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.
USU Extension - Tree Browser
USU’s Tree Browser is a database with photos and text descriptions of over 200 tree species found in Utah and the Intermountain West. Provides excellent information on care, disease, and spreading habits.