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Black spot on my vanda—crown rot?

This is a discussion on Black spot on my vanda—crown rot? within the New Growers: Ask the Senior Members forums, part of the New Growers category; ...

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  1. #1
    ceh824 is offline Junior Member
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    Default Black spot on my vanda—crown rot?

    Hi everyone,

    I bought this vanda in March, but I didn't start learning about proper orchid care until June or so. I realized a lot of the tiny roots around the basket didn't turn green when I watered it and cut them off when I repotted it. A few of its leaves were also drooping when I bought it because of the way it was arranged between the wire used to hang it. When I repotted it, I made the mistake of cutting off the drooping leaf, thinking it would be better off without it. Instead, two new leaves on the same side were drooping the next day. I also started to notice black spots on the crown, which I've treated with cinnamon. I've attached photos here—apologies that the cinnamon makes it difficult to get a really good look at it.

    Some of the roots also seem to be dying since I repotted it, and there seems to be a good deal of dead stem (crown? not sure of the terminology, but the area that's twist tied into the basket) that I'm not sure what to do about (if anything).

    I'm going to be reaching out to orchid care shops here in NYC, but does anyone here have thoughts on what's going on or advice for what I should do next? Thanks!

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  2. #2
    ksriramkumar is online now Senior Member
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    I observe cinnamon on the roots. Did you apply cinnamon powder on the roots?. cinnamon is a desiccant and would dry and ruin the roots in no time. I see a good amount of salt deposits in the leaf. what are your growing conditions and what water do you use to water your Vanda?

  3. #3
    ceh824 is offline Junior Member
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    Yes, I mentioned in my first post that I had applied cinnamon to the black areas. I read online that it's a natural fungicide and so I applied it after I cut off a drooping leaf during the repotting process and again after I noticed black spots in the area.

    The orchid hangs in a south facing window. I'm not sure it's getting enough direct sunlight. I need to hang a new hook in front of the sliding glass door. Currently it's off to the side in partial sun, partial shade. I water it with NYC tap water, which I think must be the cause of the white spots on the leaves since the orchid had those when I bought it. I read online that the drooping leaves can be a sign of too little water so I've been submerging it in water in a medium sized trash can (bought to be a place to water the orchid and for no other purpose) for anywhere between 8 and 15 minutes daily.

  4. #4
    ceh824 is offline Junior Member
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    Here is what it looks like with the cinnamon removed. That is crown rot, right? Name:  IMG_6628.jpg
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  5. #5
    78Terp's Avatar
    78Terp is online now An Avant Gardner
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    At the intersection of the root? If yes, then no. It doesn't look like crown rot to me.

  6. #6
    ksriramkumar is online now Senior Member
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    Crown is the growing tip (leaves) of the Vanda. Your Vanda, roots look bit dehydrated but if you water well and may be add a rooting stimulant like kelp it should help recover and should put out new root tips

  7. #7
    ceh824 is offline Junior Member
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    Thanks for the input! I've ordered a kelp root stimulant after someone recommended it on another chain and I'll start with that as soon as it arrives.

    In the meantime, should I just ignore the black spot? Could it be something more nefarious like black rot or is it just a symptom of dehydration?

  8. #8
    ksriramkumar is online now Senior Member
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    Black spot, I would leave it as is if it is not increasing in size.

  9. #9
    ceh824 is offline Junior Member
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    Hi everyone. I've received the kelp root stimulator and I'm wondering how often I should spray it on the vanda. I also have fertilizer and probiotics. Should I use those as well or hold off until I see some root growth? Thank you!

  10. #10
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    I don't see any black spots on your photos. Your Vanda looks okay. Growing it bare root in a basket is difficult because Vanda require a lot of moisture. The big roots are like sponges that absorb moisture. So if you can water daily or mist the roots daily so that the roots turn green--that would be appreciated. Products such as Kelp extract (I use KelpMax--I refrigerate it), plant probiotics, etc I use about once a month. I fertilize my Vanda every other watering. I grow mine bareroot, on a wire. To help keep humidity higher around the roots, I drape Spanish Moss around the roots, this helps two ways: visually clues that it needs water when the "moss" turns white, like Vanda roots, it becomes a vivid green when hydrated. And second, the Spanish moss adds visual appeal.

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