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hardy  Aroids)" <ARISAEMA-L at NIC.SURFNET.NL> Aroids)" <ARISAEMA-L at NIC.SURFNET.NL>
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From: Bonaventure Magrys <magrysbo at SHU.EDU>
Subject: Arisaema/Amorphophallus longetivity
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Here I'm forwarding parts of my exchange with Marcin Walter, a new member
of our group. Perhaps some of our members can contribute advice and
additional information to him:

Thanks Marcin,
...................................One paeonifolius tuber is starting to
form a point! As I said, I've sent out all but the 2 largest ones, the si=ze
of large grapefruit, and 2 tangerine sized ones. I'm defuinitely sending
you one of the bigger ones, if both start to grow indoors (before May) I
will not have space for them!
Tropical orchids, temperate bulbs, also are perennial/"immortal". New
growths form taking the place of old ones, which are left behind and die
off. The problen with sikokianum and other "humus epiphytes" is that
cultivation does not allow the natural progressision of new tuber formati=on
higher along the stem, atop the old tuber, soil level susidence in late
summer exposing the tuber surface during dormancy initiation, and a cover
of loose leaf litter during fall & winter. In spring this brweaks down to
rich humus which covers the awakening tuber and provides a substrate for
new root growth. Offsets/seedlings like wetter, more sheltered conditions.
The larger the tuber, the more "up" it likes to be. In nature, many of
these asian Arisaemas grow on hillsides or ravine banks. Definitely a dri=er
condition than my native Arisaema triphyllum here in eastern USA. Many
cultivators lift them for storage in winter, or have them in pots and mov=e
to a dry location, or cover the soil with a large tarp when it dries in
autumn. Cold is not the issue. Tropical tuberous aroids though grow in
response to the monsoon and go dormant because of a prolonged dry season.
Mediterranean region aroids (Arum, Arisarum, ect.) grow in response to co=ol
wet winters, and go dormant with warmth.
Glad you joined Arisaema-L! I've heard of a grower in Czechoslovakia (don='t
know which republic now) who has over 20 year old stands of Arisaema
fargesii and candidissimum in the garden! Maybe our members can find that
reference and you can visit or contact.
Czesc,
Bonaventure



"Marcin
Walter"              To:     <magrysbo at shu.edu>
<mwalter at polan       cc:
d.com>               Subject:     RE: short question

12/10/2001
04:52 PM





.....That's very interesting what you write. But it means that Amorph nev=er
dies!
There MUST be some limitations, I think.
In the meantime I read a lot of arhive post from Arisaema Enthusiast Grou=p
Discussion List. I remember one discussion about Arisaema Sikkokianum. It='s
life span is about 7 or 8 years, after that plant disappear - why is that
then?
Wheather here is rather ugly . We had -13 to -15 for few days, but sunny.
Now (10:25 PM) is much warmer 0 , but wet and sky with grey clouds. I'm n=ot
sure if A.paeoniifolius can teke it - you're the Expert!
Pozdrawiam!
Marcin

-----Original Message-----
From: magrysbo at shu.edu [mailto:magrysbo at shu.edu]
Sent: Monday, December 10, 2001 7:31 PM
To: Marcin Walter
Subject: Re: short question
.....From what I've seen in bulbous aroids, every year a new tuber grows
atop
the old one. the old tuber gets reabsorbed and can be seen as a patch of
dry skin at the bottom of the new one. Like a vine whose back portions di=e
as new groth goes forward, what you see every year is a brand new creatio=n.
The size of the growth it puts out, its vigor due to conditions and
nutrition, will influence the size of the next bulb (tuber).
How's the weather there? I can send you the paeonifolius tuber now if you='d
like. We seem to be having a warm spell here in eastern USA and the tuber=s
seem to have stabilized here in my desk drawer, no longer soft or drying
out too much.
Bonaventure

"MarcinWalter"              To:     "Bonaventure
Magrys"<magrysbo at shu.edu
Subject:     short question
12/10/01 05:14 AM
Czesc Bonek!
I have short question. Do you know what is Amorphophallus Konjac life spa=n?
I just realised that my A. Konjac's "Mother Bulb" is 10 or 12 years old. =I
wonder if it's geting old yet or is still young.
Pozdrawiam
Marcin Walter