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USDA Plant Hardiness Map
The USDA plant hardiness map was
developed by the United States Department of Agriculture - ARS
Division with the assistance of the Oregon State University Prism Climate Group in 2012. This is the first update done on the USDA map in many years.
Based on average annual extreme minimum
The USDA Hardiness map is simply a map that estimates the lowest temperatures possible in a given area. A lot
of factors including altitude, wind exposure, proximity to water,
snow cover, soil types and location in mountainous terrain
(valley, North, South locations) have effects on the annual
temperatures. These factors can change the hardiness zone as much as
2 zones difference. This applies both for plants that do
best in cool weather and in hot weather, with the growing zone
being extended based on all the factors.
It is for the above reasons that we recommend a grass climate map, as well as other maps, when deciding on the
type of grass you plan to plant.
Visit our state by state guide at
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