I have planted them in a very coarse media, like almost rocks, a mix of pebbles, pumice, kanuma, akadama. I think the only soil part there is the one it had when I got it, I did not disturb the roots too much.
During summer, it is ghastly, so dormant with the heat here, so it is in that shady side of my garden. It really shrinks in size, so you know it is going dormant, leaves going much shorter. Very minimal to no watering while dormant. It shows active growth again when late Fall season starts to come back, when temps start to dip in the low 50's or lower overnight. When I saw that, I slowly gave watering, but not much during daytime. I was hoping Mother Nature will give it the moisture it needs. Then we had some rains in early Dec, so it just got rained on, it did not flinch, so it is okay to get wet when it is cool and actively growing, you can just see how much faster the leaves are growing. The buds started coming out when it gets some sunshine, and with the city trees sleeping it is getting more sun. But temps are staying cool, so it is enjoying it.
Right now in winter, it is growing so well, so got to treat it as an alpine succulent, as cool temps as you can give it, watering okay, but not too much, during active growth, lots of air movement. Minimal to no watering during the dry and hotter months.