Sullivan County, Indiana Hardiness Zones

According to the 2023 USDA Hardiness Zone Map Sullivan County, Indiana is in Zones 6a (-10°F to -5°F) and 6b (-5°F to 0°F). This is a change from the 2012 USDA Hardiness Zone Map which has Sullivan County in Zones 6a (-10°F to -5°F).

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