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Horned poppy #923933

Asked January 26, 2026, 3:30 PM EST

I was wondering if the horned poppy is invasive in the Willamette Valley? I have some seeds and was debating whether to grow them or not.

Marion County Oregon

Expert Response

Thanks for reaching out.
I don't see horned poppy (Glaucium flavum) on Oregon's invasive weed list. You can search that on the Oregon Department of Agriculture's website. Take care!

Brooke Edmunds Oregon State University Extension Community Horticulturist Replied January 27, 2026, 5:28 PM EST

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Horned poppy #923933

Expert Response

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