| Last questions first. When a plant has stopped blooming it is OK to change the medium. It is best to wait until the orchid is showing new growth, usually about a month after flowering.
Try to keep the orchid in the smallest pot in which it fits. orchids like to be pot bound and do poorly when placed in a pot too large.
Wrinkled leathery leaves can be from many causes. Guessing that you are probably starting with Phalaenopsis (big fat wide leaves growing from a center stem low in the pot) It can be from the leaves getting old or the roots starting to deteriorate. Over or under watering can cause these problems (as well as cold which does not seem the cause from your description).
Does your plant have new healthy leaves growing? If it does, then the old leaves are not as important. If all the leaves are wrinkled then the problem is probably in the roots.
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jerry  |