What Growing Zone Is Rockwell City?
Our records indicate the United States Department of Agriculture has given Rockwell City 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 Rockwell City's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Rockwell City's weather data from 1991 - 2020 in their analysis.
Latest IA growing zone mapIf you are looking for plants suitable for growing in the Rockwell City area, head on over to our page on plants that grow well in Rockwell City, IA.
Rustic Iron Garden Trellis
Sturdy trellis for supporting climbing plants and vines.
Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
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.
Stainless Steel Garden Tool Set
Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.
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 Rockwell City is in growing zone 5a this means that plants there can survive temperatures as low as -20 to -15 degrees Fahrenheit. Plants for Rockwell City'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 Rockwell City 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 Rockwell City, IA.
The USDA hardiness zone is 5a for Rockwell City. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.
Rockwell City's Growing Zone Details
USDA Growing Zone: 5a
Zip Codes: 50579
Longitude: -94.6289
Latitude: 42.3981
Lowest Avg Temperatures (F): -20 to -15
Seed Starting Trays
Perfect for starting seeds indoors before transplanting to your garden.
Deluxe Plastic Watering Can
High-capacity watering can with comfortable grip and precise spout.
Raised Garden Bed Kit
Easy-to-assemble raised garden bed for better soil control and drainage.
Hoeing Ain't Easy Garden Sign
Fun and decorative garden sign to add personality to your space.
Stainless Steel Garden Tool Set
Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.
Map of the Rockwell City Area
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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.
Large Greenhouse Kit
Spacious greenhouse for extending your growing season.
Fiskars Garden Harvest Basket
Sturdy basket for collecting and carrying your garden harvest.
Worm Composting Kit
Complete kit for starting your own worm composting system.
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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Wooden Chicken Coop
Spacious and secure home for your backyard chickens.
Raised Garden Planter
Elevated planter for easy access and better drainage.
Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
Hoeing Ain't Easy Garden Sign
Fun and decorative garden sign to add personality to your space.
Metal Arbor Trellis
Decorative arbor trellis for climbing plants and garden entrance.
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