Thursday, December 23, 2010

Standards for Landscaping? or Grasses that should not be planted?

QUESTION:
I was asked recently about developing a 'code of standards for Minneapolis housing inspectors re. boulevards and private landscaped spaces', what grasses would I recommend NOT be planted or that should be REMOVED from landscapes. 

Phalaris arundinaceae, reed canarygrass came to mind immediately, a grass that is so common and a huge monoculture in so many wetlands in Minnesota. BUT I have the ornamental form of Phalaris arundinacea 'Feesey's Form', aka 'Strawberries and Cream' planted in my yard on a dry difficult site. I continue to remove reed canarygrass from my property and grass collection. 

Here was my complete ANSWER
This is fun to think about, however it is hard to come up with grasses that I would not plant or ask people to remove. reed canarygrass (Phalaris arundinacea) has caused a lot of concern and work to remove it from wetland areas. I remove it from my yard, but I do have some ribbongrass (Phalaris arundinacea 'Feesey's Form' that can be invasive, but in the dry tough site where it is, it is not a problem.
  Miscanthus can be a big problem, especially if not watched for reseeding, our Minnesota growing season has really helped us avoid this problem. I certainly would encourage diversity and planting a wild range of plants, including native species, esp if buckthorn is removed. garlic mustard and giant hogweed are certainly to be avoided and I remove these from my yard regularly.
  I think a listing of the worst invaders and a conscious effort to plant a wide diversity of native plants is the way to go.  As much as I dislike the monoculture of a lawn, it does make an easy cover that does not erode and looks nice to most people. Using fine fescues and letting them grow and mow only a few times a year, or just mow the edge can be a low maintenance way to go and listing references for people to use, lists and photos of native plants is very helpful.

No comments: