Posted: 30/05/2012 at 21:37
Cupani is a small sweet pea, only about 4-5', so you should have no trouble with that. For the others, I don't see why you took out the side shoots? That will give you bigger flowers, but fewer of them. If you want more flowers, keep the multiple stems.
Height - they grow naturally to about 8'. If you take out the growing tip, that will slow them down, but they will still keep growing. Why not train them horizontally?