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Phal Equestris Alba have "yellowish" leaves

This is a discussion on Phal Equestris Alba have "yellowish" leaves within the New Growers: Ask the Senior Members forums, part of the New Growers category; Originally Posted by OrchidAddict Hmmm...very interesting. I noticed that the yellowing one in your photos ...

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  1. #11
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    Quote Originally Posted by OrchidAddict View Post
    Hmmm...very interesting. I noticed that the yellowing one in your photos is an "alba" variety. Do you happen to know if it's just the "alba" variations that are missing the red pigment? It would sort of make sense, as in the human and animal world there is a condition called albinism, which is characterized by the lack of any color pigment in the body. These people's skin, hair, etc, appears white. (Many people call them "albinos," but this is an offensive term to them...I'm just using it here to make sure you know what condition I'm referring to.)

    Anyway, "Alba" means "white," so it would make sense that the "alba" varieties of plants would be missing pigment, just like people and animals with "albinism" are missing pigment. It would be a pretty neat discovery if we learned that we only need to worry about bleaching on "alba" varieties of orchids, and we can use the "red leaves are bad" rule for everything else. Just curious.

    Thoughts? Anyone?
    Yes in this case it is the alba version that miss pigments, the flower is pure white and has no fragrance.

    There are many different kinds of Anthocyanins and it is not only alba versions that does miss the visible "red spots" on leafs in high light. For example my Cattleya forbesii does not produce "red spots" but are bleached, while my Cattleya guttata clearly shows "red spots" at high light conditions.

    /M

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    Oh my I learned a lot from you guys. And I didn't mention that my equestris ARE var. alba! If I understand you both right then is it possible that my plants leaves are kind of got bleached? However I've already moved them to place with most shade on my windowsill, and I guess as long as I keep monitoring their overall condition I should not worry too much, right?

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    :-)
    Your leafs in the picture was not near "bleached" as we talk sun damaged.
    I have only seen that once and that was when I put an orchid in full spring sun after a dark Swedish winter. It turned white!

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    Quote Originally Posted by Magnus A View Post
    :-)
    Your leafs in the picture was not near "bleached" as we talk sun damaged.
    I agree. Your leaves are all a nice uniform light green color that appears to be just the natural color for your plant. When I see my garden or houseplants bleaching, it's often uneven...certain leaves will show more damage than others. Your plant is the same color all over. I think it's fine. Of course, if you're really paranoid about it, you could back it away from the window a bit, but seeing as it's preparing to bloom, I wouldn't back off the light just yet. You might stall the budding/blooming process and not get as good a show. They say the #1 factor in blooming an orchid is that the orchid gets enough light.

    Once all of your flowers have opened, though, there's no harm in moving it back from the window. Some people have told me that blooms last longer if the plant is kept in a cooler, lower-light environment when it's in bloom. (This is why, once my blue dendrobium's buds opened, I moved it out of its super-sunny window and into a nice display area where it's cooler so the blooms will last as long as possible. Once all the blooms fall off and the plant gets a little "rest," I'll put it back in the higher light and increase the fertilizer to "perk it up" again.)

    But really, I think your plant is just fine in this case. And I would trust Magnus's judgment in this matter too.

    Of course, I know you'll still worry and fret, because that's what we orchid lovers do! LOL I move my dendrobiums and vandaceous orchids across the house to a western window every afternoon, and then back to their eastern window every night so they can catch the sun the next morning! My husband thinks I'm crazy! So I know all about obsessing over the right amount of light! Hehee! You'll have to keep us posted on how everything goes!


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    ((Magnus : okay ! As an Indonesian living in Germany, after 10 years I haven't really adapted quite well with the long, dark winter days here... winter depression is my new bestfriend. I believe in Sweden there are even more shorter winter days with sunlight? So it's not an overstatement when I say I feel your orchids, they must struggle as well to survive winter. But thankfully they are in good (your) hands

    ((Jen : LOL that's kinda cute of you !! But yea I do feel like an overprotecting mom to my babies, they actually help training me a lot about letting go and learn to worry less ... it's just so hard sometimes. I think one of them, Petra (of course I give my orchids names!! ) will open up her first bud soon. Pics definitely coming

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    Looking great. Phal Equestris is one orchid that will keiki very often too. Nice growing.

    cheers,
    BD

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    Thank you Bruce yes I hope I will get some keikis too later! Never had one so far so I'll be delighted

  8. #18
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    Ummm...you know how I said watch for red? Yeah, you can just go ahead and ignore that. I have two sunburn incidents to report: both YELLOW. One is a one-time-exposure burn, and the second one shows lightening over time.

    The small seedling in the photo below was getting too much sun for several weeks. I didn't realize that the baby dendrobiums needed to be in significantly less light than the grownups, until the evidence appeared. You'll see on the seedling, the middle of leaf is starting to turn yellowish and lighten in color, indicating too much sun. Now, this took weeks to happen, so I didn't notice it right away...but it's obviously sunburn because of how it's uneven. Some areas are more yellowish than others.

    The bigger plant is a phal that I accidentally left on a sunny table one day. It's a one-day overexposure burn. You'll see the tip of the leaf is burnt, and as you get closer to the middle of the plant, the tissue turns normal color again. Both plants will be fine, but I wanted you to see how different sunburn looks from what's going on with your plant. Your plant is a lighter, uniform green all over. Evidence of sunburn would come in lightening in certain places first. Your whole plant just wouldn't suddenly turn a few shades lighter...you'd notice yellowish patches before it got too bad.

    Of course, if I had continued to leave the dendrobium seedlings in the overexposed area, eventually all the leaves would have turned yellow, but I noticed it before it got too bad. And I think you'd notice it if one of your plants was gradually burning, too. I feel really stupid about the phal incident. I was repotting and I moved stuff around and left it on a sunny table too long. Ah well...it will recover. They'll both be fine.

    Evidence of me being an idiot:
    Name:  sunburn.jpg
Views: 655
Size:  266.2 KB

    Ah well...live and learn! If any of my phals turn red the mythical "red" color I hear people talking about, I'll let you know! LOL

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