What Growing Zone Is South Fork?

Our records indicate the United States Department of Agriculture has given South Fork a growing zone designation of 5b. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in South Fork's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used South Fork's weather data from 1991 - 2020 in their analysis.

Latest CO growing zone map

If you are looking for plants suitable for growing in the South Fork area, head on over to our page on plants that grow well in South Fork, CO.

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Latest CO 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 South Fork is in growing zone 5b this means that plants there can survive temperatures as low as -15 to -10 degrees Fahrenheit. Plants for South Fork'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 South Fork 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 South Fork, CO.

The USDA hardiness zone is 5b for South Fork. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

South Fork's Growing Zone Details

USDA Growing Zone: 5b

Zip Codes: 81154

Longitude: -106.6417

Latitude: 37.6691

Lowest Avg Temperatures (F): -15 to -10

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Map of the South Fork Area

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