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  Various Minimum Temperatures
From: Paul Tyerman ptyerman at ozemail.com.au> on 2001.05.28 at 11:17:27(6587)
Howdy All,

Is there a listing somewhere that of minimum temperatures required by the
various species of Amorphophallus? I am trying to find out which are the
tropical varieties and which will take frosts etc. I know that varieties
like bulbifer and konjac are fine in frost, but what others are? I'd like
to grow as many of these as possible as I find them utterly fascinating
(well actually... them, Arums, Arisaemas, Biarums, the list goes on)

I am also after similar temperature information for Alocasias, Colocasias,
Typhoniums and Xanthosoma species. I was reading back through some of the
stuff that I've saved regarding aroids and noticed that one person in Zone
5 mentioned that Typhonium giganteum was hardy there (I assume dormant in
winter?) so there are obviously some varieties that take the cold.

Basically I'm just trying to find out exactly how far I can let this
addiction take me before the aroids own the house in winter and "I'm"
sleeping outside in a pot!! . I'm only just starting to find out
that the certain species of Philodendrons, Typhoniums, Alocasias,
Colocasias are really something I can actually think about growing here
unprotected. I'd always thought of them as being "tropical".

Thanks in anticipation of any information or leads to any information. It
may be better to email me directly rather than clogging up the list with
unwanted information for those people who do not grow these things.

I hope no-one minds me asking what some would regards as such a "general"
question.

Cheers.

Paul Tyerman

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From: "Alan Galloway" alan_galloway at bellsouth.net> on 2001.05.28 at 19:20:21(6590)
Subject: Various Minimum Temperatures

>
> Is there a listing somewhere that of minimum temperatures required by the
> various species of Amorphophallus? I am trying to find out which are the
> tropical varieties and which will take frosts etc.

Paul, off the IAS web site, check out the list of hardy aroids,
http://www.aroid.org/horticulture/hardy.html

> I know that varieties
> like bulbifer and konjac are fine in frost, but what others are?

Here in Raleigh, NC, USA, USDA-zone#7, the following are also
cold hardy:
Amorphophallus napalensis
Amorphophallus odoratus

I'm testing/will be testing the following for cold-hardiness:

Amorphophallus henryii
Amorphophallus kisusianus
Amorphophallus albus

>
> I am also after similar temperature information for Alocasias, Colocasias,
> Typhoniums and Xanthosoma species. I was reading back through some of the
> stuff that I've saved regarding aroids and noticed that one person in Zone
> 5 mentioned that Typhonium giganteum was hardy there (I assume dormant in
> winter?) so there are obviously some varieties that take the cold.

It is extremely cold hardy, as is Typhonium roxburghii (formerly T.
diveracatum).

Alan

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From: "George R Stilwell, Jr." grsjr at juno.com> on 2001.05.28 at 19:20:41(6591)
Paul,

Not much help but Typhonium horsfieldii is not hardy in zone 7a.

Ray

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From: "James W, Waddick" jim-jim at swbell.net> on 2001.05.29 at 19:00:00(6601)
> noticed that one person in Zone
> > 5 mentioned that Typhonium giganteum was hardy there (I assume dormant in
> > winter?) so there are obviously some varieties that take the cold.
>
>It is extremely cold hardy, as is Typhonium roxburghii (formerly T.
>diveracatum).
>
>Alan Galloway

Dear all;
I have grown T. gigantea in Zone 5 for years, but have found
T divericatum/roxburghii marginal to tender; certainly not hardy. I
grow T. divericatum as a 'ground cover' in a very large potted Crinum
asiaticum. The pot is in full sun and setting in a deep saucer of
water in summer and MUCH dried in a sunny window in winter. Grows
like a weed. Blooms off and on all summer.

Jim W.

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From: Paul Tyerman ptyerman at ozemail.com.au> on 2001.06.13 at 07:59:56(6695)
Howdy All,

Just a quick note to say Thanks for the information regarding
cold-hardiness of various aroids.

Has been a great help to me, particularly the information on the IAS site
(which I didn't know about).

Thanks to all who responded. I now know there are far more aroids that I
can grow here outside . Now I just have to find them.

Out of interest.... what is the minimum temperature that anyone has grown
Amorphophallus paeonifolius outside without frost or cold protection? Is
that with Snow cover or not (I think I've heard that Snow cover actually
helps insulate and isn't as bad as just plain cold?).

Thanks again Peoples.

Cheers.

Paul Tyerman

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