What Growing Zone Is Potomac?
Our records indicate the United States Department of Agriculture has given Potomac 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 Potomac's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Potomac's weather data from 1991 - 2020 in their analysis.
Latest IL growing zone mapIf you are looking for plants suitable for growing in the Potomac area, head on over to our page on plants that grow well in Potomac, IL.
Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
Small Greenhouse Kit
Compact greenhouse perfect for small spaces.
Hydroponic Garden Grow Kit
Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
Raised Garden Bed Kit
Easy-to-assemble raised garden bed for better soil control and drainage.
Cluck Around Sign
Whimsical sign for your chicken coop area.
Latest IL 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 Potomac is in growing zone 6a this means that plants there can survive temperatures as low as -10 to -5 degrees Fahrenheit. Plants for Potomac'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 Potomac area has been affected, refer to this map of half zone changes from the 2012 version of the USDA zones to the 2023 version.
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!
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 Potomac, IL.
The USDA hardiness zone is 6a for Potomac. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.
Potomac's Growing Zone Details
USDA Growing Zone: 6a
Zip Codes:
Longitude: -87.7977
Latitude: 40.3067
Lowest Avg Temperatures (F): -10 to -5
Fiskars Garden Harvest Basket
Sturdy basket for collecting and carrying your garden harvest.
Cluck Around Sign
Whimsical sign for your chicken coop area.
Wooden Chicken Coop
Spacious and secure home for your backyard chickens.
Large Greenhouse Kit
Spacious greenhouse for extending your growing season.
Hydroponic Garden Grow Kit
Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
Map of the Potomac Area
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Hoeing Ain't Easy Garden Sign
Fun and decorative garden sign to add personality to your space.
Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
Raised Garden Planter
Elevated planter for easy access and better drainage.
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.
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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Fiskars Garden Harvest Basket
Sturdy basket for collecting and carrying your garden harvest.
Deluxe Plastic Watering Can
High-capacity watering can with comfortable grip and precise spout.
Cluck Around Sign
Whimsical sign for your chicken coop area.
Brass Decorative Faucet Handle
Elegant brass handle to enhance your garden faucet.
Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
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