Smartweed (Polygonum spp.) may have erect or creeping rootstocks. The stem is distinctly jointed, with each swollen joint or node covered by a thin sheath. Leaves are alternate and usually linear to elliptical. Flowers are white, or pink. Smartweed may be emerged or submersed with only the flowers being displayed.
Smartweed can be cut down or the roots can be dug up. It will be difficult to control this way because it will regrow from seeds and remaining roots.
Systemic herbicides, such as Shoreline Defense®, will work to kill the root of the plant.
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 Weed Cutter to remove as much dead material as possible. This prevents an accumulation of dead plant material and muck.
- Treat your pond with the proactive approach to pond management. Use PondClear™, MuckAway™ and Pond Dye to keep your pond looking great.