I’ve mixed the sunflower mulch with sawdust from a local wood shop that uses untreated wood. We also add Starbucks used coffee grinds in there (they’ll save them for you to pick up in the evening), our kitchen scraps plus bone & wood ash (I save our bones and burn them in our fireplace.)
All of this does not produce enough in terms of amount or nutrition to feed our garden. IMO, this makes my attempts at #permaculture feel more like a hobby than an actual environmental solution. #gardening