How could I resist this post
Is that tall one a Pleiospilos (canus) compactus?
Probably no water for the Lithops until September. I've heard about summer dormancy being a problem in very hot locations (hence leave them dry for the hottest part of the summer), although this isn't something I'm very familiar with. When did the little L. karasmontana lose all the other heads? Winter or summer?
In Europe, northern Europe at least, all Lithops are treated as summer growers. They are kept completely dry through winter, watered in spring when the old leaves are done, watered as (and if) needed over summer and then watered in autumn until flowering. In habitat some of them, a majority by number of species although none of the ones you have, come from winter rainfall areas. The ones most common in cultivation are almost unique amongst mesembs in coming from arid areas with little or no winter rainfall, just erratic summer or late summer storms. You won't go wrong watering in spring and autumn, just make sure last year's leaves are gone before you start deep autumn watering. Remember, if in doubt, wait. You simply won't kill a Lithops by underwatering. Your best bet might even be to let them retreat below ground in summer like they do in habitat.
Very nice!
