print email comment close USDA Plant Hardiness Zone Map URL: http://www.usna.usda.gov/Hardzone/ Description: This interactive document from the U.S. Department of Agriculture shows 10 different minimum temperature zones in the United States, Canada, and Mexico, "each of which represents an area of winter hardiness for the plants of agriculture and our natural landscape. It also introduces zone 11 to represent areas ... that are ... essentially frost free." Also includes information about the creation of the map, and indicator plant examples for selected woody plants. Publisher: United States National Arboretum; United States Department of Agriculture Extra Keywords USDA Miscellaneous Publication No. 1475 Library of Congress Subject Headings: Atmospheric temperature -- United States -- Maps Gardening Plants -- Hardiness LII Database Information: Record 12569 created by Ruth Seid on 08/23/2004 Last modification on 10/14/2004 Published: 08/23/2004   Funding agency: California State Library LII Item ID: http://lii.org/cs/lii/view/item/12569