What Growing Zone Is Union Hill?
Our records indicate the United States Department of Agriculture has given Union Hill 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 Union Hill's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Union Hill's weather data from 1991 - 2020 in their analysis.
Latest IL growing zone mapIf you are looking for plants suitable for growing in the Union Hill area, head on over to our page on plants that grow well in Union Hill, IL.
Hydroponic Garden Grow Kit
Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
Brass Watering Can
Elegant brass watering can with classic design and durability.
Shiitake Mushroom Kit
Grow your own delicious shiitake mushrooms at home.
Steel Hori Hori Weeding Knife
Versatile Japanese-style gardening knife for weeding and planting.
Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
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 Union Hill is in growing zone 5b this means that plants there can survive temperatures as low as -15 to -10 degrees Fahrenheit. Plants for Union Hill'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 Union Hill 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 Union Hill, IL.
The USDA hardiness zone is 5b for Union Hill. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.
Union Hill's Growing Zone Details
USDA Growing Zone: 5b
Longitude: -88.1463
Latitude: 41.1086
Lowest Avg Temperatures (F): -15 to -10
Hydroponic Garden Grow Kit
Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
Large Greenhouse Kit
Spacious greenhouse for extending your growing season.
Brass Decorative Faucet Handle
Elegant brass handle to enhance your garden faucet.
Small Greenhouse Kit
Compact greenhouse perfect for small spaces.
Shiitake Mushroom Kit
Grow your own delicious shiitake mushrooms at home.
Map of the Union Hill Area
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Small Greenhouse Kit
Compact greenhouse perfect for small spaces.
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.
Hydroponic Garden Grow Kit
Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
Cluck Around Sign
Whimsical sign for your chicken coop area.
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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Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
Steel Hori Hori Weeding Knife
Versatile Japanese-style gardening knife for weeding and planting.
Deluxe Plastic Watering Can
High-capacity watering can with comfortable grip and precise spout.
Seed Starting Trays
Perfect for starting seeds indoors before transplanting to your garden.
Hydroponic Garden Grow Kit
Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
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