I have a new customer that has approximately one acre of lawn. About 3/4 of the lawn is infested with ground ivy to the point that no grass or other weeds exist in that section. The Lesco rep told me to use two applications of Momentum...once now and once around Memorial Day. Is this an effective product for ivy? I know the label indicates ground ivy, but others have told me to use 3-Way because it is more effective on ground ivy. The reason I am concerned about this is because two other companies over the past 6 years have tried to rid the property of the ground ivy...thoughts...coments or suggestions.