USDA Plant Zones
The USDA released a new Plant Hardiness Zone Map today. For Hays County you can see we have moved from 8a/8b, in 1990, to a solid 8b, in 2012, and now 8b/9a, in 2023. The USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which perennial plants are most likely to thrive at a location.
All Plant Hardiness Zone Maps (PHZM) should serve as general guides for growing perennial plants. They are based on the average lowest temperatures, not the lowest ever. Take a look at the USDA website and find your county or street in the county.
See below for the progression of Hays County to warmer average lows from 1990 to
U.S. view as of 2023
Hays County is in the 8b to 9a zones
U.S. view as of 2012
Hays County is in the 8b zone