Re: Hardy Aroids

On Thu, 23 Oct 1997, James W. Waddick wrote:

> 	This string has turned from Dracunculus to Hardy aroids and I am
> surprised that no one has mentioned Calla palustris. This gets to
> considerable size, has impressive flowers and fruits and should be hardy
> fairly far north - Zone 4, 3?.

Jim, I've tried to get Calla palustris several times unsuccessfully -
seeds from an exchange never germinated for me, and plant sources haven't
worked out. Is anyone growing this?

> 	Then there's Orontium, Peltandra, and  Typhonium,
> Zantedeschia..although the latter two may only have 1 or two species hardy
> through Zone 6. I'll bet theres other beside the  ones we've already talked
> about Dracunculus, Arum (various species - I have italicum,maculatum,
> orientale and nigrum in Zone 5/6 -  others ? I lost dioscorides )
> Symplocarpus, Lysichiton, Arisarum etc. (not to mention Arisaema - that's
> another robin)
> 	How far north does anyone grow Helicodiceros ?
> 	These are just a start, let's get complete here:

I have several clones of Peltandra establishing, limited data so far but
it seems quite hardy and I've been told it will do well in zone 4. All of
my Zantedeschias except the recently-acquired "Hercules" are outdoors and
all but one of those (Z. pentlandii) have been for several years. 

Re Typhonium, there was a deafening silence a few weeks ago when I asked
some questions so I will risk repeating them here:

>While on hardy Typhoniums - Deni Bown, in the 3 paragraphs devoted to
>Typhonium in "Aroids", mentions 2 other species as "hardy": T. 
>diversifolium and T. alpinum. "It (T. diversifolium) is found in the
>Himalayas between 2500 m and 4300 m and so, like Arisaema flavum, is a
>near-alpine. The ability to grow at high altitudes is also seen in T.
>alpinum which is recorded as reaching 4000 m in China." 
>Can anyone comment on how hardy these species truly are? 4000+ meters is
>high enough that (anywhere much short of the equator) it implies some
>good frosts. 

Orontium should be hardy, but I don't have it and don't recall anyone else
talking about it. Why is it so unpopular?


-- Steve Marak

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