Want to grow perennials that have a long blooming period in your garden? Long-lasting perennials add color, height, and texture to the landscape. And equally important, many perennials provide important food sources for beneficial insects and pollinators, such as bees, butterflies, and birds. Perennials can take some time to get established in the garden and the first year, they're typically focused on growing roots. They grow faster in the second and third year and you can enjoy them each year.