Frost dates for 06879 — Ridgefield, CT
Last spring frostMay 1median date
First fall frostOct 14median date
Growing season166 daysfrost-free
Hardiness zone6bZone 6b
How Ridgefield compares
- In 8 years out of 10, the last spring frost in Ridgefield falls between April 18 and May 16, a 28-day window. The first fall frost falls between October 1 and October 29.
- The median last frost is 10 days later than the Connecticut median of Apr 21.
- Its 166-day growing season is longer than 17% of the 267 Connecticut places with a regular frost season (state median 178 days).
- The last frost is 9 days later than the zone 6b median of Apr 22. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6b chart.
- The weather station records an average of 134 nights a year at or below 32°F.
- Compared with Danbury, CT, 12 km away, the last frost here is 11 days later than there and the growing season is 17 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 18 |
| 50% (median) | May 1 |
| 10% (safe for tender plants) | May 16 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 1 |
| 50% (median) | October 14 |
| 90% (late) | October 29 |
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 Ridgefield, CT
Frost dates for 06879 — Ridgefield, CT — last frost May 1, first frost Oct 14, zone 6b. whenisthelastfrost.com
Crop
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Start indoors: Feb 6 to Feb 20Transplant outside: Apr 3 to Apr 17
Start indoors: Feb 20 to Mar 6Transplant outside: May 15 to May 29
Start indoors: Feb 20 to Mar 6Transplant outside: May 15 to May 29
Start indoors: Mar 6 to Mar 20Transplant outside: May 8 to May 22
Start indoors: Mar 6 to Mar 20Transplant outside: Apr 10 to Apr 24Sow outdoors: Apr 3 to May 8Plant for fall: Aug 19 to Sep 16
Start indoors: Mar 6 to Mar 20Transplant outside: Apr 3 to Apr 17Sow outdoors: Apr 3 to Apr 17Plant for fall: Aug 5 to Aug 26
Start indoors: Mar 6 to Mar 20Transplant outside: Apr 17 to May 1Plant for fall: Jul 8 to Jul 29
Start indoors: Mar 6 to Mar 20Transplant outside: Apr 10 to Apr 24Plant for fall: Jul 8 to Jul 29
Start indoors: Mar 6 to Mar 20Transplant outside: Apr 17 to May 1Plant for fall: Jul 8 to Jul 29
Start indoors: Mar 20 to Apr 3Transplant outside: May 22 to Jun 5Sow outdoors: May 22 to Jun 5
Start indoors: Mar 20 to Apr 3Transplant outside: May 8 to May 22
Sow outdoors: Mar 20 to Apr 10Plant for fall: Jul 22 to Aug 12
Sow outdoors: Mar 20 to Apr 10Plant for fall: Aug 19 to Sep 9
Sow outdoors: Mar 27 to May 8Plant for fall: Sep 2 to Sep 23
Start indoors: Apr 3 to Apr 10Transplant outside: May 15 to May 22Sow outdoors: May 8 to May 22Plant for fall: Jul 29 to Aug 12
Start indoors: Apr 3 to Apr 10Sow outdoors: May 8 to May 22Plant for fall: Aug 5 to Aug 19
Start indoors: Apr 3 to Apr 10Sow outdoors: May 8 to May 22
Start indoors: Apr 3 to Apr 10Transplant outside: May 15 to May 29
Sow outdoors: Apr 10 to May 8Plant for fall: Jul 22 to Aug 5
Sow outdoors: Apr 10 to May 8Plant for fall: Aug 5 to Aug 19
Sow outdoors: Apr 10 to May 1
Sow outdoors: Apr 17 to May 15Plant for fall: Aug 5 to Aug 19
Sow outdoors: Apr 17 to May 8Plant for fall: Aug 19 to Sep 9
Sow outdoors: May 8 to May 29Plant for fall: Jul 29 to Aug 12
Sow outdoors: May 8 to May 22
Transplant outside: May 15 to Jun 5
Plant for fall: Sep 30 to Nov 4
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Ridgefield, CT
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 6 – Feb 20 | Apr 3 – Apr 17 | — | — |
| Peppers | Feb 20 – Mar 6 | May 15 – May 29 | — | — |
| Eggplant | Feb 20 – Mar 6 | May 15 – May 29 | — | — |
| Tomatoes | Mar 6 – Mar 20 | May 8 – May 22 | — | — |
| Lettuce | Mar 6 – Mar 20 | Apr 10 – Apr 24 | Apr 3 – May 8 | Aug 19 – Sep 16 |
| Kale | Mar 6 – Mar 20 | Apr 3 – Apr 17 | Apr 3 – Apr 17 | Aug 5 – Aug 26 |
| Broccoli | Mar 6 – Mar 20 | Apr 17 – May 1 | — | Jul 8 – Jul 29 |
| Cabbage | Mar 6 – Mar 20 | Apr 10 – Apr 24 | — | Jul 8 – Jul 29 |
| Cauliflower | Mar 6 – Mar 20 | Apr 17 – May 1 | — | Jul 8 – Jul 29 |
| Okra | Mar 20 – Apr 3 | May 22 – Jun 5 | May 22 – Jun 5 | — |
| Basil | Mar 20 – Apr 3 | May 8 – May 22 | — | — |
| Peas | — | — | Mar 20 – Apr 10 | Jul 22 – Aug 12 |
| Spinach | — | — | Mar 20 – Apr 10 | Aug 19 – Sep 9 |
| Radishes | — | — | Mar 27 – May 8 | Sep 2 – Sep 23 |
| Cucumbers | Apr 3 – Apr 10 | May 15 – May 22 | May 8 – May 22 | Jul 29 – Aug 12 |
| Zucchini & Summer Squash | Apr 3 – Apr 10 | — | May 8 – May 22 | Aug 5 – Aug 19 |
| Winter Squash & Pumpkins | Apr 3 – Apr 10 | — | May 8 – May 22 | — |
| Melons & Watermelon | Apr 3 – Apr 10 | May 15 – May 29 | — | — |
| Carrots | — | — | Apr 10 – May 8 | Jul 22 – Aug 5 |
| Beets | — | — | Apr 10 – May 8 | Aug 5 – Aug 19 |
| Potatoes | — | — | Apr 10 – May 1 | — |
| Swiss Chard | — | — | Apr 17 – May 15 | Aug 5 – Aug 19 |
| Cilantro | — | — | Apr 17 – May 8 | Aug 19 – Sep 9 |
| Green Beans | — | — | May 8 – May 29 | Jul 29 – Aug 12 |
| Sweet Corn | — | — | May 8 – May 22 | — |
| Sweet Potatoes | — | May 15 – Jun 5 | — | — |
| Garlic | — | — | — | Sep 30 – Nov 4 |
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 Danbury Muni Ap, CT weather station, 10 km away (elevation 456 ft (139 m)).
ZIP codes in Ridgefield: 06877 06879
Frost dates near Ridgefield
- Georgetown May 1 · Oct 14
- Redding May 1 · Oct 14
- Wilton Apr 17 · Oct 23
- Danbury Apr 20 · Oct 20
- Redding Center Apr 20 · Oct 20
- Weston Apr 17 · Oct 23
- Redding Ridge Apr 20 · Oct 20
- Bethel Apr 20 · Oct 20
Frequently asked questions
When is the last frost in Ridgefield, CT?
The median last spring frost in Ridgefield, CT is May 1. There is still about a 10% chance of frost after May 16, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Ridgefield, CT?
The median first fall frost is October 14, with about a 10% chance of frost before October 1.
How long is the growing season in Ridgefield, CT?
About 166 days between the median last spring frost and first fall frost.
What planting zone is Ridgefield, CT?
Ridgefield, CT is in USDA hardiness zone 6b.