What Growing Zone Is Cromwell?
Our records indicate the United States Department of Agriculture has given Cromwell 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 Cromwell's climate based on the average extreme annual temperature. .Our data is based on the latest 2023 USDA maps, which used Cromwell's weather data from 1991 - 2020 in their analysis.
If you are looking for plants suitable for growing in the Cromwell area, head on over to our page on plants that grow well in Cromwell, IA.
Worm Composting Kit
Complete kit for starting your own worm composting system.
Cluck Around Sign
Whimsical sign for your chicken coop area.
Wooden Chicken Coop
Spacious and secure home for your backyard chickens.
Brass Decorative Faucet Handle
Elegant brass handle to enhance your garden faucet.
Raised Garden Bed Kit
Easy-to-assemble raised garden bed for better soil control and drainage.
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 Cromwell is in growing zone 5b this means that plants there can survive temperatures as low as -15 to -10 degrees Fahrenheit. Plants for Cromwell'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 Cromwell 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!
Cromwell's Growing Zone Details
USDA Growing Zone: 5b
Longitude: -94.4618
Latitude: 41.0405
Lowest Avg Temperatures (F): -15 to -10
Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
Fiskars Garden Harvest Basket
Sturdy basket for collecting and carrying your garden harvest.
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.
Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
Map of the Cromwell Area
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Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
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.
Rustic Iron Garden Trellis
Sturdy trellis for supporting climbing plants and vines.
Plants For Other States:
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Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
Large Greenhouse Kit
Spacious greenhouse for extending your growing season.
Brass Watering Can
Elegant brass watering can with classic design and durability.
Deluxe Plastic Watering Can
High-capacity watering can with comfortable grip and precise spout.
Small Greenhouse Kit
Compact greenhouse perfect for small spaces.
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