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  Am.dormancy
From: Kevin & Ali <n9730000 at cc.wwu.edu> on 1998.10.05 at 06:10:32(2653)
Hello!
I live in Bellingham, Wash. and its beginning to get cold. I have
many Amorphophallus konjac and A.bulbifer outside in 5 gal. pots. Some
have sprouted (from tubers) as recently as 1 month ago. I do not have
the space indoors and would like to force them into dormancy. Would it
be better to let the cold send them into submission or to let them go
dry? (Cold being no lower than 25 deg.F)
Thanks alot!
Kevin
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From: Don Burns <burns at mobot.org> on 1998.10.05 at 06:55:57(2654)
> Would it be better to let the cold send them into submission or to let
> them go dry? (Cold being no lower than 25 deg.F)

Kevin,

Your konjacs are still awake most likely because they have not developed
mature tubers. My vote is to keep them warm and awake to assure that tuber
growth has taken place. Once tubers have grown they probably will go
dormant on their own. Without tubers you will have no konjacs next
year!

Don

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From: Michael Marcotrigiano <marcotrigiano at pssci.umass.edu> on 1998.10.05 at 08:57:14(2655)
In my experience Amorphophallus konjac behave like a corm, rather than the
tuber everyone else says it is. The corm gets smaller as the leaf emerges
and at some point it is near gone, to be replaced by a corm above it that
will be bigger each year under good culture. If your plants are just
getting going I don't know if you are risking the corm letting them dry.
You might want to dig one up and see if it has shruken down much. You may
be going back in size by letting it go dormant now. Your alternatives are
not great since 25F may be lethal and if not, is not going to support any
growth at all. Too bad you don't have indoor space or a greenhouse. Next
time you get corms try start them early (indoors?) and get the longest
seasono of growth out of them. I have a 10yr old konjac that peaked this
year with a leaf 41/2 feet tall, 5 feet wide, and a base petiole diameter of
4 1/2 inches. It came from a one inch corm and has increased in size each
year, flowering the past 4 years.

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