What kind of organically formulated spray can be used to treat green moss growing on bushes?
This is likely lichen and is not harmful to the plant. But, if you want to get rid of it, this article will help:
I am trying to grow decorative moss on some large basalt boulders in my 'Japanese' garden. Is there a fertilizer that would be beneficial? Do they prefer an acidic environment? Any tips on how to make them flourish?
If you take buttermilk and some moss, then blend it up (in an old blender you don't intend to use for food), you can then spread this on the object you want to have moss grow on.
The buttermilk help provide the additional acidity the plant likes and the moss pieces will "regrow" to cover the whole object.
I have a moss-looking substance on my trees. What is it? What damage is it doing, and how do I get rid of it?
It is either moss or lichen. Either way it is harmless, but if you want to get rid of it, here is some information: https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm
How do I get rid of moss all over my lawn? Lawn is consistently damp and shady.
This article will help you get the moss out of your yard:
I have ground moss. The soil is sandy, but there is a lot of shade. The moss is worst in the winter. Is there a way to treat it?
This article will help you: https://www.gardeningknowhow.com/ornamental/foliage/moss/killing-moss.htm
How do you get rid of moss around flowers without killing the plant?
This article will help you with that:
On the north side in the landscaping around my house, the ground is solid moss. Will it do harm to the shrubs and plants growing there if I just leave it covering the ground, and can I beauty bark over it?
Here is an article or two that you may find helpful: https://www.gardeningknowhow.com/ornamental/foliage/moss/moss-on-plants.htm