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  hardiness
From: Lester Kallus <lkallus at earthlink.net> on 1997.02.19 at 08:58:37(391)
I'm curious if my plants will have survived the winter. Yesterday, while
searching through another catalog, I found Colocasia esculenta listed as a
zone 9 plant. Having thought it was a zone 7 plant, I left mine out this
winter.

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From: Al Wootten <awootten at NRAO.EDU> on 1997.02.19 at 11:12:43(392)
Lester Kallus writes:
> I'm curious if my plants will have survived the winter. Yesterday, while
> searching through another catalog, I found Colocasia esculenta listed as a
> zone 9 plant. Having thought it was a zone 7 plant, I left mine out this
> winter.
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From: Tony Avent <tony at plantdel.com> on 1997.02.19 at 17:05:05(394)
Les:

Both Colocasia esculenta and Amorph. bulbifer haved survived 0
degrees F in our garden for relatively short periods of time. Realize that
most of the writing about aroids was not done by gardeners in zone 7.

Tony Avent

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From: BIHOREL at cris.com (Christian Feuillet) on 1997.02.20 at 11:57:46(403)
>Les:
>
> Both Colocasia esculenta and Amorph. bulbifer haved survived 0
>degrees F in our garden for relatively short periods of time. Realize that
>most of the writing about aroids was not done by gardeners in zone 7.
>
>Tony Avent
>Plant Delights Nursery
>9241 Sauls Road
>Raleigh, NC 27603
>USA
>USDA zone 7, 0F-100F
>"I Consider Every Plant Hardy Until I Have Killed It Myself...Three Times" -
>Avent

I could not agree more.
True for hardiness, but also other growing conditions. I am in zone 6b (less
than 2 miles N of USDA research station in Beltsville) --> no error in the
zoning.
Among those that are not supposed to live here:
I cover laurel with dead stems of Aster and the laurel survives very short.
I do nothing special to Dahlia and Zantedeschia. After 8 years the dahlia
crowd is down to 5, but the Zantedeschia cultivars are slowly multiplying in
all-morning sun.
Clematis armandii is reduced to a non-blooming erect herb (winter) vining a
bit in summer. Passiflora caerulea has vigorous non-blooming climbing stems.
But on the other hand, I can't keep Pinus bungeana, Corydalis flexuosa ...
through winter. And it should not be the cold.

Christian

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