What plant hardiness zone is Rio Frio

Rio Frio is located at Real County, Texas (TX), USA.

Plant hardiness zone (winter frost zone or gardening zone) for Rio Frio is 8b by the USDA scale.

Coldest zone's winter temperature is +15 … +20 °F.

Plants of 8b USDA hardiness zone suitable for outdoor gardening and growing in this winter frost zone 8b USDA.

Rio Frio, Texas @ wikipedia.