- seeds are edible.
- seeds can be eaten whole or pounded into meal.
- plants can be cooked and eaten.
- varieties in Ontario are Common knotgrass (Polygonum aviculare), Common knotweed (Polygonum arenastrum) and Mountain knotweed (Polygonum douglasii).
- grows as a weed in a wide range, including dry areas, plains, and subapline regions.
- raw plants eaten in quantity may cause stomach upset and/or diarrhea.