Water Hyacinth

Description

Water Hyacinth is a non-native perennial plant. It is free floating and grow up to 3 feet out of the water. Leaves are elliptical in shape and have a light blue to violet flower. The root system is very large and fibrous.

Other Names: Blue Shell, Shellflower

Mechanical Control

Water Hyacinth can be controlled by raking or skimming it off the pond's surface.

Chemical Control

Systemic herbicides, such as Shoreline Defense®, will work to kill the root of the plant.


Broad spectrum contact herbicides, such as Ultra PondWeed Defense®, will quickly kill any part of the plant it touches but multiple treatments may be needed throughout the season.

Chemical Application Best Practices

Anytime you use chemicals treat weeds and algae, please keep in mind the following:

  • Treat your pond in sections. Treat only half the pond's surface at a time, if the weather is hot, only treat 1/4-1/3 of your pond. Wait 10-14 days between treatments.
  • Once the weeds have browned, use a rake to remove as much dead material as possible. This prevents an accumulation of dead plant material and muck.
  • Take a proactive approach to pond management. Use PondClear, MuckAway and Pond Dye to keep your pond looking great. For more information, see our article on the Airmax® Ecosystem

Ask an Expert

If you are unable to identify your pond weed(s) using our Weed ID Guide, follow this article to email us a photo.

  • List | Grid

Products

  • Pond Logic® Shoreline Defense®

    Pond Logic® Shoreline Defense®

    Review star icon Review star icon Review star icon Review star icon Review star icon
    Broad Spectrum Emergent Weed Killer Kills To The Roots Long Term Control Of Cattails Kill the roots of even the most persistent emergent aquatic weeds & grasses. Pond Logic ® Shoreline Defense ® is great for controlling cattails or any...
    Read More »
    $39.99–$129.99
  • Pond Logic® Ultra PondWeed Defense® Aquatic Herbicide

    Pond Logic® Ultra PondWeed Defense® Aquatic Herbicide

    Review star icon Review star icon Review star icon Review star icon Review star icon
    Broad Spectrum Pondweed Control Fast Acting Liquid Formula Short Term Control Of Duckweed Pond Logic ® Ultra Pondweed Defense ® works on pond weeds including submerged, floating and emergent weeds. It may be used for short term control of...
    Read More »
    $49.99–$149.99