Container gardening continues to grow in popularity. Not only is it a great solution for gardeners with limited space, but it's also a great way to enhance outdoor decks and patios—and it can even reduce the amount of time you spend weeding! Popular flower bulbs and perennials for container gardening include caladium, calla lilies, begonias, gladiolus, cannas and dahlias. Often dwarf or compact varieties are top choices for patio pots. When buying plants for containers for sale online, factors to consider include the plant's hardiness zone, sunlight requirements (full sun, partial shade, full shade), soil requirements, mature height and spread, flower or foliage color, and bloom time.