A.C., Warren, Mich. Answer: There are several products designed to control moss and algae growth; however, most of these would also stain the porous stone wall. Copper sulfate, a good moss and ...

To lichens and moss, the wall’s dry stones are surfaces where plants can’t compete. For plants, such walls are edges that separate patches of ground into zones that are sunny or shady, windward or ...

Stone walls can be found here and there in other ... in his neighborhood depend on it as a unique habitat. To lichens and moss, the wall’s dry stones are surfaces where plants can’t compete.

Stone walls can be found here and there in other ... in his neighborhood depend on it as unique habitat. To lichens and moss, the wall’s dry stones are surfaces where plants can’t compete.