What is this?

This is growing in a sunny yard in a planter in Northeastern Illinois near the Wisconsin border. It's growing in a planter that should be butterfly-friendly specific. Don't want to yank it if it's beneficial; it's pretty darn healthy!

  • Nevermind. Figured out it was pokeberry. Thanks! Aug 9 '16 at 5:36
  • I added also an official answer. Aug 9 '16 at 8:53
  • Kat, the flower does look like Gooseneck Loosestrife. One of my all time favorite plants! But pokeberry is a cool plant and I am curious as to how it got in your planter? Did you use garden soil for this planter?
    – stormy
    Aug 9 '16 at 20:33

It is Phytolacca americana (pokeweed). It will become very tall. See also https://en.wikipedia.org/wiki/Phytolacca_americana.

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