Quoted:
I was thinking of using wood shavings in my garden. I know I've heard walnut is not good to use. But I have pine, butternut, cedar, aspen, maple and cherry too. Would any of these be a bad choice. Looking to just control weeds and help with holding in moisture.
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I would not use the butternut. It's in the same family as black walnut.
It's
Juglans cinerea. Black walnut is
Juglans nigra. They both produce juglone (which becomes hydrojuglone) at a higher level than most other trees.
Do most trees have an allelopathic effect? Yes.
Do MOST trees have it so strongly that you can't mulch with it?
No.
Of the ones you listed, I would chose the pine and the cedar, then the maple, in that order.
I mulch with wood all the time. But I take steps to make sure there's enough nitrogen available to the plants when I do it, and that's quite a bit more than you'd think, in my experience. You can't OVERDO the N either, so it becomes a close watch, for me, to make sure the plants are getting enough, but not too much.
As always, YMMV.