On a recent visit from our pest company, they mentioned that we really need a plant free border around our house. Plants that touch the side of your house allow bugs to get past the pest spray. We removed almost all of our plants and cut away the grass, creating a 2ft wide border around the house. Then we put weed cloth down, installed plastic edging, and added a good layer of bark. Now when the pest guy comes, he can easily spray along the foundation.