The bleach may kill your weeds, but it could also alter the soil, and kill any grass or plants in the area. Only use diluted bleach to kill grass or weeds if you don't have any plans to plant anything else in the area. ... Otherwise, look for other methods of weed control.

Will bleach water mix kill grass?

Weeds Be Gone!

Undiluted bleach can zap weeds growing through the cracks in your walkway or driveway. Spray undiluted bleach on the weeds and let stand. ... Bleach will kill grass, flowers, and other vegetation as well, so take care where you aim!

Will grass grow back after bleach?

It would totally destroy your grass and make regrowth impossible since bleach is used to change the pH balance of your soil. Both the salt and the higher pH level in your soil will make it more difficult for grass to grow. The bleach's broken salt will deplete the soil's nutrients and starve the grass.