How often can I divide perennials?


How often can I divide perennials?


The frequency of division depends on the species of plant.  Most fast growing perennials, like the following, can be divided every 2 to 4 years.

  • aster
  • coreopsis
  • daylily
  • hosta
  • garden phlox

Perennials that spread rather slowly, such as Siberian iris and peony, can be divided every 4 to 6 years.  Some perennials, like false blue indigo and gas plant, don’t like to be divided and should be left undisturbed in the garden.  

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