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.