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  A titanum
From: "Wilbert Hetterscheid" hetter at worldonline.nl> on 2002.11.20 at 08:56:36(9618)

Do inspect this lil' one and see if it is o.k. then store it in loose soil.
Smaller tubers of this species probably don't like being totally dry.


From: "Julius Boos" ju-bo at msn.com> on 2002.11.21 at 01:17:37(9625)
Dear Harry,

I saw where Wilbert had replied, and he is correct re: not storing the tuber
in soil and slightly moist ( he IS Lord Phallus, after all! :--)>) but I
just thought I`d like to toss around and talk about the reason for keeping
this and some other Amorphophallus species from drying out completely.
This species grows in rain forest where VERY seldom if ever it would be dry
enough to induce dormancy, so it is presumably not adapted to withstand any
prolonged period of drought, or in the case when in cultivation being stored
dry. If you can provide year-long warmth, you may not even want or need
to provide a dormant period, as long as you can provide heat, moisture and
light, let it grow! I have experienced a similar thing with the genus
Dracontium, some Amazonian species such as D. spruceanum will not go dormant
when kept wet and warm, others that grow in a seasonal climate (such as D.
asperum from Trinidad, where there is a wet and a dry season) do go dormant
if allowed to dry off in the cool months.
Speaking of Dracontiums, I just
had a plant of D. spruceanum bloom, what a marvel of nature! It has a
huge, boat-shaped spathe about 16 inches long and twisted at the tip carried
on a peduncle as tall as the petiole, in this case about 4 ft. tall, the
spathe is mainly purple-black, but when opened the lower interior portion of
the spathe for say 5 " and which is not visible on the exterior, is colored
transparent white/cream, it resembles a cream 'sun-burst', and is said to
provide a light-trap to keep flies buzzing around inside the spathe at the
height of the spadix. It is events like this in my plant-growing moments
that make me estatic that I choose growing Aroids as ONE of my hobbies.
Good growing,

Julius Boos

From: Kiehlmann at gmx.de on 2002.11.24 at 09:37:36(9637)
I like to underline what Julius Boos has written.

About 12 years ago we ( my and I ) began with growing of Amorphophallus-
species first of all exclusively from SE-Asia. We had no knowledge of the
cultivation . But we had personal knowledge of the climatic conditions in
Malaysia and Sumatra, because we had made several trips to these countries.
It was out of the question that a dry period would be necessary.

And the Amorphos ( 3 forms or species? of the Am.beccarii-complex, Am.
manta ) grew well, went dormant individually and bloomed a.s.o. without
any dry period. We handled Am. prainii and especially a small specimen of
Am. titanum and of Am. gigas in the same manner without difficulties untill
today. The 2 latter species grow well but slowly, because we cultivate all
species indoors exclusively under inevitably relatively moderate temperature
conditions. One specimen of Am. prainii went dormant in humid soil for
3 years after blooming.

Even African species like Am. johnsonii and Am. eichleri, and Anchomanes
dalzielei also, grow and bloom without a dry period, though these species
originate from countries with distinct dry periods.

The advantage of a dry period seems to be the induction of synchronisation
of growth and especially of blooming for several specimen of the same
species. But this is not valid for all Amorphophallus-species.

Dietmar Kiehlmann

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