(This plant comes in a 2.5 inch pot. You will receive a very similar plant to the one in the picture. It may or may not be blooming at the time of your purchase. The plant is shipped in its pot to prevent any damage to the roots).
NOTE (THIS PLANTS ARE SEEDLINGS ABOUT 1/4 INCH IN DIAMETER)
It grows into a characteristic, fairly large, granite grey, almost perfect cube. It is quite variable in shape, color and size. It is one of the nicest species in the genus, all of which are oddballs. A very odd species indeed.
Flower: Greyish-green hairy petals with a purple center. It has the largest flowers in the genus, and like the others, the cluster of flowers are fly pollinated and smell like rotting meat.
Blooming season: Regularly blossoms mainly during the end of the summer in the bottom side of the plants but may bloom during the year whenever the growing conditions are appropriate.
Cultivation and propagation: Relatively easy to grow. It needs regular watering, especially during the hottest summer day, provide also some light watering if the green house temperatures in winter are elevated.
Frost tolerance: Winter temperatures must be kept over 10°C.
Sun exposure: It takes a great advantage if grown in very strong light but sheltered from full sun.
Cultural practices: Provide a very good ventilation. It grows quite easily and fast on its own roots.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz