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  #1  
Old 08-05-2009, 11:24 AM
Ingrid76 Ingrid76 is offline
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Is it disease or sunburn? Female
Default Is it disease or sunburn?

I recently returned from an out of town trip and found my dend (Dendrobium Blue Violetta x Red Maroon #693) orchid with yellowing leaves. My first reaction was sunburn, now I’m thinking it might be something else. It looks like its spreading. Any suggestions?
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  #2  
Old 08-05-2009, 01:10 PM
King_of_orchid_growing:)'s Avatar
King_of_orchid_growing:) King_of_orchid_growing:) is offline
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First signs of root damage?

I know that my Pleuros did the same thing, (yellowing from the tip of the leaves) , when that happened.

When Disas get root damage, the same thing happens. The leaf tips are always the first to die.

If so, it might either be:

a. overpotted
b. over watered
c. over fertilized
d. roots are not getting enough air (must improve drainage in potting media)

Other than that, I can't think of a reason why your leaves would yellow from the tips like that. Sunburn is patchy.

Last edited by King_of_orchid_growing:); 08-05-2009 at 01:13 PM..
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  #3  
Old 08-06-2009, 03:21 AM
Chantelle Chantelle is offline
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hey King,

This may seem silly but what does it mean if its overpotted?
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  #4  
Old 08-06-2009, 10:35 AM
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Overpotted = in too large of a pot for the root system.
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  #5  
Old 08-06-2009, 01:29 PM
Jbyron Jbyron is offline
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That whole "over pot" idea always bothered me. It seems to me that the issue with the pot being too big is that the it does not dry out evenly and the interior portion stays wet while the outside and surface, if its a clay pot, dries.

Of course, in the wild orchids have no pots at all so roots dry as they do with a mounted orchid. The problem with mounted orchids is the daily need for watering, so we resorted to pots. The idea of any kind of pot is probably our biggest cause of dead orchids.

So it seems the "over pot" issue is really just over watering again.
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