<p>Well renowned as being quick and easy to grow as well as being bright and cheerful, there is no reason why everyone should not succeed with these plants. However it is essential that annual pruning is carried out, otherwise they can become leggy and stop flowering. The spring flowering shrubs should be pruned when flowering has finished, removing any old and weak stems. The summer flowering shrubs can be pruned more brutally, in early spring cut back all stems to within a few inches off the ground.</p>