I made some (mostly) wood ash yesterday. Went around and picked up twigs from our thorny hardwood trees, broke them up and shoved them in a tomato paste can from the cafeteria. Poked vent holes in the bottom, put a couple pieces of cardboard and dried sugar-cane scraps in the middle and lit them on fire. It burned and then smoldered for several hours and left me this morning with a nice little bit of ash.
I wanted to use ash as an additive to my gardens, but I'm curious how others use it. I've read studies where urine (my primary fertilizer) mixed with ash has better results. But I didn't see how the combination was made.
I plan to sprinkle a bit around some of my flowering trees and plants, and put some in my "super-sawdust" (https://permies.com/t/121746/charging-sawdust
). But past that, I'm curious how else I can use this source of fertility.
Also, and very important, how much is too much?