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Are these orchids in need of physan?

This is a discussion on Are these orchids in need of physan? within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; Hello, Two of my orchids have leaf...problems? Just developing. One has a few bottom leaves ...

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  1. #1
    Locriana's Avatar
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    Default Are these orchids in need of physan?

    Hello,

    Two of my orchids have leaf...problems? Just developing. One has a few bottom leaves turning dry and brown, with dark splotches. The other has leaves turning yellow, first from the outsides, then the centers, some splotching there too. Anyone know what this means?

    I've ordered some physan but have never used it before. The warnings scare me! Do I need to use it on these orchids? If so, is spraying them enough? Should I cut off the discolored leaves?

    I've only had these orchids for a couple months, purchased from a very reputable nursery in town, which seems a lot of orchids. Each appear to have somewhat different potting mixtures, of the usual proper types of ingredients. So it seems they know what they are doing re potting. I have been watering these orchids approx every ten days, by pouring water through them and letting them drain. They seem to drain quite well, the potting mixtures don't hold water, yet they stay slightly moist when you push your finger down into the mix.

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    Thanks for any help saving my orchids!

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    Seems to me that these are simply the old pseudobulb leaves doing what they do and naturally dying off. Just remove the leaves and let the plant dry out before watering again. If you repot don't fertilize for at least 8 weeks.

    Ed

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    Thanks, that's a relief. How do you suggest I remove the leaves? They seem firmly attached. Should I cut them near the base? Dust the cuts with cinnamon?

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    Personally, I leave them on the plant until they fall off naturally when they are just dying off from age. I don't like to make cuts that aren't necessary. As far as safety issues with Physan, I was nervous about it at first. Reading the booklet material, I noticed that the solution is recommended as a sanitizing hand dip for cigarette smokers. That implies that the majority of the hazard warnings are referring to the concentrate. Don't get me wrong. I still avoid skin contact and breathing fumes/mist of the solution...just as I would any "household chemical". But I most CERTAINLY wont open the bottle without heavy duty gloves and a sink in close proximity.
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    Quote Originally Posted by Locriana View Post
    Thanks, that's a relief. How do you suggest I remove the leaves? They seem firmly attached. Should I cut them near the base? Dust the cuts with cinnamon?
    If I have some leaves that need removing for aesthetic or show reasons I simply nip the leaf off with a pair of scissors or such and seal the small clean cut with a drop of wood glue applied by a finger tip. This ,to me, is a lot easier than using any other thing such as herbal remedies and sulphur etc., I have been doing this for years and have not had any problems.
    Best of luck--

    Ed

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    Ed, that's a very interesting idea there, I may try it. Though cinnamon is easier to get to here -- for wood glue I'd have to go out to the barn..... ;-)

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    Quote Originally Posted by Locriana View Post
    Ed, that's a very interesting idea there, I may try it. Though cinnamon is easier to get to here -- for wood glue I'd have to go out to the barn..... ;-)
    Elmer's has wood glue in a bottle

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    I wouldn't use physan on these. They don't appear to be diseased. If you look at picture #3 you can see that the PB are all shriveled, meaning lack of water. That just might be your problem. Orchids in bark need water more often than every 10 days. Good luck

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    Quote Originally Posted by ischel1 View Post
    I wouldn't use physan on these. They don't appear to be diseased. If you look at picture #3 you can see that the PB are all shriveled, meaning lack of water. That just might be your problem. Orchids in bark need water more often than every 10 days. Good luck
    Yes, give the roots a quick check and make sure everything is okay there. Good growing!

    cheers,
    BD

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    Quote Originally Posted by ischel1 View Post
    I wouldn't use physan on these. They don't appear to be diseased. If you look at picture #3 you can see that the PB are all shriveled, meaning lack of water. That just might be your problem. Orchids in bark need water more often than every 10 days. Good luck

    The older pseudobulbs were shriveled when I bought these orchids -- the newer bulbs are plump however. When I push a finger down into these, they still feel moist -- doesn't that mean I shouldn't water them yet? We did water them once a week after we got them, but I read something here about overwatering, and how if it feels moist it's not time to water yet. Some clarification here would be helpful!

    Many thanks!

    Quote Originally Posted by Brutal_Dreamer View Post
    Yes, give the roots a quick check and make sure everything is okay there. Good growing!

    cheers,
    BD
    BD, just how would I go about giving the roots a quick check?

    Thanks!

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