Quote:
Originally Posted by Patty in Wisc
I had this in my bookmarks. I do remember a new map showed all zones with A or B - maybe '02?. I'm zone 5 but it changed to zone 5B (b being warmer than a). Then they changed it back to just using the zone #. In this link it shows newest zone map from '06. Read up
SPS Climate
here's a good one:
The Arbor Day Foundation |
It is interesting to look at the map of zone changes--it looks like ripples in the sand, but I guess that is understandable that the warmer half of each zone would see the change first. It is also surprising that parts of the mountain west got colder.