[header] How to prune roses on a trellis [title] Figure out whether your roses are once blooming or repeat blooming. [step] Roses come in two different varieties-roses that bloom once a year, and those which have a continuous showing throughout the summer months. The variety you have will make a difference to your pruning methods. 
[substeps] Before you go about pruning your rose, it's helpful to know which kind you have. If you're not sure, know that roses with flexible canes and blooms from older growth are typically once blooming.