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How did the weeds get here?

September 14, 2009

* This is the first of a monthly segment on frequently asked questions

Volunteers rolling up Ivy in Frink Park

Volunteers rolling up Ivy in Frink Park

Many flowering invasives such as Herb Robert and morning glory were planted by gardeners. Invasive knotweeds and English ivy were planted by landscapers for their ability to grow quickly and   create natural fencing barriers. Non-native blackberry was cultivated for its fruit, and plants like the St. Johnswort were introduced for their medicinal benefits.

Others such as Eurasian water milfoil were accidentally brought across the oceans in shipments or carried on ship ballasts.

While the invasive plants we remove at work parties have come to the Puget Sound region in different ways from different places, they all share an aggressive growth pattern that allows them to drive out the native plant communities that have existed here for centuries. To join in the effort to restore biodiversity and functioning of urban natural areas in Seattle, Tacoma, Redmond, Kirkland, and Kent, visit our partnership websites linked in the right sidebar of this blog. We hope to see you soon!

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