Atrazine is a preemergence herbicide used to control broadleaf and grassy weeds in turf grasses. Apply atrazine in early spring before the grasses' growth season and weeds emerge. After weeds and seed heads form, atrazine has little to no weed killing effect.
About this Author
Joyce Starr is a freelance writer from Florida and owns a landscaping company and garden center. She has published articles about camping in Florida, lawncare, gardening and writes for a local gardening newsletter. She shares her love and knowledge of the outdoors and nature through her writing.