WinField United Cornerstone® Plus 2.5 Gallon Catalog Lawn & Garden Weed Killer WinField United Cornerstone® Plus 2.5 Gallon Description Cornerstone® Plus is a postemergent, nonselective herbicide that is absorbed and translocated throughout annual and perennial grass and broadleaf weeds for "shoots-to-roots" control. Rates Please contact us for current pricing and availability.
