@Alee Many perennials (plants that come up every year) need cutting back to just above ground level. They do look dead as @Gramaisc says but they will come up. Cut off any dead foliage even if that means cutting it right back. Without knowing the names of the plants it's difficult to tell you what to do. A handy tip for next time is to plant the label next to the plant so that you can remember what you have planted. Are you able to take a photo of the plants so that we can see what it looks like now?