Steve, I haven’t considered it.

I do not deliberately chase phosphorous. Our soils have a good supply from several years of compost.

All of our ferments get a bit of guano or soft rock phosphate, plus basalt fines, so there is a bit of P in everything we do.

I could not see any reason why dicalphosphate could not be used. There is not much that the biology can’t get into. It is commonly used in cattle licks where the rumen biology has to deal with it.