Fast spreading garden weed - how to kill? #441841 - Ask Extension


Fast spreading garden weed - how to kill? #441841

Asked February 27, 2018, 4:19 PM EST

What is the weed shown in the attached photo and how can we get rid of it. We believe it arrived with some compost. It spreads very fast. Will spraying or tilling it under kill it?

Multnomah County Oregon

Expert Response

This plant is liverwort, which is a moss-like plant that spreads by spores.  It is a common weed in nursery pots, so it might have arrived at your site that way.

Liverworts are difficult to control and are resistant to most herbicides.

Your best bet for management is to scrape the plant out of the area where it is growing and change the conditions that favor its growth (exposed, wet soil with a lot of nutrients).  It might take several rounds of scraping over 2-3 months to totally remove the liverwort.

If this is a lawn area, you might reseed the bare soil so that a vigorous stand of turf can take root and out compete the liverwort.  If this is a landscape area, letting the soil dry out this summer could help.

Please let me know if you have further questions.

Weston Miller Replied February 28, 2018, 11:06 AM EST

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