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Orchids with Mineral deficiency?

This is a discussion on Orchids with Mineral deficiency? within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; Here are a few leaf photos. First is a Laelia tenebrosa, second is Grammatophyllum scriptum. ...

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  1. #1
    cwcervantes's Avatar
    cwcervantes is offline Senior Member
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    Default Orchids with Mineral deficiency?

    Here are a few leaf photos. First is a Laelia tenebrosa, second is Grammatophyllum scriptum. Is this a mineral deficiency? I watered today and added some Epsom salts...




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    dougroc is offline Senior Member
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    Do you see this on the new leaves as well as the old leaves? Also, does anything look strange about the
    underside of the leaves?

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    Yes, these are new leaves. Not as much on the older leaves. Nothing on the underside of the leaf. Pest free.

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    dougroc is offline Senior Member
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    Cody,

    I found a link to a site that shows leaves show seem to look quite similar to yours, corroborating your
    suspicion of Mineral Deficiency. It's unfortunately on a commercial site so I'm not allowed to post it.
    (If you google "orchid doctor yellow leaves" you will find it)

    To correct a mineral deficiency you might want to try a fertilizer with lot of different trace elements, like
    DynaGro rather than Epsom Salts which only has magnesium. Also I seem to have good luck with the
    use of an Seaweed extract. These can be found at most hydroponics stores.

    Hope this helps!

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    ksriramkumar is online now Senior Member
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    Grammatophyllum are quite prone to spider mites and false spider mites and symptoms are quite similar. I would check the underside of the leaves with a cotton ball dipped in rubbing alcohol.

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    My Grammatophyllum had those and i tossed the plant out, i usually do that with my plants that display odd colorations just to be on the safe side incase its a virus

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    I do not see that as a mineral deficiency at all; it is an external source - mites, fungus. or virus.

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    Although I can't rule out one of the problems Ray mentioned, to me it looks like magnesium deficiency. To see some examples, Google 'orchid leaves mineral deficiency'. One of the results will be from the St. Augustine Orchid Society. Check the photos of Mg deficiency, compare to your plants, decide for yourself.

    Magnesium can be supplied inexpensively with 1/2 teaspoon Epsom salts per gallon. The Epsom salts from the pharmacy are fine, use the unscented kind.
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    Some time this symptom comes if over fertilized and root damaged...

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    It looks like spider mites to me with the stippling of the leaf, but I can't rule out fungus either due to the yellow broken cells below.
    But usually it also comes with a lot of brown spots and some sunken areas.

    Vitamin Deficiency? After seven years keeping orchids, I would assume that you fertilize your orchids regularly ... so I kinda doubt that it would be your problem. But it wouldn't hurt to try a little Epson salt and see what happens.

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