My farther has the dreaded mares tail. He spent a fortune on perennials last yeAr and its swamped everything! If he digs it comes thicker, if he leaves it it just engulfs everything. This has come from a neighbour and has now nearly taken over all of his garden. In his veg plot he manages and ignores it then turns the soil as normal, but when it comes to flower beds it suffocates everything. Anyone won or managed the war, please help!