Can anyone identify this weed? I am in western Pennsylvania and would appreciate knowing if it needs to be eradicated.

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2 Answers 2


This looks like some kind of native aster or woodland goldenrod. It is not necessary to pull it.

  • oops, didn't see your comment down there.
    – Tyler K.
    Commented Oct 14, 2017 at 17:05

My guess is Polygonum persicaria; Smart Weed. smart weed

  • Thanks, but I should have waited for it to flower and it became obvious: a native aster. Commented Oct 2, 2017 at 1:25

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