[Bonanza]

Originally Posted by Golden Domer

New to the Villages, having just purchased a pre-owned home in Oct 2013 and now noticing what seem to be a "black - mold" forming between landscape stones . Any ideas how to prevent? Clean / remove? Thanks for the help.

My guess is what you really have is algae.
Like Kathie suggested, pressure cleaning will remove it.
You can also try diluted bleach in a spray bottle or
even just a hard spray with your hose,
if you don't have a pressure washer.