Think Pink

Muhly grass is in its prime this time of year, and all our regular visitors are asking about it. This native grass is unforgettable once you see it in bloom, and we are lucky to have multiple types growing on our grounds. Read on to find out which species is right for you!

Muhlenbergia capillaris – Muhly grass, Hair

Planted in the northwest corner of the Arboretum, our plot of muhly grass is in its third year. When first planted they are pretty thin and unimpressive, but once mature these grasses really put on a show, especially if planted in large groups. Vibrant pink seed heads appear in late summer and persist in a thick cloud of color all through fall. Extremely drought tolerant, they hardly need watering once established. They require excellent drainage, best planted in gritty soils, or on a slope.

M. capillaris is native to the southeastern US. Map by USDA plants database.

Muhlenbergia reverchonii – Seep Muhly

Usually smaller in stature, this grass is notably less stiff. While M. capillaris grows straight up, the graceful blades of seep muhly are arching and curled. It isn’t as deep in color, but still has a nice pink hue that is slightly more airy and light. Better for folks who prefer more neutral tones. This species has much more movement in the wind, and is softer to the touch. Something to think about when installing grasses around play areas or walkways!

M. reverchonii has a more limited range, found in the central regions of Oklahoma and Texas.

Muhly Grass cultivars

‘White Cloud’ muhly grass, photo courtesy of Hoffman Nursery

There have been some great options on the market for Muhly grass cultivars in recent years, including a variety of M. capillaris called ‘White Cloud’. It has all the allure of those wispy seed heads but in an ethereal white, a perfect pop for darker backdrops like brick or evergreens. At 4 ft tall it grows a bit taller than the pink types and can be used as a fluffy, neutral tone backdrop in the garden. Muhlenbergia ‘Undaunted’ is a well-loved cultivar of M. reverchonii. It’s weeping seed heads and open habit make it a great specimen plant for the perennial border.

‘Undaunted’ is noted over the straight species for increased hardiness in norther zones and having a deeper panicle color at first flush. Photo courtesy Walter’s Gardens

No matter which Muhly grass you choose, as long as you plant in full sun and well draining soil, you will surely be thrilled with its light texture and season-long interest. It is a water-wise plant with no major pest problems, but it does have few flaws: collapses easily in heavy snow, not very hardy in northern zones, and doesn’t always establish well when planted in fall. Keep those things in mind when considering adding this grass to your landscape. Look out for the spring update of the Native Plant Guide on our FloraKansas page to find out what species we will have available at our spring sale.

Plant Profile: Pink Muhly Grass

Fall is the best time of year to admire the beautiful regalia of native grasses. During the spring and summer, these grasses blend into their surroundings. As autumn deepens, the wonderful fall color and attractive seed heads of these grasses are on full display.

One of the most talked about grasses this fall has to be pink muhly grass (Muhlenbergia capillaris). A few years ago on the sidewalk in the northwest corner of the Arboretum, we established a couple groupings of these plants. This year, these swaths are topped with vibrant pink blooms.

Pink muhly with Wichita Mountains goldenrod

Pink muhly grass is not only a beautiful ornamental grass, but it is also low-maintenance. We have not done much to keep these grasses going this growing season. It gives you the best of both worlds, a showy plant that doesn’t require much time and attention.

These plants establish relatively quickly, either planted in the spring or in the fall. If you are planting in the fall, plan ahead by getting them in the ground at least a month before the expected initial frost. They are a warm season grass that needs soil at least 60 degrees to continue rooting.

In the spring and summer, the rounded, slender, long shoots of grass are dark green in color. As fall approaches, the plant produces soft, fuzzy flowers in pink or pinkish-red hues, with an appearance resembling cotton candy. As winter grows near, the flowers lose their color, but the dried plumes are still attractive.

Muhlenbergia capillaris grows well in sandy or rocky woods and clearings with good drainage. It is native to Kansas and states south and east. We grow the straight species, but the cultivar ‘Regal Mist’ is another popular variety. Other beautiful cultivars include ‘Pink Flamingo’ and ‘White Cloud’. Planting in large drifts is breathtaking.

While not as well-known as some of the other native grasses, it should be used more in landscapes because of its tolerance to poor soil and dry conditions. It needs good drainage especially during the winter, but is quite adaptable once fully established. As the clumps develop excessive thatch after three or four years, division may be helpful. Perfect for slopes; great in a container; beautiful when tucked into cut-flower arrangements.

Sunlight on pink muhly grass with side oats grama in the foreground.

For next spring, put this grass on your bucket list. You will not be disappointed. The soft watercolor effect will stop you in your tracks.