What plant hardiness zone is Port Arthur

Port Arthur is located at Jefferson County, Texas (TX), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Port Arthur 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.

Port Arthur, Texas @ wikipedia.