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[IBC] Climate zones in general (was: New USDA map)
I'm afraid you have misunderstood the USDA standards for the
climate zones. The climate zone records the AVERAGE winter low temperature. If the lowest temperature one year is -20 and the lowest temperature the next year is zero, you have an average minimum temperature of -10. And, of course, there are quite a few more than 2 years from which to work out the average, so it is fairly accurate. We who live south of the Mason-Dixon line (USA), of course, wish plant people would adopt the American Horticultural Society's Heat Zone index. It is MUCH more important to us. I've seen it used in a couple of (non-bonsai) books, but the nurseries have yet to adopt it. A good alternative would be the Sunset zones, which are based on a number of factors. I do question, however, how valid those zones are outside of the 10 western states that are Sunset's home turf. I was doing a Google for climate zones the other day and found references to climate zone schemes in North America, Canada, Europe, Great Britain, and Australia before I found what I was looking for and quit the search. There MAY have been one for Africa, too????? Jim Lewis - - Tallahassee, FL - Nature encourages no looseness, pardons no errors. Ralph Waldo Emerson ************************************************** ****************************** ++++Sponsored, in part, by Mark Zimmerman++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
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