If your prize winning perennials serve a dual purpose as an all-you-can-eat salad bar, you may have developed a certain amount of disgust for the neighborhood felines. Cat's may choose to invade your flowers for many reasons; everything from crisp greens to munch on to a convenient place to relieve themselves. Since it just isn't feasible to stand guard in your flower bed all night and day, a little ingenuity is in order to protect your flower bed from cats.
Make your flower bed uncomfortable for little paws. Sprinkle crushed egg shells or decorative rocks to create a rough terrain that kitties won't care to walk across, let alone dig through.
Create a smell that cats don't like. Cats have an incredible sense of smell and a lot of things don't smell too good to cats, such as coffee grounds, red pepper flakes, and citrus peels. Sprinkle one or all of these things liberally around your flower bed so cats won't even be tempted to go in. Mothballs are another unpleasant aroma that cats don't like. Line the flower bed with mothballs or place them around the plants.
Install motion activated sprinklers around your garden. Contech makes a sprinkler specifically geared towards keeping cats out of your garden called the Scarecrow.
Move anything that may be tempting for kitties such as bird feeders and bird baths that attract tempting prey for kitties.
Set a litter box outside for kitties to use. Create an area that is more appealing than the flower bed and they may be more inclined to go there instead. Sometimes a pile of sod is all it takes.