(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).
Blooming season: Flowers are freely produced from June onwards and remain open for only one day.
It is a good beginner cactus and very easy to grow and flower. It is quite resistant. Requires good drainage and very porous potting mix.
Watering needs: needs regular water in spring to fall but do not water again until dry. Also, it is a species that is dormant in the winter and requires very little water (maybe even none) during the cold months.
Frost tolerance: Light frost protection required.
Sun exposure: Requires bright light (protect from strong midday sun). In shade the body color will remain mostly green, while full sun will darken it and give it red/brown body color.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz