Let’s “Switch Grass”

On this week of Around the Grounds we learn about Switch Grass, a native plant that can replace invasive ornamental grasses.

Do you have this ornamental grass in your yard? If so, it may be time to switch grass!

Miscanthus sinensis, or Chinese silver grass, is a too-popular ornamental grass so problematic that New York State has regulated it as an invasive species. Switch Grass (Panicum virgatum), on the other hand, is a native ornamental grass that is a perfect substitute. Maybe it’s time to switch?

Ornamental grasses have become increasingly popular as modern tastes have shifted to more naturalistic garden designs. Grasses bring year-round interest, movement, structure, and seasonal changes of palette that enhance every garden. Unfortunately, at least this one non-native grass has created an ecological problem.

Invasive Miscanthus sinensis offered for sale on line
Miscanthus sinensis “zebra grass”

Sold under the names Chinese silver grass, zebra grass, maiden grass, and porcupine grass, Miscanthus also has many cultivars, including “Morning Light,” “Flamingo,” “Ghana,” “Adagio,” and over 100 others. Despite being identified as invasive by New York and other states, it is still being sold, and is still spreading itself everywhere. It is invading natural areas because it has no biological controls on this continent.

Switch Grass is just as attractive as Miscanthus, just as easy to grow, and just as diverse. An original denizen of America’s prairies and meadows, it has deep roots and is both drought tolerant and deer resistant. It is increasingly available in a huge variety of sizes, shapes, and colors. And Switch Grass is the host plant for very cute native butterflies called, “skippers.”

Skipper butterflies lay their eggs on Switch Grass
Photo: Pixabay
Switch Grass is a beautiful native plant 

Switch Grass is gorgeous through all four seasons, and its versatility is on full display at the Greenburgh Nature Center. The cultivar “Heavy Metal” is steel blue in summer and grows up to 5 feet tall. It is equally impressive in winter when it provides texture, movement, and contrast to evergreen shrubs.

Panicum virgatum ‘Heavy Metal’ frames our patio in summer
The golden tones of ‘Heavy Metal’ contrast with Inkberry and Red Twig Dogwood in winter

Another Switch Grass cultivar, ‘Shenandoah,’ is 3 to 4 feet tall and has a graceful vase shape that complements both shrubs and perennials. Because it hosts skipper butterflies, it is a great addition to pollinator gardens. Like all Switch Grasses, it enjoys full sun and tolerates poor soil. No supplemental water, no fertilizer, no worries.

 Panicum virgatum ‘Shenandoah’ in the Pollinator Garden at the Nature Center

When we planted the Gerrie Shapiro Memorial Pollinator Garden at the Nature Center last June, we started with tall Switch Grasses as the center “spine” of the garden. Along with ‘Heavy Metal,’ we planted ‘Northwind,’ a Switch Grass cultivar that stays tall, narrow, and straight all season long. These two native grasses support tall flowers that would otherwise flop over when in full bloom. Switch Grass evolved supporting tall wildflower companions in American meadows and prairies, so it’s perfect for that job.

Tall Switch Grasses define the structure of the new garden
A month later, ‘Northwind’ Switch Grass supports tall flowers

One of our favorite smaller Switch Grasses is ‘Ruby Ribbons.’ At only 3 feet tall, it’s a good choice for smaller gardens. It has multi-colored leaves in shades of red and purple all summer long, and just gets prettier in the fall. Even smaller is ‘Cape Breeze.’ At less than 2 feet, it makes a great edger along the garden path.

Panicum virgatum ‘Ruby Ribbons’
‘Ruby Ribbons’ in October

And if you want to see what Switch Grass looks like in its natural habitat (almost) come visit our Meadow! After spring mowing, Switch Grasses start showing new growth. By late June, they fill out the Meadow terrain. And in the fall, clouds of tiny seeds hover above the Switch Grass stalks, feeding flocks of birds then and all winter long.

 Switch Grass in the Meadow in the fall

So, are you ready to switch grass?