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Re: [GWL]: Cotswolds Zone

Larry,

   I would agree with everything you say here, 100%. Just because a plant is
winter hardy in an area hardly means it would thrive in that area. And yes,
many mail order nurseries have been guilty of this sort of thing, looking to
make the sale
    From my own point of view, which concerns allergies and plants, a tree
growing where it is hardy but where it will never thrive, for example a
Black Ash(native to a cold swamp in No. Minnesota), planted and growing in
the Los Angeles area, that tree will always eventually get buggy, and then
will be covered with mold growing on the honeydew from the insects. Then of
course the mold produces spores and that causes allergies. There a lot more
of this sort of thing than folks realize.
    By the way, on my last speaking trip down to Los Angeles, I noticed an
incredible problem with whitefly (along with remarkable amounts of soot and
mold) on a huge number of landscape shrubs. I wonder if other people are
seeing something like this in different areas?

Tom Ogren
tloallergyfree@earthlink.net

----- Original Message -----
From: "Larry Maxcy" <larrymax@cci-yuccavalley.com>
To: <Gardenwriters@topica.com>
Sent: Thursday, October 18, 2001 4:20 PM
Subject: 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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