One of the most important steps in choosing plants is making sure it is suited to your climate. Find your USDA zone using these state maps. You can then choose plants that are suggested for that USDA zone. Just click on the picture to see the full size map.
11. Hawaii USDA Zone Map

Photo © USDAUSDA Zones 10a through 11 represented in Hawaii.
12. Idaho USDA Zone Map

Photo © USDAUSDA Zones 2b through 6b represented in Idaho.
13. Illinois USDA Zone Map

Photo © USDAUSDA Zones 4b through 6b represented in Illinois.
14. Indiana USDA Zone Map

Photo © USDAUSDA Zones 5a through 6b represented in Indiana.
15. Iowa USDA Zone Map

Photo © USDAUSDA Zones 4a through 5a represented in Iowa.
16. Kansas USDA Zone Map

Photo © USDAUSDA Zones 5a through 6b represented in Kansas.
17. Kentucky USDA Zone Map

Photo © USDAUSDA Zones 5b through 6b represented in Kentucky.
18. Louisiana USDA Zone Map

Photo © USDAUSDA Zones 8a through 9a represented in Louisiana.
19. Maine USDA Zone Map

Photo © USDAUSDA Zones 3b through 5b represented in Maine.
20. Maryland USDA Zone Map

Photo © USDAUSDA Zones 5a through 7b represented in Maryland.