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How do you deal with small black spots on the underside of orchid leaves?
In orchid growing, if you want to raise robust seedlings free of disease spots, the first thing you must face is infectious diseases, which fall into four major categories: fungal, bacterial, viral and nematode. ...
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Orchid leaves develop pinhead-sized spots on the underside; prevent sand spot disease in the hot season
Cymbidium sinense 'Chinese Prince'
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What should you do about small black spots on the underside of orchid leaves?
There are small black spots on the back of orchid leaves, what should you do??