Find your zone

Use the map below to locate your hardiness zone.

Average annual minimum temperature

Zone		Avg. Low (°F)
1		Below -50
2a		-50 to -45
2b		-45 to -40
3a		-40 to -35
3b		-35 to -30
4a		-30 to -25
4b		-25 to -20
5a		-20 to -15
5b		-15 to -10
6a		-10 to -5
6b		-5 to 0
7a		0 to 5
7b		5 to 10
8a		10 to 15
8b		15 to 20
9a		20 to 25
9b		25 to 30
10a		30 to 35
10b		35 to 40
11		Above 40

What are hardiness zones

Plant hardiness zones are based on the average minimum winter temperature in a region. Trees, shrubs and other perennial plants are rated on their ability to survive in each zone. A plant can tolerate zones with higher zone ratings as well — for example, a plant rated for zone 6 tolerates the minimum temperatures in zones 7-10.

Why does it help to know my zone

Use the hardiness zone rating when selecting perennial plants for your garden. Remember that the zone rating is just a guide — many factors determine whether an individual plant survives a winter.