I've had a long fascination with Lithops, although I gave up trying to cultivate them many years ago. Now thanks to the great info resources here on the forum, I think I'd like to try again, and this time armed with the proper cultivation advice. Before I give it a go, I could use some advice to prepare for what I'll need to do:
1. I just looked at a post Ian was addressing on the matter, and he said that Lithops should have regular waterings in fall and spring, with some watering in summer as long as it's not too hot. My heat waves are short and infrequent, so in the 90-95 degree range. Otherwise, my daytime temps average in the mid 80s over summer, and it sounds like a little watering would be okay as long as I avoid watering in a heat wave. I can keep Lithops dry in winter thanks to an effective rain shelter over my collection. Frosts are almost unheard of in my part of L.A. But not impossible, and if they're vulnerable to any overnight temps in the 30s, I can bring them inside. Do I have that part of it right here?
2. I'm still using cactus mix from the Califorina Cactus Center for certain things. It seems to be fine for my other succulents (all two of them), but on its own the mix gets compacted after repeated waterings. The CCC mix really needs a good amount of pumice added in, and I can tell the difference when the potting medium drains more freely. I think perhaps a 50/50 ratio of CCC mix to pumice should suffice. Any thoughts about whether the ratio should be different?
3. I have a very limited amount of space for my collection, but there's some room left for more plants. I'd be happy with a 5" pot I can allocate for a few Lithops. How many could I fit in the pot? Also, I don't know how extensive their roots are, so should they go into an Azalea or standard pot?
4. The CCC has a nice selection of Lithops on-hand. Is it okay to mix diferent species in the same pot? (As if you didn't already know I'm such a newbie!
Thanks so much for sharing this advice with me, and it would be so nice to have some of these fascinating plants in my collection!