To the wise people;

I am potting a large number of nettles (yes the sad truth) for a biological
project but I really don't know much about the bought compost I'm using-
I've used lots of bags which were moist and crumbly, but I have come across
several (same brand) that are very damp, heavy, slimy and foul-smelling.
Are these still good to use? The 'damp' bags were mostly at the bottom of
my large stack of compost bags, might this have affected them?

Thanks for your help!