Curious if any of the succulent-lovers on Tildes have any tips/tricks for soil composition. I've been using the basic succulent mix from my local hardware store for years, but I've had some issues with rot. Reddit seems to think that soil composition is at fault for just about all succulent ills, so I've adjusted my mix to be about 50% perlite/sand 50% organic (a.k.a the basic succulent mix).

Still seems like the new mix doesn't dry out quite as fast as the internet thinks it should, though. Does going even more inorganic make sense? My guess from a few years of reading about succulents is that they would probably be happy in even 80-90% inorganic soil to keep their roots dry, as long as they were watered when they needed it. No clue if that's right, though.

I'm very on board with the concept of permaculture, and while I understand the concepts I don't have a good intuition for which plants fix which nutrients. For example suppose I grow basil in my herb garden.

How do I figure out which nutrients it will eventually deplete? How do I figure out a good buddy crop(s) to replenish those nutrients?

Any permaculturists out there that can point me in the right direction?