No orchid should be pruned.
If the plant is overgrown, divide them.
If the flower spikes are dead, cut them off (you'll find out that for many orchids, even when they're finished blooming a lot of activity can still happen if the spikes are still green, although some species have spikes that appear dead but aren't and can still rebloom).
If the roots are badly overgrown, pot up, (don't trim the living growing roots back down because they're growing out of the pot). I know someone who trimmed their orchid roots down every time they became overgrown, this prevents the plant from establishing itself. Trimming roots down should only be done if you're removing dead roots. Removing living roots on purpose to make the plant look more attractive is not a common practice amongst those who've been in the hobby a very long time.
Too many leaves to your liking...,sorry, can't cut them. There could be a lot of negative consequences if someone chooses to trim the leaves back.
Orchids have a different grooming regimen that is simpler to understand and execute. I know nothing about how to properly prune a rose bush or an apple tree, but I know how to make an orchid look pretty when I choose to.
Last edited by King_of_orchid_growing:); 05-25-2009 at 10:39 PM..