Re: using Borax for Creeping Charlie - the recommended dose was to make 3 % solution (a paste of 10 oz of Borax in 1/2 cup of warm water, then to dilute it in 2 and 1/2 gallons of water) and spray it on an area 25 square feet. I appreciate the issue of salt and how it would affect the PH. I will try it on a small area and see what happens this spring.
We have an infestation of Creeping Charlie in our cottage lawn in Ontario where they do not permit use of chemical weed killers. A neighbor suggested spraying a solution with 20 mule team borax. Has anyone had experience using this rather than using a chemical weed killer?