An economical and fun way to grow a variety of plants is to buy perennial plant collections. Unlike annual plants, perennial plants come back year after year, so gardeners spend less time planting when growing perennials. Our perennial plant collections feature popular perennial plants, including ornamental grasses. Before buying perennial plant collections for sale online, make sure the collection is suitable to your grow zone. Other factors to consider include the plants' light requirements (full sun, partial shade or full shade), soil requirements, mature heights and spread, bloom time (if applicable), number of plants in the collection, and the flower colors in the perennial plant collection (if applicable).