Knowing your hardiness zone is essential to picking the right plants for your area. Click on the map for a larger view.
average minimum temperature
Zone 2, -50 to -40F
Zone 3, -40 to -30F
Zone 4, -30 to -20F
Zone 5, -20 to -10F
Zone 6, -10 to 0F
Zone 7, 0 to 10F
Zone 8, 10 to 20F
Zone 9, 20 to 30F
Zone 10, 30 to 40F