Above the surface plants crowding you out? Rodeo Herbicide is effective on nearly all Emergent Plants like Cattails, Grasses, Bulrushes, Purple Loosestrife, Aligatorweed and Water lilies. Rodeo is systemic - kills the roots for multi year control. There is not a more economical way to control tall weeds. Mix the Rodeo concentrate with water and a non-ionic surfactant (See DyneAmic Surfactant) and apply by using a back pack or hudson type sprayer. For Cattail or Lily control wait until plants are mature. Apply to dry plants. No water use restrictions.