Outdoor soil mix
I am reappraising my soil mix for nexr year because I wish to make it lighter in weight to carry. This probably means using less black earth and more composted sheep manure and more light media, i.e. moss, vermiculite & perlite, etc..
Questions: (1) What is the maximum non-feeding media you use, that is, peat etc..? (2) What is the maximum organic feeding stuff, i.e. compost of various types, humus, etc.? Would 20% sheep manure compost be too high?
I'm trying to aim in the direction of light media + compost, or as close as I can get.
Ignoring [one] weirdo since 2019.