What chemical kills creeping Charle and where can I buy it?
Triclopyr and dicamba are 2 broadleaf herbicides for creeping charlie. Both of these are available at most hardware stores and Home Depot, lowes, etc. Herbicides are required to list which plants are susceptible to the product and which grasses it can safely be used on. Most herbicides work best when the plant is actively growing; in this case that means when weather starts to cool. Read the instructions carefully because it may suggest repeat applications. Depending on how extensive the weed is, you may want to overseed the lawn early this fall and start it on a regular fertilizer program. Again, the herbicide label will tell you how long to wait after the application before sowing. Here is an article you might find interesting: https://www.thespruce.com/how-to-kill-creeping-charlie-2131200