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Paph Brown Tips

This is a discussion on Paph Brown Tips within the General Orchid Culture forums, part of the Orchid Culture category; No, I'm not making an inquiry about men's dress shoes... I have noticed some, not ...

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  1. #1
    Bikerdoc5968 is offline Senior Member
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    Default Paph Brown Tips

    No, I'm not making an inquiry about men's dress shoes... I have noticed some, not all, of my paphs get this brown discoloration which begins on the tips of the leaves and progresses toward the crown. I have applied bleach, sprayed with RD-20 (Physan), applied fungicides but to no avail. If I wash the affected area with bleach and then remove it well down onto the green portion of the leave, it only begins again. The brown area is dry, odorless and brittle. So my question is: can this be a sign of over fertilization as can be seen with cymbidiums. I do a "wash-out" once a month and I try very hard not to wet the leaves. I have fans moving air. While I'm only moderately concerned because the plants appear otherwise healthy, it is still problematic to me....




  2. #2
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    clintdawley is offline Wrapped in metal..wrapped in ivy...
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    Over-fertillization begins at the tips..so I think you are onto something. How long has it been since said paph has been repotted? It could be that the mix is old and holding onto more salts than it did when the mix was newer. I think it's time for a distilled water rinse down and a repot.

  3. #3
    Brutal_Dreamer's Avatar
    Brutal_Dreamer is online now Dreaming with my eyes open...
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    Yes, this is usually caused by salts build-up. The only other issue could be related to standing water on a leaf. If the leaf is lying where it can hold water (usually toward the end of the leaf where it is against another pot or on the bench) it can sometimes keep that part of the leaf wet too long and cause it to get a mold or fungal infection. Most likely though, it is a fertilizer salts buildup.

    Rinse the orchid bark for at least 60 seconds or more with a fairly strong (not a blast) of water current. This will loosen any salts that are on the outside of the potting mix. The salts that have been absorbed will be more difficult to clean out. In this case, as Clint suggests, repot in a fresh mix that has been thoroughly washed and pre-soaked.

    Cheers,
    BD

  4. #4
    Bikerdoc5968 is offline Senior Member
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    Thanks...sounds like we have a plan!

  5. #5
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    bench72 is offline Moderator
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    Hi Howard, I'm gonna agree with Clint and Bruce on this one... too much salt build up from fertilisers... so you may want to reduce the fertilising or increase the 'wash-out'.

    Also, when you cut the brown tips off, try covering the cut with cinnamon and keeping that cut fairly dry for a couple of days.

    good luck and hope the browning stops.

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