My question is about growing media. What do you use for your Peristeria? It is a terrestrial orchid and requires special mix. I apologize if I'm preaching to the choir.
I have two Peristerias, the Dove orchid (Peristeria elata) and Peristeria pendula. None of them has bloomed yet. However, both guys are doing OK (I assume). Sometimes some of their leaves turn yellow and dry but I think it is quite common for this genera. I might be wrong but it is my belief.
These two like to loose one or two p-bulbs sometimes. They easily get rotten so you better keep your eye on growing media. Peristeria elata does not like too wet media.
I grow my Peristeria elata in terrestrial orchid mix and Peristeria pendula in sphagnum moss.