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  • 3 Post By panam
  • 1 Post By Cjcorner

In-home growing: thin-leaved dendrobiums & renanthera

This is a discussion on In-home growing: thin-leaved dendrobiums & renanthera within the Genus Specific forums, part of the Orchid Culture category; I have not done well with a few dendrobiums I've tried: Den sulawesiense x glomeratum, ...

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  1. #1
    poetiscariot's Avatar
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    Default In-home growing: thin-leaved dendrobiums & renanthera

    I have not done well with a few dendrobiums I've tried: Den sulawesiense x glomeratum, Den mingle's sapphire, and Den laevifolium all got too dry and gave up on me. The first two, I tried early on, and now I'm a better orchid-carer, but I can't find those exact hybrids being sold anywhere to test them again. I got a Den laevifolium a few months ago, though, which did not work out. I think I've stabilized a little Haraella retrocalla that wasn't doing well by moving it from seedling bark into sphagnum, and now I'm feeling like trying again with some more delicate dendrobiums -- looking at maybe a Den lawesii and/or a Den sulawesiense. I got a super cool tip here about growing Aerides in clear pots and keeping an eye on the condensation levels inside the pot, so I'm wondering if anyone has similar tips about these kinds of dendrobiums.

    Secondly, renanthera? Can these be grown well without soaking them? There's no way I'll probably ever do that. But -- you can laugh at this -- I had an extraordinarily compelling dream in which I found some kind of deep red-orange renanthera in full bloom, hidden away on top of a shelf in my apartment and now I want to get one. . . if I might be able to grow it.

    My conditions: I have a humidity tray and a grow light in my living room. I mist heavily daily and water through the pots intermittently. Cattleya and oncidium types generally do really well for me, and everything else kind of bleeds out from that center.

  2. #2
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    panam is offline Senior Member
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    Does anyone have any ideas to help Victoria? Let's see if we can make this dream come true for her!

  3. #3
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    Maybe you could try the semi hydro potting for the dendrobiums and oncidiums. The Renanthera can be potted with large chunks of charcoal and watered every other day. Or there is the glass vase with the smaller vanda types such as Renanthera. You sit the plastic basket into the neck of a vase so the plant is suspended with the roots going into the bottom of the vase. Every few days you fill the vase with warm water to the base of the plant, allowing the roots to soak up water for five or ten minutes. Then you pour the water out of the vase and sit it back in a nice sunny window area that is as warm as it is sunny. Vanda types must be kept warm, especially if their roots are wet. I have heard people have fabulous success with the vase method. Best of luck...there are articles on how to pot with semi hydro.

  4. #4
    poetiscariot's Avatar
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    I think I may have figured out how to do my dendrobiums -- I have a couple angraecoids that the internet says should only ever be potted in large, loose bark, but I put them in sphagnum to keep them damper and they seem to be doing well now. Well enough that I'm going to get one or two even fussier ones in a couple weeks, anyway. Maybe those more delicate dendrobiums could benefit from similar treatment?

    OR semi-hydro, which I haven't yet tried on anything. That could be exciting, though. New growing tricks .

    Makes me ask, then, why not semi-hydro for a Renanthera? Do they need their roots to be out in the air like Vandas' do?

    And. . . thank you for the ideas and advice!

  5. #5
    Cjcorner's Avatar
    Cjcorner is offline Senior Member
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    Renanthera like their roots to dry quickly. You can put them like the other vanda with their roots hanging, or you can put them in a large grade charcoal. I'm guessing they would mount on wood nicely as well.

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