Image: USDA Hardiness zone map

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Description: USDA Hardiness Zones in North America. Albers equal area projection, standard parallels of 29.5°N and 45.5°N, scale 1 : 6,000,000 (approx.)
Title: USDA Hardiness zone map
Credit: USDA plant hardiness zone map 1990 (USDA Miscellaneous Publication No. 1475) ISBN: 0160187478, USDA website
Author: Henry M. Cathey while Director, U.S. National Arboretum, Agricultural Research Service, U.S. Department of Agriculture, Washington, DC 20002 Edited, formatted and prepared for the US National Arboretum web site by Ramon Jordan, March 1998 & Revised March 2001 Special thanks to Jody Shuart and Scott Bauer, ARS Information Staff
Permission: Public Domain
Usage Terms: Public domain
License: Public domain
Attribution Required?: No

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