Our potting mixes are hand mixed at our plant nursery in Eugene, OR!
My only source for Lithops soil. Period. Hands down the best you can buy!!!!!
I acquired 80+ juvenile (mostly 2yo) lithops 4 months ago, and planted them in four 6-inch terra cotta pots filled with this lithops potting mix. The lithops obviously love it, as almost all of them are splitting and growing new leaves like crazy.
Sometimes lithops just die for no reason, but I've had almost no deaths. Out of 80+ plants, maybe 4 or 5 have died. The rest are in fantastic health. I highly recommend this mix. I used it as-is and did not amend it in any way.