A selective herbicide recommended for use on thistles and rushes in established grassland. MCPA is a well known and long established herbicide. It can achieve excellent results once used at correct timing and growth stage. Thistle and rush control is very affordable when treated with MCPA. This is not a clover safe product. Apply to grassland 7-10 days before grazing and 21-28 days before cutting hay or silage. Pack size 10l (treats 6- 8 acres).