(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).
Trixantocereus blossfeldiorum (Espostoa blossfeldiorum)
Recommended Temperature Zone: USDA: 10A 11
Minimum avg. temperature: 50°F (10°C)
Sun exposure: full sun to light shade
Watering needs: very rot prone
Blooming habits: tufts of yellowish wool and bristles. The nocturnal creamy-white flowers come in mid-summer, 2.4” long (6 cm).
Bloom color: pale yellow, cream/tan
Bloom time: mid-summer
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz