Scotts Turf Builder Halts crabgrass preventer has a somewhat awkward name that would suggest it's primarily a pre-emergent treatment for crabgrass. But its active ingredient, pendimethalin ...

Scotts Halts Crabgrass and Grassy Weed Preventer works to prevent several types of weed seeds. Apply in the spring to keep crabgrass seeds from spouting and again in the fall as a defense against ...