Posted: 18/03/2014 at 15:26
@the Bird Lady : thare are two ways of dealing with Phalaenopsis spikes. When it has finished blooming, I suggest you to try the following : cut the spike about an inch above the third node (or at least above a node that is still fresh and green). It often (but not all the time) triggers reblooming ; a new spike will grow from the node, giving you some extra flowers.
Some botanical Phalaenopsis, and even some hybrids, are able to rebloom 1 time (or several times) on the same spike. The only way to know what will happen is to left your spike uncut. You'll see if it becomes yellow and woody, or if it stays green ; in that case, don't cut it until it has dried.
As an example (for illustration), I have an hybrid Phalaenopsis called "Magic Touch". After it has finished blooming, the spike dries on 1/3 or half of its length. Then it goes dormant. The next year, a new spike emerges, and the old one awakes and produces some new buds ; then it definitely dries. So each flowering spike has some kind of a "2-year lifecycle".