When do I prune my lilac? How do you prune a clematis? Can I cut back my smokebush and still have some flowers? Pruning ornamental shrubs and vines can be a bit confusing because it sometimes feels like they each have their own "rules". Learn about the reasons, tools, terms, techniques, timing, and strategies used to prune shrubs and vines to get healthy plants with beautiful shapes, colors, and blooms in your own landscape.