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re questions about Amorphophallus titanum

  • Subject: re questions about Amorphophallus titanum
  • From: Scott Radford <s.rad4d@ymail.com>
  • Date: Wed, 21 Jul 2010 17:18:50 +0000 (GMT)

Hi Nancy

Welcome the the wonderful IAS from another relative newcomer.

I grow mainly Colocasias and Alocasias and some other aroids. From my experiences with similar condition corms of these species to your own then I would try the following:

Firstly cut all the mushy infested areas off right back to firm material then treat the corm with a fungicide. I would not leave it in the soil but leave at ambient room temperature resting on top of (or just semi submerged in) DRY compost (I use a peat free growing medium myself)

Then sit its container in some water to encourage the root growth down to find that water - do not water from above. Colocasias and Alocasias always respond to heat from below too, but with a 20lb corm that could be unfeasible. Hopefully that will encourage things to begin again with a fresh sprouting from the viable centre of the corm.

Good luck with whatever you try


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To: aroid-l@www.gizmoworks.com
Sent: Wed, 21 July, 2010 18:00:11
Subject: Aroid-L Digest, Vol 72, Issue 22

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Today's Topics:

  1. questions about Amorphophallus titanum (Nancy Greig)


Message: 1
Date: Tue, 20 Jul 2010 19:40:33 -0500
From: "Nancy Greig" <ngreig@hmns.org>
Subject: [Aroid-l] questions about Amorphophallus titanum
To: <aroid-l@www.gizmoworks.com>
    <2D3D008E4FFE73479FA3956C548E97CAE549B2@mail.internal.hmns.org" href="mailto:2D3D008E4FFE73479FA3956C548E97CAE549B2@mail.internal.hmns.org">2D3D008E4FFE73479FA3956C548E97CAE549B2@mail.internal.hmns.org>
Content-Type: text/plain; charset="us-ascii"

Hello!  I just joined the IAS and I am happy to know there is such a
group.  Currently we have an A. titanum about to bloom - perhaps
tonight, finally!  We also have a corm (about 20 lbs) of a second plant
acquired in 2006 that just recently went dormant.  It seems to be having
some problems - some mushy areas and a bit of whitish fungal growth
on/in the mushy areas.  But it is not mushy throughout - the central
portion where the growing tip emerges seems to be fine.  Parts of the
bottom of the corm are mushy, and there are some good-sized craters in
the sides.  When we unearthed it recently (when the leaf died back) we
found many small snails in mushy areas and also some tiny white insects.
There was an orangish mass of fungus, mushed up corm, and insects on the
sides and bottom when we dug it up.  Now it sort of looks like a tooth
with cavities...  Is there anything we can do?  We would hate to lose
this plant.  David Hunt (orchids) told us to spray it with Consan triple
action 20...  Any thoughts?  Should we keep it completely out of the
soil (and at what temperature/humidity)?  Normally we have left the
tubers in soil in a pot but not watered them for several months while
they are dormant...

Are people familiar with the list of "publicised titan arum blooms" on
wikipedia?  I assume someone British (from Kew) puts this together?  I
see from the list that several institutions have plants that bloomed/are
blooming this year.  It seems that June/July is prime bloom time.
However, as noted our second plant is on a totally different cycle.  How
common is this?

Thank you - I look forward to being a member of this group!


Nancy Greig

Director, Cockrell Butterfly Center

Houston Museum of Natural Science

5555 Hermann Park Drive

Houston, TX  77030-1799

Tel 713-639-4742


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