Mapping plant hardiness as climate warms
03-27-2009
New gardening zone map expected from USDA this year; new map likely will extend plants' northern ranges, show continent's warming. It draws on 30 years of data, including local temperatures, altitude and presence of water bodies. USDA commissioned map after American Horticultural Society released draft update that showed significant warming over 1990 version, with many parts of nation shifted to warmer climate zones.
Read the story at The Daily Climate/Environmental Health Sciences
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