not flowering

Hi, I have a couple of question about the star jasmine, hoping you can help:

1) The star jasmine I bought last year is in a large pot and is growing really well, however not flowering. How often should I feed it and what with to get it to flower? (it is about 3m high and has spread well). It flowered a lot last year. Also how often should I water it?

2) I have just bought another one of these and put it in a pot. It is a much smaller plant at the moment - about 1ft tall. What should I feed it, how often and how often should I water it this one?.

3) I was advised star jasmines are the only evergreen climber which will do well in pots and still look nice year on year. Do you agree with this or can you suggest other evergeen climbers which do well in pots year on year?

Thanks in advance!
Chrissie