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”)...
volcano mulching n.— «I have seen some landscapers use very deep layers of mulch—a foot or more in tight rings around trees and shrubs. Is this a healthy practice?…This is sometimes called volcano mulching because of the steep sides...