Shiny Geranium Spreading Noxiously

by Kate Yturri, Judy Winer and Gwen Stamm, SJC Master Gardeners, Class of 2013

The dainty, flowering noxious shiny geranium

The dainty, flowering noxious shiny geranium

Invasive Plant Species/Noxious Weed Alert:
Please be on the lookout for Shiny Geranium (Geranium lucidum) in your yard.

This fast growing, small plant has been recently spotted on Orcas Island near the golf course and in Moran State Park.  It is low growing and spreads quickly across a lawn, into ornamental beds and even potted plants.  It has rounded, lobed shiny leaves, red stems and tiny pink or magenta flowers.  It is often confused with dovefoot geranium, which has similar shaped leaves that are NOT shiny and stems that are green instead of red.  Shiny Geranium reproduces by seed and has the capability to forcefully eject seeds when ripe.

It is usually found in well-shaded woodlands and forest openings as well as in full to partial sun.  Controlling it is difficult.  Hand pulling alone is not successful.

The distinctive red stalks of shiny geranium

The distinctive red stalks of shiny geranium

The application of a heavy layer of mulch usually works. Herbicides such as glyphosate and broadleaf specific triclopyr applied prior to blooming should be a last resort.

“Noxious weed” is the legal term for invasive plants that are so aggressive they harm our local ecosystems or disrupt agricultural production.  Shiny Geranium is a Class A noxious weed in Washington, which means it is invasive but still not so widespread as to be impossible to eradicate.  The Noxious Weed law in Washington requires that all property owners help prevent and control the spread of invasive plants.  Eradication of all Class A weeds is required by law.  Please attempt to remove this plant if you find it.

If you have questions about or need help identifying this plant please call Judy Jackson with the San Juan County Noxious Weed Board at 376-3499.

Shiny Geranium infestation

Shiny Geranium infestation

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Photo credits:
Top photo by Ben Legler
Center and bottom photos courtesy WA State Noxious Weed Control Board

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