Hardiness Plant Zone Map

Just a little information to help you determine your outdoor plant needs. The USDA provided Americans with a hardiness plant zone map that determines plant zones by the median low temperature obtained in each zone. This map is quite helpful to determine what plants you have under your grow lights can be placed outside as well. Later on, Sunset Magazine expanded on this map to include other facets such as precipitation and humidity. Their Sunset Climate Map is extremely helpful and can be enlarged to smaller zones, enjoy!