3. Set Up BarriersIt would be nice if dogs realized which plants are delicate and which areas are off limits. But that's not going to happen. Instead, you’ll need to create physical reminders that will make it unpleasant, but not dangerous, for dogs to reach certain spots. You can do this with hardscaping, such as walls, fences or even pieces of wood, but for a softer look, think about using plants, such as rosebushes, tall ornamental grasses, hedges or thick shrubs. Just be sure they aren't toxic or won't physically harm your dog.