Break up the soil with grit 'For heavy, clay soil dig in some horticultural grit – such as Westland's Potting Grit from Amazon – to improve drainage,' advises Jekka McVicar VMH of Jekka’s ...

You may be surprised to learn that the common mineral components of soil — clay, silt, sand — are not present in potting soil mix. It usually includes pumice, perlite and vermiculite ...

It consists of different sizes of particles, classified as clay, silt, or sand, which make up the soil texture. Thus, bags of potting soil, or garden soil, are intended for in-ground use.