Posted: 02/03/2014 at 16:12
Difficult to explain in words, but you need to try and train some of the shoots horizontally, then the shoots that come of those horizontal branches should be pruned to 2 or 3 buds; these are the shoots that will flower.
If you leave the branches semi vertical you will only get flowers at the tips.
Once you have a framework the pruning becomes easier in subsequent years.
I hope that makes sense. In practice it is easier than my attempts to explain it.