Trimming your ornamental grasses depends on whether they are Evergreen, Cool Season, or Warm Season varieties.
The OXA Blog
An important distinction in the world of ornamental grasses is whether they are warm season, cool season, or evergreen.
The following is an excerpt from the Blue Stem website. This site was put together by Jim Brockmeyer and Muriel Neale as part of a nursery business they were running in Christina Lake, BC. Both have now retired, but their excellent website lives on with funding for...