Have you every wondered what the best, easy to grow flowers are for your landscape? Catherine reviews her top five perennial flowers, which have beautiful blooms and come back every year. She introduces catmint, May Night blue salvia, Moonshine yarrow, red valerian and daylilies. These reliable flowers will add lots of beauty to your garden for years to come. These top five plants are great for beginning gardeners, those who have had difficulty growing other plants and people looking for low maintenance color for their yard.