What plant hardiness zone is Sour Lake

Sour Lake is located at Hardin County, Texas (TX), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Sour Lake 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.

Sour Lake, Texas @ wikipedia.