This perennial spreads by creeping roots. It grows as a clump of arrow-shaped leaves with red-orange flowers borne on spikes from May to June. It thives in acidic spoils but is not usually a problem weed and is easily removed.
The main way to keep this weed under control is through constant vigilance - never allow the weed to flower or seed.
Remove weeds by hand as soon as you see them
Spray with a systemic weedkiller that is absorbed through the leaves of the plant, the active ingredient makes its way through the cells of the plant down to the root. It kills these first and then the foliage starts to die off