weed and feed
n.— «Many landscape trees and shrubs are damaged or killed each year by the careless application of weed killers to lawns, including those found in mixes of weed killers and fertilizers (commonly called “weed and feeds”).» —“Checklist of things for gardeners to do in March” by William Johnson Daily News (Galveston County, Texas) Mar. 4, 2009. (source: Double-Tongued Dictionary)