Hardiness Zone Map

   The US Department of Agriculture publishes a map showing the average annual extreme minimum temperatures in a region. 

   In the Uinta Basin, we are shown as being in Zone 5, but to be on the safe side, we like to select plants that are hardy in Zone 4 (-30º). 

   Of course, there are many other variables that affect plant growth, including soils, moisture and the amount of sunlight we receive. This map indicates how winter hardy a plant should be to survive in our area.

   The link below leads to a zip code locator for the map. 

Utah State University Extension

   The USU Extension Service website provides a wealth of regional information about gardening and agriculture. Publications on a variety of topics can be read on-line or downloaded to your computer for future reference.