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Pennsylvania smartweed

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: Annual

Lance-like leaves on multibranched stems with a low, spreading habit. Young leaves and stems are reddish. Knobby flowers are clustered along spikes at ends of stems. Tolerates a wide range of soils.

Products That Control This Weed

For Gardens

Preen Extended Control Weed Preventer
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For Gardens

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