Knotweed is an early germinating member of the smartweed family. It normally shows up around mid-march and is often mistaken for a grass because of the long narrow cotyledons. It tolerates compacted soils and so is commonly found along sidewalks and paths as well as golf tees. Sometimes it is the only thing that will grow in heavy compacted soils. Associates well with goosegrass.
Photo by Dr. John Meade, weed scientist emeritus
Rutgers NJAES Cooperative Extension
Photo by Dr. John Meade, weed scientist emeritus
Rutgers NJAES Cooperative Extension