Growing unusual perennials that you can't find at just any retail stores is a great way to give your garden a unique look. These less common perennials are also likely to stop garden visitors in their tracks and ask, "What is that?" Dutch Gardens carries a wide selection of perennial plants for sale, including some lesser known types. When considering what perennials to buy for your garden, first make sure they are suitable for your grow zone. Other factors to consider are sunlight requirements (full sun, partial shade, full shade), soil requirements, water needs, mature height and spread, bloom time and flower color.