Hi Tyler
I've used fleece in my climbing bean trenches to add bulk and retain
water. Seems to rot down well - I mostly use old fleece (meant to get round to spinning it...) or 'dags", ie the bits trimmed off round their bottoms, nice and mucky and available at the right time of year for bean trenching! So added fertiliser too!
You can get anti-slug pellets made of chopped wool - felted I guess. I tried a bit of fleece wrapped round my vulnerable young plants as a slug-barrier, but it didn't work - I think it needs to be chopped up to irritate the slugs. Also the weather was outstandingly wet and the slugs very determined and perhaps I
should have used more than a wisp per plant. It would be interesting to know what the slugs make of your fleece mulch.
I have also put old fleece and dags on the
compost
Cheers
Rosalind