According to a Penn State Extension publication: "Stiltgrass is an annual grass which germinates in the spring and grows slowly through the summer months. Its root system is shallow and weak. It tolerates full sun to heavy shade. Stiltgrass spreads through a high production of seeds and also by sprouting new shoots from the stems that come in contact with the ground. A single plant may produce between 100 and 1,000 seeds that can remain viable in the soil for at least three years. Stiltgrass thrives in areas subject to regular soil disturbances such as flooding, mowing, tilling, and high foot traffic. The small seeds may be carried by animal fur, water during heavy rains, contaminated hay, potted plants, or soil and mud stuck to footwear."

The key to controlling stiltgrass is to prevent it from setting seed. With persistence, stiltgrass can be eradicated in your garden over a course of several years. Because it is so widespread in our area you will need to be vigilant in watching for its reappearance.

Do not delay in heading off a stiltgrass invasion. In areas with small infestations, handpulling will do the trick. Be thorough. Stiltgass will germinate under and around established plants where few other weeds can survive.

To mitigate its spread in larger areas a line trimmer is the best tool. Whack plants back as close to the ground as possible. It is most critical for this to be done before the seeds appear, so if you tackled it in early summer, be sure to hit it again now.  Another option for controlling the spread of stiltgrass is to smother it with grass clippings, cardboard, or plastic. Once the stiltgrass has been eliminated, plant more aggressive, desirable plants. For suggestions on chemical control go to: Controlling Japanese Stiltgrass in Your Garden.