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  Amorphophallus titanum leaf height inquiry
From: bobrien at gustavus.edu (Brian O'Brien) on 2008.06.23 at 03:59:03(17911)
Hi All,
Our largest Titan appears to have reached maximum leaf height for
its current growth cycle. It's about 12 feet high, just below the
greenhouse roof level. My question for other growers of this plant
is: does the plant somehow detect the presence of a barrier, and
stop vertical growth, or will it, the next time that it produces a
leaf, try to push the leaf through the greenhouse roof? We were
concerned about the latter possibility this time, and it seems oddly
coincidental that the leaf stopped growing vertically just at the
point when we hoped that it would do so.
Here's a link for the latest update, including some photos of the
leaf scaled to


From: bill.weaver at hp.com (Weaver, Bill) on 2008.06.24 at 04:23:05(17934)
I'd say you got lucky this time. My experience has been that the leaf will smash itself up against the roof.
Unfortunately, in my greenhouse that means that any part in contact with the roof got burned.

I have tried to shorten the leaf by hanging a grow light just inches above the emerging leaf and raising it
as it grew. It didn't seem to make any difference.

I also tried tipping the pot over hoping that it would grow at an angle before opening. No luck there either.
The stem just bent itself at 90 degrees and kept on growing straight up.

Bill Weaver

From: ju-bo at msn.com (ju-bo at msn.com) on 2008.06.24 at 09:41:16(17937)
> From: bill.weaver at hp.com
> To: aroid-l at gizmoworks.com
> Date: Tue, 24 Jun 2008 04:23:05 +0000
> CC: bobrien at gac.edu
> Subject: Re: [Aroid-l] Amorphophallus titanum leaf height inquiry

Dear Brian,

I agree w/ Bill. One crazy idea (and I mean this seriously) is to consider digging a hole in the green house floor, and placing the pot down into it, and so providing a further 4 ft. of so of room for the leaf to grow vertically, it WILL try to push itself through the g/house roof.

Good Growing,


From: StroWi at t-online.de (StroWi at t-online.de) on 2008.06.24 at 10:30:45(17939)
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