Dividing and transplanting popular perennials like astilbe is a simple way to turn a single plant into multiple smaller plants.

Oosterwyk says that perfect perennials for dividing include hostas, daisies, helenium, daylilies, astilbe and other spring/early summer bloomers. “A good rule of thumb is to transplant opposite the ...

Every three to five years, divide astilbe, campanula, coneflower, daylily, lily and iris. Every five to 10 years, divide hosta. After removing dead tops, dig the entire clump.

Climbing root systems such as astilbe, hosta and daylily are also included. It is also important to note what resists dividing.