"AKT" wrote:
Thanks, but what is potting soil for if not for plants in the pots?

Potting soil is a mix, all soils are a mix... those labeled potting soil are
generally a lighter less dense mix that enable more air to reach the roots
in a confined space of a pot. But regardless, you can and should amend all
soils to best suit what's planted... you shouldn't use the same soil mix to
pot cacti and violets. And remember to repot often and use fresh soil.