What Growing Zone Is Old Greenwich?

Our records indicate the United States Department of Agriculture has given Old Greenwich a growing zone designation of . Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Old Greenwich's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Old Greenwich's weather data from 1991 - 2020 in their analysis.

Latest CT growing zone map

If you are looking for plants suitable for growing in the Old Greenwich area, head on over to our page on plants that grow well in Old Greenwich, CT.

Metal Seed Storage Box

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Hydroponic Garden Grow Kit

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Small Greenhouse Kit

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Latest CT growing zone map

The growing zone is a measure of the lowest temperature that a plant can survive based on average lowest year temperatures, helping you to decide what plants would grow best in your particular climate. Since Old Greenwich is in growing zone this means that plants there can survive temperatures as low as degrees Fahrenheit. Plants for Old Greenwich's climate should be chosen with this in mind, or plants should be moved inside to keep their core temperature in the right range if necessary.

USDA growing zone map of the United States

Some zones may have been changed by the USDA as of 2023. To see if the Old Greenwich area has been affected, refer to this map of half zone changes from the 2012 version of the USDA zones to the 2023 version.

map of usda hardiness zone changes from 2012 to 2023

Half zone changes from 2012 to 2023

The updated map shows that over half of the Southeast has warmed by about half a zone. For gardeners, that means you can now grow plants that tolerate a bit more heat and less frost than before. The tan areas reflect this shift. Meanwhile, the white areas had slight temperature changes, but not enough to move them into a new zone. In the Western U.S., a few spots shifted cooler. That’s not due to a colder climate, but because the new map uses a larger dataset, giving a more accurate picture of local conditions. It's important to keep track of these changes when planning your garden!

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Hardiness Zone FAQ

Have questions about hardiness zones and what they mean for your garden? Check out our FAQ below for quick answers to common questions about USDA hardiness zones and how they affect plant selection in Old Greenwich, CT.

The USDA hardiness zone is null for Old Greenwich. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

Old Greenwich's Growing Zone Details

USDA Growing Zone:

Zip Codes: 6870

Longitude: -73.5692

Latitude: 41.0254

Lowest Avg Temperatures (F):

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Map of the Old Greenwich Area

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Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Metal Arbor Trellis

Decorative arbor trellis for climbing plants and garden entrance.

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

Cluck Around Sign

Whimsical sign for your chicken coop area.

Plants For Other States

Looking for the best plants in a different area of the United States? Click on a button below to find plants that are ideal for that state's temperatures.

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