Nimblewill (Muhlenbergia schreberi) is a warm season perennial grass that is widespread across the eastern United States. It is a commonly occurring plant in many types of pastures and turf, but it is found especially in Kentucky bluegrass fields. This stolon-producing (stem tissue that grows along the ground) grass can generate dense stands because the stolons root at the nodes and produce dense, fibrous root systems.
The leaf blades are smooth with few hairs and are a grayish-green color with a loosely spreading growth habit. Nimblewill emerges in the spring and grows throughout the summer. It thrives under a wide range of climatic conditions, especially during the dry summer months usually encountered in Kentucky. The plant turns brown in winter and is considered unsightly by many horse pasture managers.
One reason nimblewill persists in pastures is because horses, and other animals, rarely eat this plant. Mowing is ineffective as a control tactic. Currently there is not a herbicide available that will control the nimblewill and not cause severe damage to desirable pasture grasses.
For more information about Nimblewill check out the following sources:
- University of Nebraska-Lincoln – Weed Control: Nimblewill
- American-Lawns.com – Weed Control of Nimblewill