I made a separate page devoted to internet “research” on this subject. It may be that a blender slurry of buttermilk and moss is an urban legend as Mossin’ Annie says. I tried to use a food processor and never got to to a slurry state. It ended up as clumps of moss with a buttermilk/liquid mix. I spread it on some Durock and left it behind the house in a moist and shaded area. But I have little hope of it working. I will try the method of the third video on Can You Grow Moss.
What is a proper substrate for a vertical wall? Possibly a fiberglass window screen smeared with a clay and dirt mixture – attached to a stronger wood or wire structure.
Or clay and mortar for something more durable.
Many sources on the web claim that one can put moss and buttermilk into a blender and then paint the slurry onto a substrate that will grow moss within a week or so. Mossin’ Annie, who sells mosses and establishes moss gardens say that this is an urban legend that will only result in a sticky mess. But several sources show moss graffiti images. So I am going to try the experiment using 2 mosses that grow freely in my yard. I have purchased several substrates to use. Each must be strong enough to hold up against wind and weather as a vertical wall.
- Cement board
- Recycled rubber mat
- Polyester mat
- Wire mesh with mortar mix
I have also purchased a misting system with a charcoal filter and timer to run off my garden hose. The charcoal filter is to remove chlorine and other city chemicals that might damage the mosses. I did not intend to use galvanized wire mesh as zinc is supposed to prevent moss growth. But since I have some and it is so common, I will coat it in concrete to see if that is enough coating to prevent contact with the moss.