(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).
Flowers: Very small, but usually many bloom at a time, olive-green to dark maroon with dark spots.
Watering: It needs regular watering, especially during the hottest summer days.
Frost tolerance: Winter temperatures must be kept over 10° C. (But it can withstand a winter night temperature of around 5°, or less for short periods)
Sun exposure: It takes great advantage if grown in very strong light but sheltered from full sun.
Special cultural practices: Provide very good ventilation.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz