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Divide Perennials in the Fall

Divide Perennials in the Fall

After a few years, many perennial plants have grown so large that they need to be divided in order to be revived. Overcrowding causes them to bear fewer flowers and, sometimes, to die in the center. Fall is a good time to divide perennials that bloom in spring and summer and are now done blooming for the year. This is a great way also to expand your perennial beds or share some of your perennial favorites with friends and neighbors.

Vibrant blue Stokes' aster. Photo credit: UF/IFAS.

Vibrant blue Stokes’ aster. Photo credit: UF/IFAS.

Some examples of perennials to divide in the fall are:

  • Stokes’ aster, Stokesia laevis
  • Daylily, Hemerocallis spp.
  • Black-eyed Susan, Rudbeckia hirta
  • Yarrow, Achillea millefolium
  • Crocosmia, Crocosmia spp.
  • Flax lily, Dianella tasmanica ‘Variegata’
  • Liriope, Liriope muscari
  • Cast iron plant, Aspidistra elatior

The first step is to dig out the entire clump. If there is enough clearance in the garden bed, start digging about six inches out from the plant and dig straight down beyond the root zone. It’s best to get as much of the roots as possible to lessen the shock of transplanting. If the clump is too heavy to remove, make your divisions right there with a sharp blade, trowel or shovel. Often, you can just pull them apart with your hands.

Before replanting the divisions, consider adding some nutritious compost to those areas of your garden bed to ensure healthy plants. Be sure to replant as soon as feasible to protect the roots from drying out. After replanting, water the transplanted divisions well and mulch appropriately.

To explore further please see:

Gardening with Perennials in Florida

Propagation of Landscape Plants

 

PG

Author: Mary Derrick – mderrick@ufl.edu

Residential Horticulture Extension Agent for Santa Rosa County

Mary Derrick

Permanent link to this article: http://okaloosa.ifas.ufl.edu/newsletters/2015/09/09/divide-perennials-in-the-fall/