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This is a discussion on Orchid Identification within the New Growers: Ask the Senior Members forums, part of the New Growers category; What is your fertilizer routine? Old leaves do turn light brown and dry out. black ...
What is your fertilizer routine? Old leaves do turn light brown and dry out. black on the leaves is more likely a burn from sun? Although, if water from misting or watering them sits on the leaves, rot can start. Do you have a fan blowing directly over the cymbidium's leaves?
could it be fertilizer? I give a weak mix of it every watering which is once a day. i keep the plant against the south facing wall with a east facing window too its left 10 ft away.