Leslie, I would do some research before putting borax in your soil. There are 2 issues. Too much or too little boron in the soil can effect your plants, and too much boron can leach into and contaminate groundwater.
This last one may not be a problem in your area, but it is a problem in some parts of the US including an area from southeast Pennsylvania to South Carolina:
"The Newark Basin is the largest of the 13 major exposed Mesozoic rift basins that stretch from Nova Scotia to South Carolina"
(from this website:
http://pubs.usgs.gov/sir/2006/...)
Here is some basic information about the effects of boron on plants:
http://www.gardeningknowhow.co....
I only know about this because we have high levels of boron in the groundwater in some parts of the central San Joaquin Valley due to the agricultural fertilizers that are used. I have not done much research...I just try to be very selective about using products with borax or detergents in them. I try to choose biodegradable products.
