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Re: USDA zones?


> Ive noticed something about the USDA zones. Those zones are very general and
> vague. 
>. Anyhow point is Sunset zones are more specific. Like my zone, 17,
> Major marine influece and winter temps get barely past freezing.)

We all sure wish there was something as specific as the Sunset zone system for 
the rest of the country, but alas, there isn't. The USDA zone map is based on 
average minimum temperature, period. There have been some attempts at other 
sustems, but none have caught on because of some flaw or other. The soils, 
precipitation patterns, humidity and local topography mean so much in using 
those zone numbers (the factors considered in the Sunset system), but at least 
it gives us a start. I can relate to a question or comment if I can at least 
associate it with a zone number.

Mary R. Henry
Dept. of Horticulture
U. of MN
phone: 612-729-9524
FAX: 729-1573
"We're all in this together."  USDA Zone 4a


Dear Mary,

If its not to much trouble and for the benefit of all other list 
members outside the USA,could you perhaps give us a detailed list and 
simple explanation how the USDA zones system works of all USA states? 
(including Alaska and Hawaii for comparison)
I am sure with your knowledge on the subject, we will all be the 
wiser and more informed
Could you also explain how the Sunset zone system works please?
I live in New Zealand (North Island) latitude 37.5 (almost frost 
free) Average Winter temp.10 C.    AverageSummer temp.24 C.
Would that be zone 8,  9  or 10 ?
We could then store or print the info list for easy reference,when we 
correspond on the Internet with our friends in the USA.
Your efforts would be much appreciated Mary.
Thanking you in advance.

Kind regards, Bill  Dijk.    zone.........?

Ps: Any additional relevant information from other list members would 
be welcome. Thank you.
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