To kill creeping charlie but not grass, the best option is to use a postemergence broadleaf herbicide containing salt of dicamba or triclopyr. These active ingredients are often found in combination products, such as Trimec or Three Way Lawn Weed Killer, so check the ingredient list on the label to see if it contains dicamba or triclopyr. It is important to always read and follow label directions when using any pesticide.

Other tips to prevent creeping charlie from returning and maintain a strong, healthy lawn include:

• Prune trees and bushes to allow more light through, as creeping charlie prefers shady spots.
• Seed your lawn with grass seed products that thrive in the shade.
• Mow regularly at a height of 2-3½ inches, fertilize as appropriate for the grass type, overseed in the fall, and water properly to improve turf health and density.
• Dispose of all creeping charlie in the trash, as even a small piece can grow back.
• Apply grass seed to any bare spots and maintain a healthy yard to prevent creeping charlies return.
• Use a tarp, layers of newspaper, or cardboard to block sunlight and smother creeping charlie.
• Use triclopyr with 2-3 applications about 7-10 days apart, preferably in fall or spring, to kill existing plants.

It is important to note that controlling creeping charlie takes some work and is frequently not totally successful. Herbicide applications may be needed on a regular basis for many years to completely eliminate the weed.