Japanese Stiltgrass

Weeds taking over your yard is not only unsightly, but it can also outcompete your grass and other native species. This is especially true of Japanese stiltgrass, an invasive species that reached the United States over 100 years ago. It is an annual grass, meaning that it germinates in the spring and dies by fall. 

It is an extremely common weed that many homeowners on the East Coast will recognize. With proper lawn care and preventive measures, you can eliminate this pesky grass once and for all.

How to Identify Japanese Stiltgrass

Japanese stiltgrass is most commonly found near heavily wooded areas, but it can also spread to nearby pastures and fields. It thrives in wet, shaded areas, as well as soil that is regularly disturbed. 

It can be identified by the way it grows in a dense, tangled bed. The leaves are shorter and wider than other grasses, with a distinct silver stripe. The stems are stiff and can climb over other vegetation, blocking their sunlight. 

In early to mid-autumn, the Japanese stiltgrass will flower and spread its seeds. The flowers bloom in three spiky branches of a white or tan color. 

This plant can survive mild frost, but after the first strong cold front, Japanese stiltgrass will die. The leaves and branches turn light tan and remain in a dried thatch throughout the winter. 

How to Prevent Japanese Stiltgrass

One good thing about Japanese stiltgrass is that it has a very shallow root system, making it easy to pull out. Small infestations can be handled by this method as long as you catch it before it releases its seeds, before mid-September. 

If you notice new seedlings growing the following year, mow them as short as possible in late summer to stop the growth. Mowing too early can have the opposite effect, encouraging growth and seed dispersal, so it’s important to get the timing correct.

Larger infestations are much harder to control. Herbicides are available, and most preemergence and postemergence herbicides that are used for crabgrass control will also be effective on Japanese stiltgrass.

The best way to prevent an invasive plant infestation is to maintain a healthy, dense grass lawn. Mulch can also be used to prevent germination in flower beds. 

Quality Lawn Care Services on the East Coast

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We provide the highest quality weed control and comprehensive lawn care services across Maryland and Virginia. Save time, money, and frustration while achieving the lawn of your dreams. Call now to learn more!