What plant hardiness zone is Dauphin Island

Dauphin Island is located at Mobile County, Alabama (AL), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Dauphin Island is 9a by the USDA scale.

Coldest zone's winter temperature is +20 … +25 °F.

Plants of 9a USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 9a USDA.

Dauphin Island, Alabama @ wikipedia.