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  Amorphophallus Propagation
From: "WEAVER,BILL (HP-USA,ex3)" bill_weaver at hp.com> on 2001.10.11 at 14:43:03(7623)
Someone on this list had previously mentioned the possibility of
stem (or more precisely petiole) propagation of Amorphophallus
species. I was wondering if I would have any success with leaf(let)
propagation of some of the larger species? Specifically I was
planning to remove a single leaflet from my A. titanum, treat it
with rooting gel, bury the cut end in potting soil and put the
whole thing in a plastic bag. Would I and up with a new plant
or just mush?

Thank You for any help

Bill Weaver

From: Clark Riley drriley at mypcr.com> on 2001.10.11 at 20:15:16(7629)
I have tried petiole propagation of Amorphophallus titanum thrice
with no success. Doesn't mean it can't be done, just my results. I
will keep trying.

Clark Riley

From: "Petra Schmidt" petra at plantdelights.com> on 2001.10.18 at 08:15:31(7638)
I've done leaf cuttings in the past (at MO and now at PDN) and some species
do very well; patience is the key because with or without rooting hormone,
the new leaf/tuber that forms is slow-going. I've found certain areas of
the leaf "take" better than others and that keeping the cut leaf material
ever-so-slightly misted works better than watering with a typical
water-breaker head; therefore, if you have a mist chamber or automated
misting system, you'll increase your success rate. I've also tried petiole
cuttings and am not quite convinced they'll "take" as well as the leaf
cuttings but I'm finding that partially cutting through the full-length of
the petiole (keeping the petiole whole) and laying the petiole onto slightly
damp milled spaghnum (covered with a plastic domed lid) seems to work; the
cuts slowly callous and form tubers. In any case, this is still an
experiment in progress and I've tried quite a few different cuts and methods
of rooting leaves and petioles. The really exciting news is that this
spring I tried tuber cuttings...yes, tuber cuttings; diced and sliced and
chopped and cut those tubers into chunks and pieces and bits; I won't go
into details right now on this but I've recently dug up those tubers and
have seen very good results. Those that survived put out good growth for
the summer and the new tuber that formed is perfectly normal; those tubers
that took longer in producing new growth are just now forming leaf buds,
some with 2-3-4 buds per cut-tuber...it was exciting to see these
slower-recovering cut pieces because I could look at the cut pieces and see
what was happening with the new tuber...anyway....I'll continue this process
next season and will keep you posted.

From: StroWi at t-online.de (StroWi) on 2001.10.18 at 21:53:27(7644)

do you maybe have some pictures of the leaf and/or petiole cutting method so
that it is more understandable for me (and mybe others) how this kind of
vegetative propagation works with Amorphs?
Or would you know a site where the methods are visualized?

I heard from Wilbert before that these methods are also used with A.titanum, but
I am afraid I did not get it how it is really done.

It would be great to get some advise.


From: Durightmm at aol.com on 2001.10.18 at 22:54:03(7645)
It seems that more success propagating Amorph leaves are from those with heavy texture and noticably enlarged axils. It is trickier to get otheres to respond favorably. As for tubers they are much like DIOSCOREA that seem indestructible. D. elaphantopis tubers survived the mower. They grow in shallow soil and under pine trees exceptionaly well. It seems reasonable that as with caladiums most ropical tubers respond to disecting Joe

From: Betsy Feuerstein ecuador at midsouth.rr.com> on 2001.10.19 at 08:26:35(7646)
Joe, your Dioscorea can be grown from a stem cutting. It takes one heck
of a long time, but I vouch from personal experience that it can be done.
I did it before I knew that it was not supposed to be done. Someone had
one I wanted and I remember asking, does that grow from cuttings and he
gave me a cutting to get me off of his back for wanting a tuber. It worked.
I still have the plant.
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