Sow outdoors: Mar 29 to Apr 26Plant for fall: Aug 22 to Sep 5
Sow outdoors: Mar 29 to Apr 19Plant for fall: Sep 5 to Sep 26
Sow outdoors: Apr 19 to May 10Plant for fall: Aug 15 to Aug 29
Sow outdoors: Apr 19 to May 3
Transplant outside: Apr 26 to May 17
Plant for fall: Oct 17 to Nov 21
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Greenwich, CT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 18 – Feb 1 | Mar 15 – Mar 29 | — | — |
| Peppers | Feb 1 – Feb 15 | Apr 26 – May 10 | — | — |
| Eggplant | Feb 1 – Feb 15 | Apr 26 – May 10 | — | — |
| Tomatoes | Feb 15 – Mar 1 | Apr 19 – May 3 | — | — |
| Lettuce | Feb 15 – Mar 1 | Mar 22 – Apr 5 | Mar 15 – Apr 19 | Sep 5 – Oct 3 |
| Kale | Feb 15 – Mar 1 | Mar 15 – Mar 29 | Mar 15 – Mar 29 | Aug 22 – Sep 12 |
| Broccoli | Feb 15 – Mar 1 | Mar 29 – Apr 12 | — | Jul 25 – Aug 15 |
| Cabbage | Feb 15 – Mar 1 | Mar 22 – Apr 5 | — | Jul 25 – Aug 15 |
| Cauliflower | Feb 15 – Mar 1 | Mar 29 – Apr 12 | — | Jul 25 – Aug 15 |
| Okra | Mar 1 – Mar 15 | May 3 – May 17 | May 3 – May 17 | — |
| Basil | Mar 1 – Mar 15 | Apr 19 – May 3 | — | — |
| Peas | — | — | Mar 1 – Mar 22 | Aug 8 – Aug 29 |
| Spinach | — | — | Mar 1 – Mar 22 | Sep 5 – Sep 26 |
| Radishes | — | — | Mar 8 – Apr 19 | Sep 19 – Oct 10 |
| Cucumbers | Mar 15 – Mar 22 | Apr 26 – May 3 | Apr 19 – May 3 | Aug 15 – Aug 29 |
| Zucchini & Summer Squash | Mar 15 – Mar 22 | — | Apr 19 – May 3 | Aug 22 – Sep 5 |
| Winter Squash & Pumpkins | Mar 15 – Mar 22 | — | Apr 19 – May 3 | — |
| Melons & Watermelon | Mar 15 – Mar 22 | Apr 26 – May 10 | — | — |
| Carrots | — | — | Mar 22 – Apr 19 | Aug 8 – Aug 22 |
| Beets | — | — | Mar 22 – Apr 19 | Aug 22 – Sep 5 |
| Potatoes | — | — | Mar 22 – Apr 12 | — |
| Swiss Chard | — | — | Mar 29 – Apr 26 | Aug 22 – Sep 5 |
| Cilantro | — | — | Mar 29 – Apr 19 | Sep 5 – Sep 26 |
| Green Beans | — | — | Apr 19 – May 10 | Aug 15 – Aug 29 |
| Sweet Corn | — | — | Apr 19 – May 3 | — |
| Sweet Potatoes | — | Apr 26 – May 17 | — | — |
| Garlic | — | — | — | Oct 17 – Nov 21 |
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 Westchester Co Ap, NY weather station, 8 km away (elevation 381 ft (116 m)).
ZIP codes in Greenwich: 06830 06831 06836
Frost dates near Greenwich
- Cos Cob Apr 17 · Oct 23
- Riverside Apr 17 · Oct 23
- Old Greenwich Apr 17 · Oct 23
- Stamford Apr 17 · Oct 23
- Darien Apr 17 · Oct 23
- New Canaan Apr 17 · Oct 23
- Norwalk Apr 17 · Oct 23
- Wilton Apr 17 · Oct 23
Frequently asked questions
When is the last frost in Greenwich, CT?
The median last spring frost in Greenwich, CT is April 12. There is still about a 10% chance of frost after April 27, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Greenwich, CT?
The median first fall frost is October 31, with about a 10% chance of frost before October 15.
How long is the growing season in Greenwich, CT?
About 202 days between the median last spring frost and first fall frost.
What planting zone is Greenwich, CT?
Greenwich, CT is in USDA hardiness zone 7a.