When searching for a herbicide, look for products containing triclopyr. This includes Weed B Gon Purple, Weed B Gon Chickweed, and Weed B Gone Max. If you have other broadleaf weeds such as dandelion, Weed B Gon Max would be a great choice b/c it contains 4 active ingredients 2,4-D, which is very effective on dandelion, MCPP, dicamba, and triclopyr. The best time to apply your perennial weed control products for species such as creeping Charlie is in fall (October 1-15). At this time weeds will be going dormant and storing nutrients, and if you spray at this time the weed will actually store the herbicide, giving you the best control response. The second best time is in the spring, right at and after creeping Charlie flowers.
Your only other option is to keep ripping it out until it can no longer sustain itself, but you have to keep after it, not letting it grow much before ripping it out again.
at 10:59 AM on Apr. 30, 2010