Actually, what you are seeing are not fruit flies at all, but rather fungus gnats…pesky little critters that are more annoying to us than they are to our Orchids. Rest assured that fungus gnats are a very common annoyance that even the most reputable greenhouses deal with on occasion.
There are two reasons why fungus gnats are hanging around your Orchid: first, your potting media may be so broken down, it has become a haven for fungus gnats to lay their eggs, so their larvae can feed off the decaying media; or second, your Orchid may be dealing with some rotted roots which are feeding the fungus gnat larvae.
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