Although Scotts rebranded its fertilizer / weed killer combination , homeowner still use the " weed - n - feed " moniker when refer to Scotts Turf Builder With PLUS 2 Weed Control . The Scotts Co. also alter the original Scotts Weed and Feed 22 - 3 - 3 preparation slightly , removing dicamba , an weed killer , and sulfur . Although Scotts and many other fertilizer company still offer plant food / weed killer products , researchers , governments and environmental groups have concerns about the effectiveness and detrimental impacts of weed - n - feed combinations .
Fertilizers
Scotts Turf Builder With PLUS 2 Weed Control is a complete fertilizer . Complete fertilizers admit all three major nutrients — nitrogen , orthophosphate and potassium . Scotts adds urea as a seed of N , hike quick brand growth . Ammonium phosphate encourages strong etymon development , while K chloride releases potassium , a nutrient authoritative to new growth . Keep in judgment that your lawn may not involve extra fertilizer , and adding a weed - n - provender ware to your steady routine might contribute to fertilizer overflow and groundwater pollution . essay your grease before fertilizing , cleanse up any spills and follow directions cautiously .
Pesticides
Scotts Weed and Feed uses a compounding of 2,4 - dichlorophenoxyacetic acid ( 2,4 - ergocalciferol ) and 2-(2 - Methyl-4 - chlorophenoxy)propionic acid ( mecoprop ) for weed control . While 2,4 - D break down relatively quickly , have a half - life of seven to 10 days , the slower - acting mecoprop may remain alive for two months or more and is water soluble , making it a groundwater taint jeopardy , agree to the Extension Toxicology internet . Grasses metabolize these herbicides . Broadleaved weeds , however , suffer the full effects . Your decorative plants may have root extending under the lawn , absorbing weed killer that percolate through the lawn and into the fundamental soil . If you have cosmetic plant fence your lawn , use a spot skunk treatment rather of apply herbicides over the integral lawn .
Concerns
Health Canada , a section of the Canadian government responsible for for consumer safety and environmental security , released a statement restricting sales of fertiliser / weed killer combination ware . After December 2012 , retailers will not deal mourning band - n - provender product in Canada . Health Canada stated that the decision " is not based on the health or environmental peril assessments but rather the nature of compounding product . " Using a combining product often forces homeowners to apply herbicides where and when they are not needed , the agency said .
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