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hardiness zone changes

I found this interesting:

http://www.washingtonpost.com/wp-srv/special/local/planthardinesszones/index.html


I opened one of my horticulture books that was written maybe 15 years ago and it had a US zone map, I saw that it was different than now so decided to look it up

Here is the article, about a year old, but interesting to see the changes.

Yes I changed from zone 6b to 7a.  Still not warm enought for my taste.

Unfortunately, zone 5 is not yet zone 9....sigh.....

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