The Arbor day foundation has redone it's plant zone maps for anyone who does work on their gardens or landscaping.It shows warming since 1990.
Crummy legacy we are leaving our kids
http://www.arborday.org/media/zonechanges2006.cfm
Marty
Crummy legacy we are leaving our kids
http://www.arborday.org/media/zonechanges2006.cfm
Marty