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Your observation thatHelicodiceros stops the growth until they get low temperatures wouldindicate a sort if cold requirement for the "normal" growthcycle.
It would be intersting to seewhat would happen if one of these plants would be shifted to agreenhouse where temperatures would not drop.
Maybe we get a reply by a fellow aroider who growsHelicodiceros (or tried to grow Helicodiceros) above 15 or 20 C° allyear round.
Then there is still thequestion, if the species needs the low temperatures to induce flowerdevelopment in a meristem. Or in other words, if it would never flower,if kept at high temperatures.
Happygrowing,
Bernhard.
-----Original Message-----
> Date:Mon, 22 Feb 2010 18:11:03 +0100
> Subject: Re: [Aroid-l]Temperature requierements for Helicodiceros
> From: ChristopherRogers
> To: "'Discussionof aroids'"
>
Hello, Bernhard!
My experience is that Helicodiceros goes dormantin response to high temperatures and lack of rain, while dormancy isbroken by the cold of winter, but occasionally from the onset of rain. My plants will break dormancy and start to grow in the autumn if Iwater them, however, they stop growing just below the soil surface. Oncethe temperatures drop down around freezing, they begin growing past thesoil surface and into the full vegetative stage. I hope I am answeringyour question. Please let me know if I am still missing your point.
Happy days!
Christopher
D. Christopher Rogers
Senior Invertebrate Ecologist/ Taxonomist
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From:aroid-l-bounces@gizmoworks.com [mailto:aroid-l-bounces@gizmoworks.com]On Behalf Of StroWi@t-online.de
Sent: Thursday,February 18, 2010 11:04 PM
To: Discussion of aroids
Subject: Re: [Aroid-l] Temperature requierements forHelicodiceros
Aroiders,
thanks for your replies to my inquiry and sorry formy late reply….
It seems that Christopheris lucky to have the right mediterranean climate for Helicodiceros.
Dan’s experience seem to indicatethat successful growth under artificial light is not possible.
The different experiences with thehardiness in zone 6 made by Steve, Tony and Jim W. might have to do withthe very growing conditions. Growing it on a sloped bank in JimW.’s casemight help to keep it dryer in the cold season and the necessity of hotsummers as indicated by Tony might be another important point.
I live in zone 7 (near Hannover,Lower Saxony, Germany) and planted some small offsets outside lastautumn and will see what comes out of it this spring, but having a coldwinter with frost down to –15 °C (5 °F) I do not expect too much.
Susan’s comments aboutgrowing it in a cold greenhouse, seem to show that those conditions arenot suitable to bring Helicodiceros to bloom in cold wintergarten.
However, it might be possible.
You might have a look at this site:
http://culturesheet.org/araceae:helicodiceros:muscivorus
From the pictures itlooks like a cold wintergarten and I hope that I can give my plantssimilar conditions.
This season I used deep pots and a rich organicbased potting mix as recommended by the culturesheet description and theplants never looked so good before (see picture).
From my initial request there is one point still inquestion:
Does Helicodiceros needthe colder temperatures for the switch from vegetative to generativegrowth, in other words, is there a cold requirement for the induction of an inflorescence?
Still curious, and thanks again to all of you whoreplied,
Bernhard.
From:aroid-l-bounces@gizmoworks.com [mailto:aroid-l-bounces@gizmoworks.com]On Behalf Of StroWi@t-online.de
Sent: Wednesday,January 27, 2010 1:29 AM
To: aroid-L
Subject:[Aroid-l] Temperature requierements for Helicodiceros
Aroiders,
from the temperatures andseasonal rainfall on Sardinia I guess that Helocodiceros grows from lateSebtember to April or May with the maximum of rainfall in November andDecember and temperatures down to 8 œC (46 œF) in December toFebruary.
I would liketo know, wether the low temperatures in the growing season areneccessary or if Helicodiceros could be grown (and flower) at highertemperatures as well.
Looking forward to any comment,
Bernhard.
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