Recipes for Success: Building Your Own Organic Potting Soil https://www.maximumyield.com/recipes-for-success-building-your-own-organic-potting-soil/2/1006 sorry
yes i always mix a bunch of stoff in to my pro mix like
subcool super soil
25-50 lbs- WORM CASTINGS
5 lbs- BLOOD MEAL (12-0-0)
5 lbs- BAT GUANO(0-4-0)
2.5 lbs- BONE MEAL (3-15-0)
2.5 lbs- FISH BONE MEAL
3 cups- OYSTER SHELL
3 cups- KELP MEAL
2 cups- AZOMITE
1 cup- DOLOMITE
3/4 cup- EPSOM SALT
2 Tbsp- MYCORHIZAE
Mix thoroughly and I mean very thoroughly, breaking up any large clumps and chunks, making sure all ingredients become completely mixed. Then store the soil mixture in 3 large plastic covered garbage cans. Water the mixture thoroughly but do not drench or over water, be sure all soil is moist. Cover and allow to sit 6-12 weeks. As far as we know the soil does not have an expiration date, however we have always used ours within a year. The soil mixture needs to be above freezing but doesn't necessarily need to 'cook' as Sub had originally said. Do not become alarmed if you get white webbing, also on the same note, do not become alarmed if you do not get webbing. Lack of webbing could be the cause of the sun hitting the cans and burning the webbing off, it will not disrupt the process of your soil if it does not get webs due to sun. Best case scenario is to store at approximately 78 degrees out of the direct sunlight.