Spatterdock, Nuphar, is a network of rhizomes that produce heart shaped leaves and yellow flowers. Other names for this plant include yellow cow lily and bullhead lily. This is often confused with water lilies. Yellow flowers produced by spatterdock plants are much smaller than lilies, 1-2 inches in diameter.
Spatterdock spreads both by rhizome, and seed distribution. Growth typically occurs in 1-2 feet of water. This plant is native to the eastern United States.
The spatterdock lily provides a wide range of pond benefits. It is an excellent source of cover and habitat for fish. Spatterdock also provides food for aquatic life and animals out of the pond.
Chemical treatment options:
For early season control, apply Navigate granular herbicide. This is a systemic herbicide that will kill to the root system of Spatterdock.
For mature weeds (flowering), spray the pads with CattPlex, glyphosate. This is absorbed down to the roots. CattPlex has no water use restrictions, and is safe for fish. It will not work on spatterdock until leaves have surfaced.