The right soil for Conophytums is a well-drained and porous substrate, specifically a free-draining loam-based soil mix. If you do not have this mix, the other option is to use a substrate for succulent plants with a considerable layer of gross sand. This type of soil is the best match for these kinds of plants, due to the delicate roots it has, hence the need of a loam-based soil with good drainage that will allow Conophytums spread their roots easily.
