(This plant comes in a 3.5 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: Usually pink to dark-magenta or dark-red. Flowers are produced in late spring and remain open for three or four days.
Cultivation and propagation: It grows rather slowly and needs a very good drainage to avoid rotting. It requires also an appropriate air circulation and is sometime grafted to avoid root problems.
Sun exposure: Light shade when young, full sun later (light shadow may be useful in the hot summer days).
Watering: It requires moderately watering through the growing season. This can be done weekly or more frequently during the summertime, if the weather is sunny enough, but allow to dry fully before watering again. Kept this way, plants will show a healthy growth. Keep rather dry as soon as the temperature starts dropping in October and keep it strictly dry throughout the winter quiescent period since it is very sensitive to any moisture excesses. The plants may survive outside without protection in winter (cold hardy to -5°) but is then somewhat prone to rot, too.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz