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  Cold hardiness of Typhonium horsfieldii
From: Victor Soukup <soukupvg at email.uc.edu> on 2007.06.14 at 06:55:44(15784)
Hi,
Every once in a while the subject of cold hardiness comes up in
discussions of particular aroids. I want to add one example based on my
own experiences.
I received several years ago from Chen Yi some tubers of Typhonium
horsfieldii, which were potted. Three years ago I placed several outside
on a northwest-facing mesic, calcareous, hillside under mixed deciduous and
hemlock trees. These plants continue to grow (no blooms this year yet)
even though this was a very cold winter with one stretch of 10 degrees
below freezing F of three weeks. Cincinnati is considered as Zone 5/6,
maybe in protected sites, 7.
Typhonium venosum (Sauromatum venosum) regularly goes through our winters,
but showed some die back this year.
Has anyone else tried other Typhoniums (other than giganteum or
diversifolium) outside, and if so, with what results?

Vic

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