What Growing Zone Is Hartly?

Our records indicate the United States Department of Agriculture has given Hartly a growing zone designation of 7b. Sometimes also called the planting or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Hartly's climate based on the average extreme annual temperature. .Our data is based on the latest 2023 USDA maps, which used Hartly's weather data from 1991 - 2020 in their analysis.

If you are looking for plants suitable for growing in the Hartly area, head on over to our page on plants that grow well in Hartly, DE.

Fiskars Garden Harvest Basket

Sturdy basket for collecting and carrying your garden harvest.

Raised Garden Bed Kit

Easy-to-assemble raised garden bed for better soil control and drainage.

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Hydroponic Garden Grow Kit

Grow fresh herbs and vegetables year-round with this indoor hydroponic garden system.

Brass Watering Can

Elegant brass watering can with classic design and durability.

Latest DE growing zone map

The 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 Hartly is in growing zone 7b this means that plants there can survive temperatures as low as 5 to 10 degrees Fahrenheit. Plants for Hartly'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 Hartly 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 2023

The 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!

Hartly's Growing Zone Details

Brass Watering Can

Elegant brass watering can with classic design and durability.

Hoeing Ain't Easy Garden Sign

Fun and decorative garden sign to add personality to your space.

Brass Decorative Faucet Handle

Elegant brass handle to enhance your garden faucet.

Large Greenhouse Kit

Spacious greenhouse for extending your growing season.

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.

Map of the Hartly Area

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Metal Arbor Trellis

Decorative arbor trellis for climbing plants and garden entrance.

Brass Watering Can

Elegant brass watering can with classic design and durability.

Worm Composting Kit

Complete kit for starting your own worm composting system.

Steel Hori Hori Weeding Knife

Versatile Japanese-style gardening knife for weeding and planting.

Wooden Chicken Coop

Spacious and secure home for your backyard chickens.

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.

Worm Composting Kit

Complete kit for starting your own worm composting 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.

Raised Garden Bed Kit

Easy-to-assemble raised garden bed for better soil control and drainage.

Metal Arbor Trellis

Decorative arbor trellis for climbing plants and garden entrance.