If you are looking to find out what your growing zones in Idaho are, you will need to look at a USDA map of the plant hardiness zones. The above map is for Idaho plant zones and can help you find what planting zone you live in. The zones in Idaho range from 4, 5, 6 or 7.
You can find your Idaho hardiness planting zone by looking at the map above and locating approximately where you live on that map. Note the color of the growing zone in Idaho where your town is located and then compare that color to the legend.