What is this?

Asked June 25, 2020, 6:48 PM EDT

and how do I kill it? It is very low growing, on the sunny West side of the house, under the shade of day lilies and a hydrangea bush. Seems to be invasive. One friend thought it was a fungus but I can't find a fungicide to target it. Another friend thought it was a lichen and to try salt water to kill it. Any help you can provide?

Marion County Oregon

2 Responses

Thank you for the images.

It is liverwort, Marchantia polymorpha, a common nuisance that grows vigorously on the soil surface chronically moist areas.

Management should focus on drying out the affected area by
1.) Reducing shade, and
2.) Reducing moisture.
(Although some resources state that high fertility encourages growth, I don't find that to be true in my garden.)

Some management strategies:
- Prune plants that shade the affected area.
- Improve drainage in the area and/or aerate the soil.
- Avoid soil compaction. For instance, don't walk on wet soil.
- Change irrigation pattern/habits.
- In otherwise bare areas, scrape off the liverwort and discard in the trash.

And, don't use salt, or salt water in the garden, as it may damage your soul.

Thank you. That is it exactly-per searches on internet of your identification of liverwort. I appreciate your expertise and knowledge.
Thank you again!