O is for Orchids which come in a mind-boggling array of colors. If you ever visit Pennsylvania, try to come to Longwood Gardens in the Brandywine Valley or Phipps Conservatory in Pittsburgh. Call ahead for orchid show times.
A novice can start growing Butterfly Orchid by selecting the suitable soil for it. Proper and constant humidity is also essential for these Orchids. Placing the Orchid pot on a tray full of pebbles and pouring water in that tray would be enough to provide the adequate humidity to the plant.