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Editor's Picks

Michael Eason hiking in Anza-Borrego Desert State Park to observe Washingtonia filifera in situ
Finding His Roots: Michael Eason's Journey in Conservation
Currently at San Antonio Botanic Garden, Michael's work has...
Amy Byrne | Feb 15, 2023
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Richard Geraint Evans: GPS Trees
An exhibition that beautifully depicts and locates oaks
Roderick Cameron | Feb 09, 2023
Burke Oak Collection at New York Botanical Garden
The Burke Oak Collection at The New York Botanical Garden
The Coleman and Susan Burke Oak Collection at The New York...
Todd Forrest | Feb 08, 2023

Plant Focus

Quercus xjackiana acorns
Hybrid Highlight: Quercus ×jackiana C.K. Schneid.
The hybrid of Q. alba and Q. bicolor
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American Plant Hardiness Map 2012

By Charles Snyers | September 16, 2012

In January 2012, the USDA Agricultural Research Service released a new edition of the American Plant Hardiness Map.  The previous edition was released in 1990.  Two new zones 12 and 13 have been added to this 2012 edition.  The zones are based on 1976-2055 weather data, that is 30 years of data.  The 1990 edition was based on 13 years of data.  See the What's new section of the USDA ARS Web site for details here. 

For the first time, the map is available as an interactive GIS-based map.