Sep 10, 2013 - 07:34 PM
Let me clarify this, the bleach and water was not intended as a spray on the yard or grass, but rather on dirt, rock, cement or possible a gravel dog run. Bleach sprayed on grass would kill the grass.
If you are going to spray bleach in this manner, then 1 cup per gallon of water is sufficient. Thoroughly wet the area.
For grass or lawns, you could use ammonia and water. However, the amount would be substantially less. 2 tablespoons per gallon of water is as much as I would recommend. This is the same as applying liquid fertilizer, since nitrogen is essentially ammonium nitrate (ammonia).
Hope this helps.