On May 9, 3:45*pm, Billy wrote:

Do you understand now Dave? Dolomite lime is inorganic (in the language
of Chemistry) but is organic in the language of gardening. The sins of
potassium sulfate and superphosphate lie in their production and not in
their nature (unlikely to contaminate crops, or deform fetuses), and
they could be replaced with rock phosphate and potassium ash (wood ash)
in the recipes.

Whereas, the latter two sources are slower release sources
(IIRC), and therefore more useful for building soil fertility in
the ground, rather than in containers. Organic offers
other ways to boost phosphorus, such as encouraging
symbiotic bugs and fungii to process and make available
what little phosphorus already exists.