What Growing Zone Is Ironton?
Our records indicate the United States Department of Agriculture has given Ironton a growing zone designation of 6b. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Ironton's climate based on the average extreme annual temperature.Our data is based on the latest 2023 USDA maps, which used Ironton's weather data from 1991 - 2020 in their analysis.
Latest MO growing zone mapIf you are looking for plants suitable for growing in the Ironton area, head on over to our page on plants that grow well in Ironton, MO.
Hoeing Ain't Easy Garden Sign
Fun and decorative garden sign to add personality to your space.
Deluxe Plastic Watering Can
High-capacity watering can with comfortable grip and precise spout.
Raised Garden Planter
Elevated planter for easy access and better drainage.
Wooden Chicken Coop
Spacious and secure home for your backyard chickens.
Self Watering Plant Pots
Innovative pots that maintain optimal moisture levels.
Latest MO 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 Ironton is in growing zone 6b this means that plants there can survive temperatures as low as -5 to 0 degrees Fahrenheit. Plants for Ironton'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 Ironton 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 Ironton, MO.
The USDA hardiness zone is 6b for Ironton. This is sometimes also referred to as the growing or planting zone. These terms are used interchangeably.
Ironton's Growing Zone Details
USDA Growing Zone: 6b
Zip Codes: 63650
Longitude: -90.6379
Latitude: 37.5984
Lowest Avg Temperatures (F): -5 to 0
Rustic Iron Garden Trellis
Sturdy trellis for supporting climbing plants and vines.
Deluxe Plastic Watering Can
High-capacity watering can with comfortable grip and precise spout.
Stainless Steel Garden Tool Set
Complete garden tool set with heavy-duty stainless steel tools for all your gardening needs.
Fiskars Garden Harvest Basket
Sturdy basket for collecting and carrying your garden harvest.
Brass Watering Can
Elegant brass watering can with classic design and durability.
Map of the Ironton Area
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Hydroponic Garden Grow Kit
Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.
Steel Hori Hori Weeding Knife
Versatile Japanese-style gardening knife for weeding and planting.
Reusable Grow Bags
Breathable fabric grow bags that promote healthy root growth for your vegetables and fruits.
Wooden Chicken Coop
Spacious and secure home for your backyard chickens.
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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Steel Hori Hori Weeding Knife
Versatile Japanese-style gardening knife for weeding and planting.
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.
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.
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