American Pondweed

American pondweed has oval-shaped leaves that spread across the water surface and is also recognized for its brownish-red seed heads that extend above the water on slender stalks. Stems can grow to be six feet in length and cover large areas of water. This coverage can form dense mats that block sunlight from other native vegetation that require it to survive.


  • 1

    Recreational activities such as swimming, fishing, and boating can be impaired, prevented, and even dangerous.

  • 2

    Excessive Aquatic weeds greatly detract from the aesthetic appeal and possible value of the overall property.

  • 3

    Excessive growth can lead to fish stunting, overpopulation and in extreme cases, fish kills.

  • 4

    Aquatic weed overgrowth is ideal for algae growth and leads to increased insect growth for mosquitos.

  • 5

    Too many weeds impede water flow in drainage ditches, irrigation canals, and culverts, causing water to back up.


American Pondweed can be found in most of the contiguous states.

Similar or Related Plants

It is frequently misidentified as Illinois Pondweed .