Read more: Homemade Weed Killer That Does Not Kill Grass ... neglected spots. The best defense against crabgrass is ...

Preen Weed Preventer Plus Plant Food claims to simultaneously solve your weed worries while nourishing the plants you love, ...

Crabgrass is best controlled with herbicides commonly referred to as preemergence or preventers. These chemicals kill the weeds as they are germinating before they have a chance to establish.