Cattails are best treated in the late summer and early fall with glyphosate, a systemic herbicide. Glyphosate, when applied correctly, will travel from the leaves to the root system of the plant decreasing the amount of regrowth the following year. AQUA DOC offers cattail treatment as well as cut and removal services. If you prefer to do-it-yourself, we recommend Shoreline Defense in combination with Cide-Kick II or Cygnet Plus. If you have questions about managing your cattails our experts are ready to help, contact us for a free consultation (800)689-5253.