Re: [Aroid-l] Temperature requierements for Helicodiceros

From: Christopher Rogers <crogers at ecoanalysts.com> on 2010.02.22 at 17:11:03(20638) 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. My 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! Christopher +More D. Christopher Rogers Senior Invertebrate Ecologist/ Taxonomist ((,///////////=======< branchiopod@gmail.com EcoAnalysts, Inc. 1.530.383.4798 P.O. Box 4098 Davis, CA 95616 USA Invertebrate Taxonomy Endangered Species Ecological Studies Bioassessment Invasive Species Plankton Phycology IDAHO ∙ CALIFORNIA ∙ MISSOURI ∙ PENNSYLVANIA ∙ VANCOUVER WWW.ECOANALYSTS.COM ∙ ECO@ECOANALYSTS.COM 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 Aroiders, thanks for your replies to my inquiry and sorry for my late reply…. It seems that Christopher is lucky to have the right mediterranean climate for Helicodiceros. Dan’s 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.’s 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 –15 °C (5 °F) I do not expect too much. Susan’s 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: http://culturesheet.org/araceae:helicodiceros:muscivorus 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, 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 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 Å“C (46 Å“F) 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, Bernhard. No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.432 / Virus Database: 271.1.1/2653 - Release Date: 01/28/10 14:55:00 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.435 / Virus Database: 271.1.1/2703 - Release Date: 02/22/10 07:34:00 ------=_NextPart_000_000A_01CAB39E.F5BAB8A0 _______________________________________________ Aroid-L mailing list Aroid-L@www.gizmoworks.com http://www.gizmoworks.com/mailman/listinfo/aroid-l --==============u59317249419658793==--

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