I would give it a test run before you mix up a lot of it. Start with something like 2 parts peat : 1 part chicken manure. Manures are usually considered "salty" meaning there might be plenty of calcium and magnesium already there. Not knowing what elements are there makes it tough to say if you...
Poultry scat is a really amazing addition to any herb grow. There is something special about it that truly increases flavor/aroma complexity and intensity. You don't need a lot, but done right, you can use it as a main ingredient in your mix.
I'd start with a smaller portion.. if your pot is...