Black Spot that is turning leaf yellow
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Old 04-12-2013, 03:08 PM
ktwk007 ktwk007 is offline
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Join Date: Apr 2013
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Black Spot that is turning leaf yellow
Default Black Spot that is turning leaf yellow

I have a phalaenopsis that I repotted approximately 2-3 months ago. In the past week it has developed a black spot that is rapidly turning the leaf yellow, but just the one leaf. I don't think it's sunburn since it has been cloudy lately and it doesn't get direct sunlight. What should I do?
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Old 04-12-2013, 03:53 PM
Brooke Brooke is offline
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Join Date: Nov 2006
Posts: 1,477

The spot is a small bacterial or fungal infection and the yellow discoloration is the plant trying to fight off the infection.

If it were mine I would watch to see if it spread more or if it started spreading fast. If it was a fast moving infection then I would remove the entire area, not the whole leaf.

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black, cloudy, leaf, spot, yellow

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