Thank you all!
I love everything about them, color, shape, some of them nicely scented, growth habit...and they don't spread out but just grow upward so I can have many of them on my window.
tucker85- I wish I lived in Florida! Most of mine grow one cane a time, I can see how they will grow like crazy in the right environment. my dream is to have a garden loaded with dendrobiums and go flower crazy from all the canes they grow all the time! hahaha
By the way, you can try some not so tall ones. Some of mine grow 3-4 ft but some are shorter than 1ft and still flower nicely. If you'd like, I will send you some low growing ones when I have enough keikis to give away.
You can always divide them or cut them into pieces and start new with keikis if you don't like how big they get.