What Growing Zone Is Knife River?
Our records indicate the United States Department of Agriculture has given Knife River a growing zone designation of 4b. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Knife River's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Knife River's weather data from 1991 - 2020 in their analysis.
Latest MN growing zone mapIf you are looking for plants suitable for growing in the Knife River area, head on over to our page on plants that grow well in Knife River, MN.
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Versatile Japanese-style gardening knife for weeding and planting.
Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
Fiskars Garden Harvest Basket
Sturdy basket for collecting and carrying your garden harvest.
Seed Starting Trays
Perfect for starting seeds indoors before transplanting to your garden.
Worm Composting Kit
Complete kit for starting your own worm composting system.
Latest MN growing zone mapThe 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 Knife River is in growing zone 4b this means that plants there can survive temperatures as low as -25 to -20 degrees Fahrenheit. Plants for Knife River'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.
Some zones may have been changed by the USDA as of 2023. To see if the Knife River area has been affected, refer to this map of half zone changes from the 2012 version of the USDA zones to the 2023 version.
Half zone changes from 2012 to 2023The 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!
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 Knife River, MN.
The USDA hardiness zone is 4b for Knife River. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.
Knife River's Growing Zone Details
USDA Growing Zone: 4b
Zip Codes: 55609
Longitude: -91.7837
Latitude: 46.9495
Lowest Avg Temperatures (F): -25 to -20
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Deluxe Plastic Watering Can
High-capacity watering can with comfortable grip and precise spout.
Fiskars Garden Harvest Basket
Sturdy basket for collecting and carrying your garden harvest.
Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
Map of the Knife River Area
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Easy-to-assemble raised garden bed for better soil control and drainage.
Seed Starting Trays
Perfect for starting seeds indoors before transplanting to your garden.
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Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.
Hydroponic Garden Grow Kit
Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
Rustic Iron Garden Trellis
Sturdy trellis for supporting climbing plants and vines.
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Small Greenhouse Kit
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High-capacity watering can with comfortable grip and precise spout.
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Innovative pots that maintain optimal moisture levels.
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