Pachycereus pringlei

The tallest cactus species, with a massive, tree-like structure, native to Mexico. Also known as Mexican Giant Cardon.

How to care for your cactus - 

Water:  Water the plant when the top half of soil is dry. Allow the water to drain out of the pot and remove any excess from the saucer. During autumn and winter, water lightly only every 3 to 4 weeks if in a warm spot. If kept cool, do not water.

Light: Full light 

Humidity: Dry conditions would be sufficient.

Temperature: They need warm temperatures about 20 degrees C. but like a cool winter rest