I made a sourdough starter. It just kind of sat there, until I added oatmeal.Along with the compost I have used a cup of oat meal, and 2 cups of worm castings and watch the soil come alive. I have just watered with "FPJ" Fermented plant juice. Take all of your plant cleanup and put it in a 5 gallon bucket fill it with water and let it set for a week or two and you will see a difference. Watch out with leaf mold if it is not completely composted it will hold too much water. Just my 2 cents.
I use it because I understand it to be good fungal food. It seems to help with soil aggregation. It’s available and cheap.
Maybe I shouldn’t have brought up using uncomposted leaf. I use a very small amount. Maybe 5 uncompacted gallons to 100 gallons of soil before letting it “cook”. Too much and they tend to mat up.