How to Kill Carpetweed in the Winter

Carpetweed (Mollugo verticillata) is an annual weed that emerges in the summer that quickly becomes invasive. It thrives in thin stands of turf grass, so it is a common weed in newly sown lawns. Since the weed grows in grass stands, it is difficult to control with postemergent herbicides without damaging the surrounding grass. The seeds overwinter in the soil, so the best way to kill carpetweed in the winter is with pre-emergent herbicides preventing the seeds from germinating.

Things You'll Need

• Rake
• Pre-emergent herbicide
• Organic mulch

Instructions

1. Rake the lawn before applying the pre-emergent herbicide. This removes fallen leaves or debris from winter storms, so the chemicals have better contact with the soil.

2. Apply a pre-emergent, broadleaf weed killer to the lawn, according to the package directions. These herbicides are rated for specific types of weeds, so your grass is not affected. Pay special attention to bare patches in the lawn.

3. Covering bare patches with a 2-inch layer of organic mulch keeps weed seeds down until you can spread grass seed in the spring.

Tips & Warnings

• The best control for carpetweed is a thick, healthy lawn. Overseeding your lawn and keep it mown to 3 inches shades out the weeds.

References

• Preen: Best Way to Control Carpetweeds
• NC State University: Carpetweed