USDA Zone Debate (What Do You Think?)
According to Wikipedia (http://en.wikipedia.org/wiki/Usda_zone) the following cities as of the present have a USDA zone of 7-8:
1) Atlantic City, New Jersey
2) Baltimore, Maryland
3) Charlotte, North Carolina
4) New York City, New York
5) Raleigh, North Carolina
6) Seattle, Washington
7) Washington, D.C.
I've checked the site for almost a year to see if any changes occur for each cites' USDA zone and they have indeed. For starters New York City was at a 6, then a 6-7, and now they have it at 7-8. Same goes for Atlantic City, NJ.At one point this year though Baltimore, MD and Washington. DC had both read zone 8 and then now they are at 7-8. Why do you think there is a fluctuation in zone numbers? Personally I do like that New York City is being considered a zone 7-8, but why the fluctuation? I've done some research on Urban Heat Islands and some of the cities listed above have large urban heat islands that really do effect the climate in those cities. Urban Heat Island to me resemble "microclimates" on steroids.
What are your thought, comments, opinions etc?