What Growing Zone Is Winthrop?
Our records indicate the United States Department of Agriculture has given Winthrop a growing zone designation of 5a. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Winthrop's climate based on the average extreme annual temperature. .Our data is based on the latest 2023 USDA maps, which used Winthrop's weather data from 1991 - 2020 in their analysis.
If you are looking for plants suitable for growing in the Winthrop area, head on over to our page on plants that grow well in Winthrop, IA.
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Raised Garden Planter
Elevated planter for easy access and better drainage.
Fiskars Garden Harvest Basket
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.
Hoeing Ain't Easy Garden Sign
Fun and decorative garden sign to add personality to your space.
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 Winthrop is in growing zone 5a this means that plants there can survive temperatures as low as -20 to -15 degrees Fahrenheit. Plants for Winthrop'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 Winthrop 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!
Winthrop's Growing Zone Details
USDA Growing Zone: 5a
Zip Codes: 50682
Longitude: -91.7375
Latitude: 42.4708
Lowest Avg Temperatures (F): -20 to -15
Hoeing Ain't Easy Garden Sign
Fun and decorative garden sign to add personality to your space.
Raised Garden Bed Kit
Easy-to-assemble raised garden bed for better soil control and drainage.
Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
Steel Hori Hori Weeding Knife
Versatile Japanese-style gardening knife for weeding and planting.
Rustic Iron Garden Trellis
Sturdy trellis for supporting climbing plants and vines.
Map of the Winthrop Area
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Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
Raised Garden Planter
Elevated planter for easy access and better drainage.
Small Greenhouse Kit
Compact greenhouse perfect for small spaces.
Cluck Around Sign
Whimsical sign for your chicken coop area.
Stainless Steel Garden Tool Set
Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.
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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Seed Starting Trays
Perfect for starting seeds indoors before transplanting to your garden.
Shiitake Mushroom Kit
Grow your own delicious shiitake mushrooms at home.
Rustic Iron Garden Trellis
Sturdy trellis for supporting climbing plants and vines.
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.
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