The peat moss is slightly acidic
The composted sawdust will generally be slightly acidic
and the pearlite provides aearation, and soil friability (adding air and is easily broken up)
and you are in my nightly prayers !
I don't know what happened but I fire vendors that don't meet my needs.
I won't ever use/buy Cisco again because they lied to me about how much power a dedicated switch would draw. I had a tight power budget because it was a Solar Power system. They were off by %200. FIRED. Gone bye-bye in the car-car.
I'm very harsh on my vendors.
/johnny