| I've never actually used it, but I would mix it with some corrugated cardboard (box material) and maybe run sume water through it before I used it. I think it would be fine but just to be safe I would probably let it age for a month or so. It does have some salt in it, but that is a result of the manure used to make it. Here is a link that might be helpful if you wanted to read a little more about it: |
Here is a link that might be useful: musroom spawn