Control Spatterdock, Cow Lily
Manual/ Mechanical Control:
Physically cutting spatterdock and digging up the roots can be a somewhat successful way to manage this plant, but spatterdock can regrow from any remaining roots or seeds.
Imox herbicide and a surfactant will effectively control spatterdock. These products together are called our Cattail and Water Lily Control. Thoroughly wetting the plants in late summer or early fall is the most practical time to treat. This is when spatterdock plants are directing their energies to the root system, which helps pull the herbicide down to the roots to kill both those and the vegetative portions.