Drought tolerant .. Low maintenance .. Muhly grass. Muhlbergia is a variety of ornamental grass with spectacular showgirl flair. The common name is Muhly grass and it is extremely hardy and easy to grow. Muhly grass grows in clumps that are 3 to 4 feet tall. It grows in any type of soil, so long as it drains well. Muhlbergia does not like wet feet.