It's not so much whether other soils may work for brix, it's that each soil needs its own specific amendment. All you need is a soil where the mineral balance isn't too far off the norm. Most peat should qualify.
But the lab sells the amendment in 1000 sqft quantities. I run 19 sqft, for instance.
But the lab sells the amendment in 1000 sqft quantities. I run 19 sqft, for instance.