Here at Plant by Design we consider October to be Ornamental Grass month.
Grasses are great year round, but October is by far the best when it comes to seasonal interest. In particular, the seed heads and fall color are what make grasses such an asset to design. Each October we will discuss a different ornamental grass that we feel no landscape should be without.
For this installment we will give the underused River Oats (Chasmanthium latifolium) their rightful place in the spotlight.
River Oats, also called Northern Sea Oats, are a clump forming ornamental grass that only gets around 3′ tall. Its structure is more similar to bamboo or other Japanese grasses (we like to encourage our clients who want Japanese gardens to include native plants that have a similar look. We will do a blog post on which of our native plants fit seamlessly into Japanese gardens soon).
If you need an ornamental grass for dry shade, this is the one you’ve been looking for. No other grass performs as well in these conditions. They will spread if the seed heads are not removed in early fall, but this is a great trait if you have a hill side or bank that you want to cover. Megan and I both have them in our landscapes and we are in agreement that they are easily manageable if spreading is not what you desire.
Chasmanthium latifolium is simply a gorgeous grass. Most of the year it is a vibrant green before turning shades of yellow in early fall. The seed heads persist for much of the summer and almost appear to glow in the early morning sun. By October they turn brown and offer an excellent accent for fall decorations or floral arrangements.
They are also great for nature! A few species of Skipper Butterflies use them as a host plant and the seeds are grazed by small mammals and birds. The foliage is also used in the creation of habitat. As for deer… they leave it alone!
River Oats are not the easiest grass to find at most garden centers so if you are having trouble locating some let us know and we will be glad to help you out.
Thanks for reading!
Plant by Design LLC