Propagating Big Bluestem

Big bluestem can be propagated through division. As a general rule, wait until the grass is mature and established before attempting to divide. 

  1. In the early spring, as the grass is coming out of dormancy, dig out the roots. Depending on how mature the grass is, the cluster of rhizomes can be very difficult to separate and you may need to use a saw or sharp spade to divide them. 
  2. Cut the clump into sections using a shovel, saw, or knife. 
  3. Replant the sections at the same depth as the original plant. Keep any newly transplanted grasses consistently moist until they have re-established.

How to Grow Big Bluestem From Seed

Big bluestem readily produces seeds every year, which can be harvested and planted the following spring. Alternatively, big bluestem seeds can be bought from most garden centers and specialty nurseries. 

  1. For improved germination, stratify the seeds for one month before sowing to help break the dormancy cycle.
  2. Seeds can be started indoors or sown directly in the garden in late winter or early spring. Sow the seeds at 1/4- to 1/2-inch deep. 
  3. Keep the seeds consistently moist until they sprout. Be patient, as big bluestem seeds can take up to four weeks to germinate.