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Arkansas Planting Zones
Arkansas Planting Zones. The U.S. Department of Agriculture's plant hardiness zone map divides the United States into planting zones defined by the average annual low temperature. Arkansas crosses three zones. Compare the hardiness of plants to the map to determine if they will grow well in your region.
The U.S. Department of Agriculture's plant hardiness zone map divides the United States into planting zones defined by the average annual low temperature. Arkansas crosses three zones. Compare the hardiness of plants to the map to determine if they will grow well in your region.
Identification
Average annual low temperatures may vary widely across a state. For example, the average annual low in the northwestern tip of Arkansas, in subzone 6a, ranges from -5 degrees to -10 degrees Fahrenheit. By contrast, the average annual low in southern Arkansas, which lies in subzone 8a, ranges from 10 to 15 degrees.
Geography
Arkansas's three plant hardiness zones---6, 7 and 8---represent five subzones: 6a, 6b, 7a, 7b and 8a. No part of Arkansas is in subzone 8b.
The northern region of the state, which includes cities such as Hope Springs and Fayetteville, lies in subzones 6a and 6b. The middle portion, including Little Rock, Jonesboro and West Memphis, straddles zone 7a and zone 7b. The southern region, which includes Hope and Texarkana, is in zone 8a.
Considerations
As noted by the University of Arkansas Cooperative Extension Service, the average high temperature, the soil type, and many other environmental conditions must be taken into consideration---along with the average annual low temperature---when attempting to determine what to plant.
