SOIL: Well drained, a typical cactus mix does well. Mine is grown in a mixture of coarse sand and garden loam.
WATERING: I water it all year, but never let it stay wet. It receives more water in the summer. It is in a position where it doesn’t receive any rain.
EXPOSURE: East facing. The afternoon sun is blocked by a wall though I suspect it could take a lot more sun.
COLD/HEAT: It has shown no damaged due to high heat or cold. I have grown it long enough to have put it though everything my climate has to offer (115F-20F). It is protected a little by a wall that does keep the frost away a bit.