What Growing Zone Is DeWitt?
Our records indicate the United States Department of Agriculture has given DeWitt 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 DeWitt's climate based on the average extreme annual temperature. .Our data is based on the latest 2023 USDA maps, which used DeWitt's weather data from 1991 - 2020 in their analysis.
Latest IA growing zone mapIf you are looking for plants suitable for growing in the DeWitt area, head on over to our page on plants that grow well in DeWitt, IA.
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Organized storage solution for your seed collection.
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Innovative pots that maintain optimal moisture levels.
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Sturdy basket for collecting and carrying your garden harvest.
Stainless Steel Garden Tool Set
Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.
Deluxe Plastic Watering Can
High-capacity watering can with comfortable grip and precise spout.
Latest IA 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 DeWitt is in growing zone 5b this means that plants there can survive temperatures as low as -15 to -10 degrees Fahrenheit. Plants for DeWitt'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 DeWitt 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!
DeWitt's Growing Zone Details
USDA Growing Zone: 5b
Zip Codes: 52742
Longitude: -90.5448
Latitude: 41.8227
Lowest Avg Temperatures (F): -15 to -10
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Whimsical sign for your chicken coop area.
Wooden Chicken Coop
Spacious and secure home for your backyard chickens.
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.
Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
Map of the DeWitt Area
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Deluxe Plastic Watering Can
High-capacity watering can with comfortable grip and precise spout.
Worm Composting Kit
Complete kit for starting your own worm composting system.
Fiskars Garden Harvest Basket
Sturdy basket for collecting and carrying your garden harvest.
Hoeing Ain't Easy Garden Sign
Fun and decorative garden sign to add personality to your space.
Plants For Other States
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Small Greenhouse Kit
Compact greenhouse perfect for small spaces.
Raised Garden Bed Kit
Easy-to-assemble raised garden bed for better soil control and drainage.
Reusable Grow Bags
Breathable fabric grow bags that promote healthy root growth for your vegetables and fruits.
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.
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