I experience that sometimes when bags are left unopened for a few days and
are slightly damp. I have also seen it on grounds on gardens I have top
dressed. I suspect this is the mould/fungi/something from the bag, not
actually from sitting in the garden.

********* I was hoping it wasn't the grounds or environment of my soil
that caused it !

I use grounds alot and haven't seen
any side effects from my plants.


********* None here either, was hoping that it was just a *whatever*
and nothing too toxic, my plants aren't affected by it at all. But it
happened with fall squash and I have yet to harvest, so I was a bit
concerned

Hot composting will get rid of any mould/fungi/something on used grounds as
the coffee is super heated and then breaks down in to humus.


Thought so... Thanks,
BG