USA is divided into 13 grow zones grouped together by weather. See zone map to locate your hardiness zone or search online using your zip code. Plant is best suited but not limited to the recommended zones.
The map shows the average minimum winter temperatures across the country. The USDA map covers 13 zones with temperatures ranging from -60 degrees Fahrenheit (zone 1) to 70 degrees Fahrenheit (zone 13).
Your last frost date is determined by the location of your zone. Below is a chart of average times when first and last frost dates occur in each hardiness zone.
Last frost date is in spring and first frost date occurs in fall.
For a more accurate date, enter your zip code online and search for your zone and the last frost date.