What Growing Zone Is Marengo?
Our records indicate the United States Department of Agriculture has given Marengo 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 Marengo's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Marengo's weather data from 1991 - 2020 in their analysis.
Latest IL growing zone mapIf you are looking for plants suitable for growing in the Marengo area, head on over to our page on plants that grow well in Marengo, IL.
Raised Garden Bed Kit
Easy-to-assemble raised garden bed for better soil control and drainage.
Large Greenhouse Kit
Spacious greenhouse for extending your growing season.
Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
Small Greenhouse Kit
Compact greenhouse perfect for small spaces.
Steel Hori Hori Weeding Knife
Versatile Japanese-style gardening knife for weeding and planting.
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 Marengo is in growing zone 5b this means that plants there can survive temperatures as low as -15 to -10 degrees Fahrenheit. Plants for Marengo'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 Marengo 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 Marengo, IL.
The USDA hardiness zone is 5b for Marengo. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.
Marengo's Growing Zone Details
USDA Growing Zone: 5b
Zip Codes: 60152
Longitude: -88.6163
Latitude: 42.2299
Lowest Avg Temperatures (F): -15 to -10
Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
Large Greenhouse Kit
Spacious greenhouse for extending your growing season.
Brass Decorative Faucet Handle
Elegant brass handle to enhance your garden faucet.
Wooden Chicken Coop
Spacious and secure home for your backyard chickens.
Shiitake Mushroom Kit
Grow your own delicious shiitake mushrooms at home.
Map of the Marengo Area
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Rustic Iron Garden Trellis
Sturdy trellis for supporting climbing plants and vines.
Raised Garden Planter
Elevated planter for easy access and better drainage.
Large Greenhouse Kit
Spacious greenhouse for extending your growing season.
Cluck Around Sign
Whimsical sign for your chicken coop area.
Deluxe Plastic Watering Can
High-capacity watering can with comfortable grip and precise spout.
Plants For Other States
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Steel Hori Hori Weeding Knife
Versatile Japanese-style gardening knife for weeding and planting.
Stainless Steel Garden Tool Set
Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.
Brass Watering Can
Elegant brass watering can with classic design and durability.
Rustic Iron Garden Trellis
Sturdy trellis for supporting climbing plants and vines.
Large Greenhouse Kit
Spacious greenhouse for extending your growing season.
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