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[Aroid-l] Determining Amorphophallus storage needs
From: aroidgrower at gmail.com (John Ludwig) on 2007.09.01 at 17:57:45(16194)|
Thank you Wilbert,
Thank you wilbert for clearing this up for me. I know now that I
should be thinking differently on this matter.
It is obvious to me now that I need to get a reprint of Vol. 19 as reference.
I look forward to any published works of Mr. Avent and Mr. Galloway on
On 9/1/07, Wilbert Hetterscheid wrote:|
> Hi John and other peoples,
> I cannot confirm your observation. In fact I have noticed quite the
> opposite. In my collection, the ones that need continuous soil and/or
> watering always have roots spread all over the tuber that usually are
> healthy when the leaf has already died down. The ones that need dry
> conditions and have lost their leaves, are usually also without roots or
> have dead or dying roots.
> My experience and that of others written to me, have changed my views on
> dormancy issues in Amorphophallus quite dramatically over the years since my
> publication with Ittenbach in Vol. 19 of Aroideana.
> Generally it seems that species from (West-)Central Africa, West Malaysia,
> Borneo, Java, Sumatra, S. & SE China and N. Vietnam need to be kept in soil
> all the time. They tend to have rather short dormancies or nearly none at
> all. They are from very wet areas (everwet tropical). During growth they can
> hardly be "overloaded" with water during watergift. Species for which this
> works good are:
> excentricus (is also quite drought resistant)
> glossophyllus (also quite drought resistant)
> interruptus (also quite drought resistant)
> koratensis (when young)
> palawanensis (can also be stored dry)
> scaber (only when young)
> Unfortunately, this behaviour makes them the more difficult species to grow
> (except the ones from N. Vietnam, S. & SE China and A. hottae). The ones
> that have a prolongued dormancy are usually the stronger ones in cultivation
> and need less humid conditions.
> Then the smallest of species also appreciate not to be bone dry but they
> must also be watered carefully and not become too wet. They too tend to have
> hardly any appreciable dormancy and flower immediately after leaf shed or
> alongside mature leaves:
> I think Tony Avent and Alan galloway may have plans to pubblish on this. In
> case the IAS board decides to reprint vol. 19, I will add a text on this
> subject as introduction.
> Of course it may be that under local circumstances at individual people's
> places, plants may have a deviating behaviour. But this is merely a general
> > -----Oorspronkelijk bericht-----
> > Van: aroid-l-bounces at gizmoworks.com
> > [mailto:aroid-l-bounces at gizmoworks.com] Namens John Ludwig
> > Verzonden: vrijdag 31 augustus 2007 11:39
> > Aan: Discussion of aroids
> > Onderwerp: [Aroid-l] Determining Amorphophallus storage needs
> > I have noticed one similarity in determining a tuber's need
> > to be stored in soil or dry. I have noticed that the tubers
> > that need storage in soil are predominantly the ones that
> > grow their roots from the top of the tuber.
> > Is this a correct observation and can I apply this rule of
> > thumb to all Amorph's?
> > Are there exceptions that I am currently unaware of?
> > I have also noticed that all of the ones that I can store dry
> > seem to have a smooth skin that seem to be shiny\waxy in appearance.
> > I have also weighed my tubers to see if they have been losing
> > weight due to dessication.
> > When a new species is discovered, How are it's needs determined?
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