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Re: [GWL]: Cotswolds Zone



Tom Ogren wrote:
> 
> Larry,
> 
>   In defense of the USDA zones, there is considerable merit in knowing the
> historical low temperatures. Many kinds of fruit trees are hard to a certain
> degree and not a degree lower. When I lived in northern Minnesota, zone 3, I
> found that out many times with different cultivars of apples, cherries and
> plums.
> 
> Tom

Tom,
My objection is how the USDA zone information is used, almost universally,
by nurseries and plant suppliers as a planting guide.

As you say, and as I said, it gives the low temperature a plant is known
to tolerate. But a plant that will survive Duluth winters is almost
sure not to do well in Key West--yet the catalogs imply that if 
the plant is "hardy" in your zone, it will do well there.

As garden writers we should try to educate people that the USDA
zone information is useful for winter hardiness, but it doesn't
tell you if a plant will do well in your garden.

Larry

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