When weeds sneak up in your lawn, you need ferti-lome Weed-Out Plus Lawn Fertilizer. This weed killer is post-emergent, which means it's made to apply after weeds and crabgrass have sprouted. While controlling weed growth, Weed-Out Plus Lawn Fertilizer also provides a dose of nitrogen fertilizer to strengthen your lawn. Apply now and in 7-10 days you'll see fewer weeds and greener turf!