Newt

Makes sence Will. Except one thing...

"Lastly (for now) as I have said before, sidewalk moss and such may contain residue of pesticides, fungicides, herbicides or other harmful chemicals due to it just being there when applications are made."

Either way you are collecting moss to start with so if they had anything on them then it would still go into your plantings right? Or am I missing something?

One thing that would be a great advantage though is many times I leave the moss in my plantings and they often die in the full sun that the bonsai love. In the past I have had to collect more, nice looking stuff, were using your method I just cut up the dried moss and re-use!

Newt

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