Looking after an orchid
Can you help please? I have a beautiful phalaneopsis orchid which has been happily flowering on a window sill for four years - it's on it's third lot of flowers. The leaves have begun to die back from the tips, going brown and shriveled, and there are now only two leaves left, which are brown down half their length while the three large stems are supporting over 30 blooms which seem OK.
I re-potted it last spring when it had died back, and until the late autumn it seemed happy.