How do you use baking soda to kill crabgrass?

Answer:

Mix three cups of baking soda and one cup of arm & hammer liquid laundry soap in one gallon of water. Mix the ingredients well and using a home and garden sprayer cover the grab grass with the solution. Works well on St Augustine grass but is not recommended for use on other types of lawn grass. Should see results in 24 hours.

First answer by ID1194846603. Last edit by Wwhallii. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 2 [recommend question].