Watermeal is recognized as the most difficult aquatic plant to control. It is the smallest of all flowering plants, and is dark to light green in color and resembles tiny grains of sand or cornmeal. From a distance, it looks like very small dots covering the pond. The body is rootless and individual plants are barely visible to the naked eye. Reproduction occurs by splitting, so complete coverage of a pond’s surface is rapid.


  • 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

    Floating weeds can blanket the entire surface and decrease the oxygen to dangerous levels for fish.

  • 5

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


Watermeal can be found in most of the contiguous states.

Similar or Related Plants

It is frequently misidentified as Algae, Duckweed .