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

Is sodium hypochlorite safe for grass?

The sodium hypochlorite solution is highly toxic undiluted; especially to plants. It is the sodium in the bleach that poses the most risk to plants because it interferes with their mineral absorption. Small amounts of diluted chlorine bleach are safe for plants and in some cases even helpful.

Does sodium hydrochloride kill grass?

Killing weeds with bleach (Sodium hypochlorite) also kills the roots. Spray the weed with undiluted bleach and wait two days. The plant will have turned brown and the roots will have died. ... If the bleach gets on the grass or on a wanted plant, immediately wash it off with water.