Pilosocereus pachycladus

A tall, columnar cactus with thick, blue-green stems and white spines, often used as a landscape plant. Also known as Hardy Blue Torch Cactus. 

How to care for your Pilosocereus - 

Water: Water sparingly. Its best to avoid watering over the winter months

Light: They enjoy bright but indirect sunlight, direct sun can cause burns

Humidity: Average room humidity levels will keep this plant happy

Temperature: They prefer warm temperatures about 20 degrees C but best to be kept away from cold drafts.

Toxic to cats & dogs? No

Air purifying? No