Some important ingredients in Scotts Weed and Feed fertilizer are urea, 2,4-Dichlorophenoxyacetic acid, atrazine, propionic acid and mecoprop. The primary nutrients are nitrogen, phosphorous and potassium.
The most common element in Scotts Weed and Feed is urea, a high-nitrogen compound common in animal urine. Atrazine, 2,4-Dichlorophenoxyacetic acid and mecoprop are herbicides. Propionic acid is an antibacterial agent. Scotts lists each product's fertilizer ingredients on the label or in a material safety data sheet.
Scotts Weed and Feed fertilizers use three numbers to indicate percentages of the three primary nutrients nitrogen, phosphorous and potassium. Scotts Turf Builder Winterguard Fall Weed and Feed, 26-2-12, for example, is 26 percent nitrogen, 2 percent phosphorous and 12 percent potassium.