Plants Database
Pasture Weed Control Database
Pennsylvania Smartweed
The key to Smartweed control is treating early before the weeds become too well established. GrazonNext HL or Grazon P+D are effective on this weeds less than 12 inches tall. As the weeds get older, the percent of control declines. Chaparral at 2.5 ounces per acre is also effective.
![Pennsylvania Smartweed](https://plants-database.s3.amazonaws.com/polygonum_pennsylvanicum.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAQCTTXN4WB7YGDWRU%2F20240727%2Fus-east-2%2Fs3%2Faws4_request&X-Amz-Date=20240727T033103Z&X-Amz-Expires=3600&X-Amz-SignedHeaders=host&X-Amz-Signature=fa0c123f2107213d532e7ffc5e40b2967f625b8b47450497c19515d2ac7192e1)