From my notes:
The basic recipe is to mix sphagnum peat moss (or leaf mold and/or coco coir), aeration bits (pummice, turface, scoria, perlite, vermiculite, rice hulls, calcined clay...a mix of different sized material is best), and compost (usually thermophilic compost and worm castings). Most run something like 25-33% compost, 25-35% aeration and the rest is peat. You would be just fine running equal parts peat, compost, and aeration. Use whatever you can get your grubby little hands on. This is your base. Diversity is the best, but don't bother having a bag of expensive rock dust mailed to you. The idea is to use the recipe as a formula to utilize what you can get.
Now it can be a little confusing for the uninitiated---we're going to have to amend. Here is the post from a guy you may know as Clackamas Coot that really got me going in the right direction:
"I use 3 mixes to keep things straight in my old brain. They are as follows:
1. Food Mix
2. Fix-It Mix
3. Mineral Mix
Food Mix
You want about 2 cups of your food mix - however you get there. You're going to use (he was responding to a guys question about how to mix everything he already purchased -ed.) alfalfa meal, fish meal and bone meal. Mix up a large amount with equal parts (by volume and not by weight) and add 2 cups of this mix to your soil.
If you were to decide that you wanted to add canola meal (aka rape seed meal), flax seed meal (aka linseed meal), et al. then add the same volume of this to your mix but you're still only going to use 2 cups of the final mix. That total amount that you want to use does not increase - you're simply making your Food Mix more diverse( a worthy goal, IMHO)
Fix-It Mix
You're using kelp meal and a combination of neem and karanja meals. Again mix these in equal parts (by volume) and add 1-1.5 cups of this mix to your potting soil. If you were to add crab meal (another good Fix-It component) you would still add the same amount even with the addition of another agent, i.e. 1-1.5 cups.
Mineral Mix
You're using azomite and green sand - mix these together like the other mixes and of this mix you'd want to add about 1 cup to your potting soil. If you were to add limestone (or Oyster Shell Powder) and agricultural Gypsum (both available at Home Depot, BTW) you'd add these minerals by the same volume but you'd still only use 1 cup of however a diverse mix you might come up with.
Glacial Rock Dust is different and its application rate is 4 cups to 1 c.f. of potting soil irrespective of the other minerals you decide to go with.
All the amounts above on all of the mixes are for 1 c.f. of potting soil or 7.5 gallons (allegedly)."
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Strong enough for a man, but pH balanced for a woman.