Jean, UI?
I always have some Orchids which are of the non-blooming variety
, or get easily black rot, or especially susceptible to whatever insect invasion, but I think that is just part of growing Orchids? On the other hand - most are charmers, grow when they are supposed to and some actually never seem to see a bug ( like Ornithophora radicans, both my Ceratostylis and a few more.) So I would say, if the single non-thriving Orchid gets me down, I simply need more Orchids!!