Astrophytum myriostigma cv. Onzuka has snowy-white, heavily speckled epidermis with fabulous markings much like the ‘kabuto’ asterias. The white marking varies considerably from plant to plant and there exist an enormous number of different designs, and also plants change their appearance in age and they are full of surprises as they grows. As they become mature, they attain a maximum size of 8-10 cm (20) cm in diameter.Although regarded as a choice and difficult plant in cultivation it is relatively easy to grow. It is sometime seen as a grafted plant but grows very well on its own roots too. Water sparingly from March till October and keep perfectly dry in winter at temperatures from 5 to 15 degrees centigrade. (but it is hardy to -7°C for short periods). The epidermis is harder than in the normal myriostigmas and cracks easily if plants are overwatered. In the rest period no high atmospheric humidity!! Sun Exposure: Light shade to full sun.Be careful: The epidermis of ONZUKA is harder than in the normal myriostigmas and cracks easily if plants are overwatered.
