Dealing with Creeping Charlie???????
The BEST time to apply weed control is after the first frost and I'll tell you why. In the fall, after the first frost, plants start thinking wow WINTER is coming and we have to eat all we can to survive as most store food in their root system. They still take in nutrients until the ground freezes but after the first frost if the best.
If you have a patch of creeping charlie, spray it with a Trimec product as over the years have found to give the best results. This is the ingredients that you want to look for on the label - Isooctyl, 2,4-dichlorophenoxy and Dicamba.
Now if you spray at this time, you will get a better kill rate with the product that you are using. The next best time to spray is during the Spring when they are blooming. Again this is when the plant is taking in what they can to produce that flower and therefore will soak in the weed killer better at this time.
So you see, creeping charlie can be killed and don't blame the product - it's all in the timing.
For more info on gardening check out my blog http://nancyradlingerjustmyopinion.com/