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Planting Zones by County
Find your USDA plant hardiness zone (2023 map) by county, with the average coldest winter night and your frost dates. Covers every county in Tennessee, Georgia, North Carolina, Texas, Pennsylvania and Ohio.
Photo: Rows of apple trees in white blossom along a grassy orchard alley. Philip Halling, CC BY-SA 2.0, via Wikimedia Commons
What planting zone am I in?
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Zones from the USDA ARS 2023 Plant Hardiness Zone Map. Your location stays in your browser.
Planting zones by state
- Tennessee planting zone map
- Georgia planting zone map
- North Carolina planting zone map
- Texas planting zone map
- Pennsylvania planting zone map
- Ohio planting zone map
| Zone | Average coldest winter night |
|---|---|
| 5a | -20 to -15°F |
| 5b | -15 to -10°F |
| 6a | -10 to -5°F |
| 6b | -5 to 0°F |
| 7a | 0 to 5°F |
| 7b | 5 to 10°F |
| 8a | 10 to 15°F |
| 8b | 15 to 20°F |
| 9a | 20 to 25°F |
| 9b | 25 to 30°F |
| 10a | 30 to 35°F |
| 10b | 35 to 40°F |
How planting zones work
USDA plant hardiness zones group places by the average coldest winter night. The 2023 map uses NOAA and PRISM temperature data from 1991 to 2020. Each zone covers 10°F and is split into an a half (colder) and a b half (warmer) of 5°F. Plant labels and nursery catalogs give a zone range for perennials, shrubs and trees; a plant rated to your zone or colder should survive a normal winter.
Zones do not set planting dates. Vegetables are planted by frost dates, which can differ by weeks between two places in the same zone, so each county page here shows both. The state zone pages show the official USDA map for each state, reduced in size, with a link to the full file.
Choose your state
Planting zone questions
What is a planting zone?
A USDA plant hardiness zone groups places by the average coldest winter night from 1991 to 2020, in 10°F zones split into 5°F halves.
Is my zone the same as my frost date?
No. Zones are for judging which perennials survive winter. Frost dates decide when to plant vegetables.
Photos: Rows of apple trees in white blossom along a grassy orchard alley: Philip Halling, CC BY-SA 2.0, via Wikimedia Commons; Community garden plots of beans, onions and greens beside flower borders and paths: Mack Male from Edmonton, AB, Canada, CC BY-SA 2.0, via Wikimedia Commons; Tall corn and other vegetables growing in a fenced backyard garden: Tomwsulcer, CC0, via Wikimedia Commons; Community vegetable area with brick paths, timber beds and flowering plants: David Hawgood, CC BY-SA 2.0, via Wikimedia Commons; Round hay bales in a frosty hayfield at dawn in Athens, Tennessee: Nheyob, CC BY-SA 4.0, via Wikimedia Commons; Green pasture and old barn below wooded hills in rural Polk County: .:[ Melissa ]:., CC BY 2.0, via Flickr; Fallow field and red tobacco barns, Lee County: Donald Lee Pardue, CC BY 2.0, via Flickr; Grassland hills and sotol in Davis Mountains State Park: aafromaa, CC BY 2.0, via Flickr; Autumn mountainside and green valley floor seen from the dam at Sinnemahoning State Park: Nicholas A. Tonelli, CC BY 2.0, via Flickr; Wide flat green fields southwest of Kalida, Putnam County: Nyttend, Public domain, via Wikimedia Commons.