A hardiness zone is a geographic area with a similar average minimum temperature. The map is based on the average annual ...
Spring has begun in Louisiana and flowers are blooming, but some garden plants may not grow due hardiness zones. So, here's Louisiana's growing zones.
The USDA bases its plant zone maps on average minimum temperature so people in each zone know which plants can best withstand their local weather. For example, a tropical plant that needs 40 ...