University of Maryland Extension



Polygonum pensylvanicum


Life cycle: summer annual

Growth habit: grows from 1 to 4 ft. tall; leaves alternate, lanceolate, smooth margins, sometimes with a purplish thumbprint marking the 2 to 3 in. leaf; conspicuous ocrea surrounding point where petiole meets stem

Reproduction: seeds from pink flowers in the spike-like clusters
Conditions that favor growth: common weed of nursery crops and landscapes; rarely a problem in turfgrass; tolerates a range of soil types and conditions
Cultural control: Remove young plants before flowers form

Maintained by the IET Department of the College of Agriculture and Natural Resources. © 2020. Web Accessibility