Posted: 01/11/2014 at 19:18
the many Orchids you see at the supermarket are Phaleanopsis
They like growing on bark of trees in the wild in very humid conditions
The roots need light and they to get the best flowering you should let them become very rootbound.
A tray of pebbles underneath that is kept moist helps too
If you see any roots protruding from the top of the pot, leave these alone, they are feeding the plant