Q.How Do I Get Rid Of A Growth Which Seems To Be Killing Plants In My Garden?
This ‘mould’ looking growth tends to appear on the nodes of the plant. This growth is appearing both in potted plants and those rooted in the ground within my garden.

GKH_Susan
Certified GKH Gardening Expert
Certified GKH Gardening Expert
Answered on May 27, 2021
It looks like lichens, which are normally harmless. However, they are more often seen on tree bark, but any woody stems can get them. So, something else is killing your plants.
https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm
https://extension.psu.edu/lichen-in-the-garden
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