The heat can cause adverse effects on the grass, almost scorching it with the addition of the fertilizer. If you want to control weeds that are late to emerge, then you need a weed and feed product ...

Compost tea, weed tea, fertilizer tea ... The plant not only contains the N and the K of the N-P-K (nitrogen, phosphorous, and potassium) nutrient trio essential to commercial fertilizers, but it's ...