Also, a lot of Phal hybrids are actually Doritaenopsis hybrids. That is: they are a cross between a Phalaenopsis and a Doritis (which to the layman, just looks like a small phalaenopsis). However, Doritis are sequential bloomers; meaning that while they may have a bunch of flowers open at any one time, the older flowers drop off while new flowers are produced at the stem tip. Sometimes this trait is carried over to the hybrid progeny....especially many of the hot purple, smaller flowered Doritaenopsis (DTPS).
I am having this particulan problem with my orchids. I have 2 (one of which is done blooming). I believe they are both Phal's but do not know if they are hybrids or not. But I am having several blooms die on my stem, while at the end there is new growth and small bulbs forming. I was wondering if this is normal for other orchids or is it a sign that I am watering or sunlighting wrong. I have very healthy roots and leaves, so I feel like I'm doing ok with it but im not sure abour the dropping flowers. also, if this is normal shoild i move up the stick i have it on to be closer to the new blooms or let is droop sideways a way before the new blooms?