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#1
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Vanda question
Live in central OH and keep several vandas in my conservatory on a humidity
tray. The leaves turn yellow and fall off then it dies. What else do they need? Dendrobiums, cattelayas, phalenopsis live in the same room and are thriving. Varigated papheopedolums have healthy foliage but don't bloom. Any suggestions? |
#2
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Vanda question
Alicia Moïse wrote:
Live in central OH and keep several vandas in my conservatory on a humidity tray. The leaves turn yellow and fall off then it dies. What else do they need? Dendrobiums, cattelayas, phalenopsis live in the same room and are thriving. Varigated papheopedolums have healthy foliage but don't bloom. Any suggestions? I also live in central Ohio and grow indoors during the winter, in three growrooms; my humidity is usually too low there. You don't say how much light the vandas are getting or in what/how they are potted. I grow mine potted in plastic pots with large bark mixed with sponge rock #4 (the largest I can get) and water them as often as everything else, usually every 4/5 days or so. They sit immediately under the 400W light. I have even bloomed a few: http://www.orchidcourt.com/vandpics.html Perhaps yours aren't getting enough water. Vandas are actually waterloving plants; they just don't like to be too wet around the roots at night. Don't know if you're a member of the Central Ohio Orchid Society http://www.coosinfo.info/ but there are a lot of long-time growers there who are more than happy to help out with whatever insight and experience they may have, and even more newer growers full of excitement and questions. Of course there are other possible problems: thrips, disease, etc. Hard to say for sure without more info and seeing the plants. |
#3
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Vanda question
Alicia,
Our orchid society, (Orchid Soc. of MN), recently had a symposium and one of our members spoke on her success with Vandas. Besides lots of light she also mentioned potting and water. For potting she uses large chunks of bark (sounded like 1.5 to 2 inches) and places them on edge in the pot around the roots. This lets the water drain away quickly and the bark lasts a longer period of time while giving some support and higher humidity to the roots. She waters with warm water. Her reasoning is that the roots have a waxy coating that doesn't allow water out but also doesn't let it in. Cold water doesn't soften the wax. She also waters three times, maybe 5 minutes apart. She wants the roots to turn a bright green. If you can't get them to take water then submerge them in a pail of water for a while. This maybe necessary if they are really dried out. Bob "tennis maynard" wrote in message ... Alicia Moïse wrote: Live in central OH and keep several vandas in my conservatory on a humidity tray. The leaves turn yellow and fall off then it dies. What else do they need? Dendrobiums, cattelayas, phalenopsis live in the same room and are thriving. Varigated papheopedolums have healthy foliage but don't bloom. Any suggestions? I also live in central Ohio and grow indoors during the winter, in three growrooms; my humidity is usually too low there. You don't say how much light the vandas are getting or in what/how they are potted. I grow mine potted in plastic pots with large bark mixed with sponge rock #4 (the largest I can get) and water them as often as everything else, usually every 4/5 days or so. They sit immediately under the 400W light. I have even bloomed a few: http://www.orchidcourt.com/vandpics.html Perhaps yours aren't getting enough water. Vandas are actually waterloving plants; they just don't like to be too wet around the roots at night. Don't know if you're a member of the Central Ohio Orchid Society http://www.coosinfo.info/ but there are a lot of long-time growers there who are more than happy to help out with whatever insight and experience they may have, and even more newer growers full of excitement and questions. Of course there are other possible problems: thrips, disease, etc. Hard to say for sure without more info and seeing the plants. |
#4
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Vanda question
Alicia: The most common causes of excessive leaf drop in vandas are (1)
too dry; (2) too cold. You should, however, expect most vandas to drop 1-2 bottom leaves each winter. Some more than others, and as best I can figure, genetics plays a big role in that. On the too cold, most really like to be warm. We heat to 55F and still have more leaf drop than we would like, in winter. But we have to compromise, since we don't have a whole separate vanda house (although we do have a separate watering zone for them, that's a must). Being indoors, you probably have to pot your vandas, which means you can't do what we do to prevent "too dry" (make it "rain" on them for 12 minutes every am). But the poster who mentioned getting the roots to turn green each time you water was right on target. It might also help to feed the vandas more, compared to your other plants. The more water, the more food, is a good rule of thumb. I don't think that low light would cause the leaf drop, although it will interfere with blooming. Good growing, -- Kenni Judd Juno Beach Orchids "Alicia Moïse" wrote in message t... Live in central OH and keep several vandas in my conservatory on a humidity tray. The leaves turn yellow and fall off then it dies. What else do they need? Dendrobiums, cattelayas, phalenopsis live in the same room and are thriving. Varigated papheopedolums have healthy foliage but don't bloom. Any suggestions? |
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