USDA Plant Hardiness Zone Maps

By Marie Iannotti, About.com Guide

Alaska and Hawaii are not included on the same map with the lower 48 states. They have their own separate map, shown here.

Two new zones were added to the warm end of the scale. They apply only to the climates of Hawaii and Puerto Rico, but they will also be useful to anyone who grows tropical and semitropical plants indoors, by better defining the growing conditions these plants favor and in particular, their sensitivity to cold.

• Zone 12 - average annual extreme minimum temperatures above 50 F.
• Zone 13 - average annual extreme minimum temperatures above 60 F.

You can download the map at the USDA Plant Hardiness Map Site

• USDA Plant Hardiness Map and What Changes Were made
• Regional Plant Hardiness Maps
• Plant Hardiness Maps by State
• More Info on how hardiness zones are determined

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• The Newest USDA Plant Hardiness Zone Map for the United States
• USDA Plant Hardiness Zone Maps for Alaska and Hawaii
• USDA Regional Plant Hardiness Zone Maps
• New USDA Plant Hardiness Zone Maps by State

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