What Growing Zone Is Libby?

Our records indicate the United States Department of Agriculture has given Libby a growing zone designation of 6a. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Libby's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Libby's weather data from 1991 - 2020 in their analysis.

Latest MT growing zone map

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

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Cluck Around Sign

Whimsical sign for your chicken coop area.

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Latest MT 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 Libby is in growing zone 6a this means that plants there can survive temperatures as low as -10 to -5 degrees Fahrenheit. Plants for Libby'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 Libby 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 Libby, MT.

The USDA hardiness zone is 6a for Libby. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.

Libby's Growing Zone Details

USDA Growing Zone: 6a

Zip Codes: 59923

Longitude: -115.5559

Latitude: 48.387

Lowest Avg Temperatures (F): -10 to -5

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Wooden Chicken Coop

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Reusable Grow Bags

Breathable fabric grow bags that promote healthy root growth for your vegetables and fruits.

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Hoeing Ain't Easy Garden Sign

Fun and decorative garden sign to add personality to your space.

Map of the Libby Area

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Worm Composting Kit

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Hydroponic Garden Grow Kit

Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Raised Garden Bed Kit

Easy-to-assemble raised garden bed for better soil control and drainage.

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Spacious greenhouse for extending your growing season.

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.

Cluck Around Sign

Whimsical sign for your chicken coop area.

Raised Garden Planter

Elevated planter for easy access and better drainage.

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.

Hoeing Ain't Easy Garden Sign

Fun and decorative garden sign to add personality to your space.

Brass Watering Can

Elegant brass watering can with classic design and durability.

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