----- Original Message -----
To: "Discussion of aroids"
Sent: Saturday, November 12, 2005 10:16 PM
Subject: [Aroid-l] Amorph and Arisaema dormancy questions
With all the recent questions regarding treatment of tubers over the
course of dormancy/winter, I figured I would join in.
First, my Amorph. gigas that I purchased this year is going dormant and I
would like to know if this is one of the species that should be kept in
the pot with barely damp soil or if it can be stored "dry". I prefer to
remove the tubers of my other species from the soil, but thought I
read/heard some time ago that A. gigas tubers are intolerant of this
My Amorph. pygmaeus that I purchased in fall '04 as a dormant tuber never
emerged from dormancy all year. After purchasing it, I kept it unpotted
(stored dry) until late spring when my other Amorphophallus species tend
to come out of dormancy. By mid-summer, I hadn't noticed anything
happening, and from that time on I kept digging down and checking for any
progress. The tuber always appeared fine, just no root development or any
other sign it was going to break dormancy. It still appears fine, and I am
wondering if I should keep it warm potted up and continue water it
moderately to see if it will decide to come out of dormancy over the next
several months, or if I should dig it up and store it dry with my other
species and try again next year. It was kept side by side in identical
conditions with my other species of potted Amorphophallus which all
performed normally. Any thoughts?
My third question is similar to the last one, but involving Arisaema
speciosum. I also purchased this as a large blooming size tuber last fall,
planted it in the ground outdoors, and it also never emerged from
dormancy. I did notice when I dug down to check on it in early summer that
it did grow roots, which remained until the time I dug it up to bring it
for winter storage a few weeks ago. The central conical growing point did
grow very slightly (maybe 1/2 inch) early on, then just stayed that way
the rest of the summer. The other species of Arisaema obtained at the
same time and planted nearby in identical conditons all came out of
dormancy and did fine this year.
What am I doing wrong? Any help would be greatly appreciated.
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