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Re: Temperature requierements for Helicodiceros

  • Subject: Re: Temperature requierements for Helicodiceros
  • From: Christopher Rogers <crogers@ecoanalysts.com>
  • Date: Mon, 22 Feb 2010 09:11:03 -0800

Hello, Bernhard!


My experience is that Helicodiceros goes dormant in response to high temperatures and lack of rain, while dormancy is broken by the cold of winter, but occasionally from the onset of rain. ÂMy plants will break dormancy and start to grow in the autumn if I water them, however, they stop growing just below the soil surface. Once the temperatures drop down around freezing, they begin growing past the soil surface and into the full vegetative stage. I hope I am answering your question. Please let me know if I am still missing your point.


Happy days!




D. Christopher Rogers

Senior Invertebrate Ecologist/ Taxonomist




EcoAnalysts, Inc.


P.O. Box 4098

Davis, CA 95616



Invertebrate Taxonomy

Endangered Species

Ecological Studies


Invasive Species






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 for Helicodiceros



thanks for your replies to my inquiry and sorry for my late replyâ.


It seems that Christopher is lucky to have the right mediterranean climate for Helicodiceros.


Danâs experience seem to indicate that successful growth under artificial light is not possible.


The different experiences with the hardiness in zone 6 made by Steve, Tony and Jim W. might have to do with the very growing conditions. Growing it on a sloped bank in JimW.âs case might help to keep it dryer in the cold season and the necessity of hot summers 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 last autumn and will see what comes out of it this spring, but having a cold winter with frost down to â15 ÂC (5 ÂF) I do not expect too much.

Susanâs comments about growing it in a cold greenhouse, seem to show that those conditions are not suitable to bring Helicodiceros to bloom in cold wintergarten.


However, it might be possible.

You might have a look at this site:


From the pictures it looks like a cold wintergarten and I hope that I can give my plants similar conditions.


This season I used deep pots and a rich organic based potting mix as recommended by the culturesheet description and the plants never looked so good before (see picture).



From my initial request there is one point still in question:


Does Helicodiceros need the colder temperatures for the switch from vegetative to generative growth, in other words, is there a cold requirement for the induction of an inflorescence?


Still curious, and thanks again to all of you who replied,


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




from the temperatures and seasonal rainfall on Sardinia I guess that Helocodiceros grows from late Sebtember to April or May with the maximum of rainfall in November and December and temperatures down to 8 ÅC (46 ÅF) in December to February.


I would like to know, wether the low temperatures in the growing season are neccessary or if Helicodiceros could be grown (and flower) at higher temperatures as well.


Looking forward to any comment,


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