I have several Phalaenopsis plants that were in bloom last year when I purchased them. At the end of the season when the blooms were gone I left the stems not cutting or trimming them at all. I was under the impression that the new growth would be on the old stems the next season. But now all the new growth is on all new stems that grew. I thought all they all grew on the same stem season after season, is this not correct ? What do I do with the old stems, leave them or cut them off ? And some of my stems are 42" inch tall and still growing taller. Do they get taller and taller with each passing season ? Also can these types of orchids be grown in hanging wooden pots ? Thanks for your time !