Shape and structure are important when it comes to pruning roses. You want to prune it so the plant will grow well and look great in bloom. Some people are too afraid to heavily prune their roses, but you can safely cut roses back by two thirds of their pre-pruned size. Before you start pruning, stand back from the rose bush and look for dead heads, branches that are crossing over one another, branches that congest the centre of the plant and dead wood. All of these things need taking care of during the pruning process.