"Sed5555" wrote in message
...
When
folks discuss zones in this newsgroup, are they referring to the
Sunset Western Garden book's definition of zones? Or are there other
zone definitions to take into consideration?

USDA Plant Hardiness zones (new for 2003):
http://www.colostate.edu/Depts/CoopE...den/zones2.htm
sed5555

Official Site for all of the US:
http://www.usna.usda.gov/Hardzone/ushzmap.html