What Growing Zone Is Basalt?

Our records indicate the United States Department of Agriculture has given Basalt 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 Basalt's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Basalt'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 Basalt area, head on over to our page on plants that grow well in Basalt, CO.

Large Greenhouse Kit

Spacious greenhouse for extending your growing season.

Wooden Chicken Coop

Spacious and secure home for your backyard chickens.

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.

Fiskars Garden Harvest Basket

Sturdy basket for collecting and carrying your garden harvest.

Rustic Iron Garden Trellis

Sturdy trellis for supporting climbing plants and vines.

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

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

Basalt's Growing Zone Details

USDA Growing Zone: 6a

Zip Codes: 81621

Longitude: -107.0413

Latitude: 39.3663

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

Fiskars Garden Harvest Basket

Sturdy basket for collecting and carrying your garden harvest.

Rustic Iron Garden Trellis

Sturdy trellis for supporting climbing plants and vines.

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.

Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

Deluxe Plastic Watering Can

High-capacity watering can with comfortable grip and precise spout.

Map of the Basalt Area

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Seed Starting Trays

Perfect for starting seeds indoors before transplanting to your garden.

Reusable Grow Bags

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

Cluck Around Sign

Whimsical sign for your chicken coop area.

Shiitake Mushroom Kit

Grow your own delicious shiitake mushrooms at home.

Worm Composting Kit

Complete kit for starting your own worm composting system.

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.

Worm Composting Kit

Complete kit for starting your own worm composting system.

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Raised Garden Planter

Elevated planter for easy access and better drainage.

Rustic Iron Garden Trellis

Sturdy trellis for supporting climbing plants and vines.

Metal Seed Storage Box

Organized storage solution for your seed collection.

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