Posted: 15/08/2015 at 10:01
Good idea to let them get established with good roots.
For flower power, you need to be training their stems as horizontally as possible rather than letting them grow vertically. See if you can gently bend the stems down diagonally and then later on horizontally. This helps the flow of sap and encourages new short stems with flowering spurs.
Climbing roses should really be pruned in winter to remove old, dead or damaged wood and any stems growing out from their supports and that can't be trained in. The RHS offers this advice - https://www.rhs.org.uk/Advice/Profile?PID=189