The process of splitting a mature plant’s root system into two or more separate plants, each with a portion of roots and stems or buds. Division works with plants that naturally form clumps or spreading root systems. It is used to propagate perennials, to spread a plant to new locations, or to rejuvenate an overcrowded clump whose growth has declined. Common plants propagated by division include chives, rhubarb, and strawberries.