any bone dry environment will do for storing LITHOPS seeds... now is the best time to plant these seeds in a well draining cactus mix, strangly enough they require the most water possible with out rotting the plants during their growth into a stable sized plant strong enough to tolerate drought... they are so neat when they begin to grow they look like tiny sand particles, and are almost perfectly round when young... remember to water as much as possible without rotting these tiny plantlets will dry up quickly and die within a day or two with out water... lithops need the maximum sunlight possible without scorching to prevent tall stalky growth... a little morning sun or afternoon sun with very bright shade in between will do fine... or shade cloth will be superior... these southern african succulents need a very wet spring (dont rot them) and a consistant watering schedule during the summer heat to keep them growing and happy, winter stop watering and after a few growing seasons the plant will flower in late fall going into winter before the domant season... not all MESEMBS. (stone crop plants, or stone mimicry plants) use this same watering schedule and dormant period... let me know if you have any other questions

--AARON

humidity and constant water-logging may invite fungus the white powdery mildew is the fastest killer and tolerates bright conditions, and varying temperatures... but any fungicide will ward this killer off... in my opinion keeping the potting material constantly moist not wet will be great... yea the miracle gro cactus mix will do fine... ive even seen them planted in regular potting soil?.?.?.