The Q&A Archives: orchids

Question: I have Oncidium & denrobin orchids. They have black spots on the leaves, although the new ones do not. They have bloomed and seem healthy.

Answer: If only the older, lower leaves have developed spots I think it is just the natural aging process. Eventually they will turn yellow and drop off the plant. As long as the new leaves look fine, don't worry about the spots on the older leaves.

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