Photo by Dan Tenaglia, courtesy www.xidservices.com

Photo by Dan Tenaglia, courtesy www.xidservices.com

Photo by Dan Tenaglia, courtesy www.xidservices.com

Pennsylvania smartweed

George Weigel

Pennsylvania smartweed

Persicaria pensylvanica (syn. Polygonum pensylvanicum)

Weed Characteristics

Other Names: pinkweed, Pennsylvania knotweed, pinweed, hearts-ease, purple head, swamp persicary

Leaf Type: Broadleaf

Flowers: Pink, white

Leaves: Pointed leaves with smooth edges; some hair

Life Cycle: Summer annual

Lance-like leaves on multibranched stems with a low, spreading habit. Leaves are lance-shaped and alternate along stems, green, and may have a black or purple mark in the center. Young leaves and stems are reddish. Knobby pink and white flowers are clustered along spikes at the ends of stems. Tolerates a wide range of soils.

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