Monkey grass, or liriope muscari, is an evergreen, ornamental grass that can survive in a variety of climates, but can be severely damaged and killed by hard frosts. Permanently killing monkey grass can be done by two main means: applying herbicide containing glyphosate or manually digging up and removing the grass from the ground. However, the best approach for killing monkey grass is to prevent it from taking root in the first place by applying mulch in the areas where it grows.
