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USDA Plant Hardiness Zone Map

I thought I was in zone 8B. New map puts me in 9A. Global warming?

http://planthardiness.ars.usda.gov/PHZMWeb/

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  • BLB

Has me at 7b in Philly. It used to be 6, must be global warming. 

I think things change.  I go by Sunset Western Garden's climate map because it specifies microclimates.

Suzi

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