Controlling Goosegrass Weeds: Treatment And Control Of Goosegrass In Lawns

By Bonnie L. Grant

Goosegrass (Galium aparine) is an annual weed found in warm season turf grasses. The grass seeds readily and spreads on the wind from lawn to lawn. Find answers to what is goosegrass and learn how to control it in order to grow a healthier lawn. The methods on how to kill goosegrass range from cultural to herbicidal. Goosegrass weed control is essential because the rapidly spreading plant can take over entire areas of the lawn.

What is Goosegrass?

If you have identified the splayed tufts of grass with numerous finger-like blades in your lawn, you will need to investigate how to kill goosegrass. The plant can become established even in hard, compacted soils and is very resilient. The thick leaf blades are difficult to cut with a mower and even after a close trim, lawn grass will look ragged and unkempt if goosegrass is present.

The plant is most obvious in warm summer periods, but may persist into winter in temperate zones. The thick, rough blades radiate from a central area in spikes of 2 to 13. Each blade is flat with slight serration at the edges. The color is emerald green with older blades bearing a touch of white on damaged edges.

Control of Goosegrass in Lawns

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Controlling goosegrass is essential to an attractive lawn. The tough plant requires vigilance to keep the seed heads from forming. Keep your mower blades very sharp so they can remove the inflorescences before they seed.

Overwatering and extreme culture can promote the growth of the weed. Patchy lawns and areas with heavy foot traffic will have the highest populations of goosegrass.

Control of goosegrass in lawns relies upon proper maintenance first and pre-emergent or post emergent chemicals for flare ups. One simple way to help prevent the weed is by aerating. Aeration increases the porosity of the ground and discourages the formation of goosegrass.

Goosegrass Weed Control

There are several pre-emergence herbicides available for controlling goosegrass. Pendimethalin, dithiopyr and prodiamine are a few chemicals that are useful in combating the weed. They are either used singly or with other chemicals. The correct formula will depend upon what type of sod is in your lawn.

Post emergence herbicides, such as glyphosate (Round-up), are useful as spot applications and can be used repeatedly during the season to control the weeds before they seed. Be sure to consult the label of the product you choose for goosegrass weed control.

How to Kill Goosegrass

Follow all recommended precautions on the product you use to control the weed. Most herbicides need to be applied when there is a dry period to prevent the product from rinsing off of grass blades.

If you are using a spray application for control of goosegrass in lawns, apply it on a windless day to prevent drift that can kill non-target plants.

Pre-emergent herbicides work best if applied in late winter to early spring when soil temperatures reach 60 degrees Fahrenheit (15 C.) for 24 days in a row.

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