Consolea rubescens is a nearly spineless cactus that eventually becomes a tree up to 20 foot (6 m) tall tree, with a trunk up to 6 inches (15 cm) thick. Its flattened bumpy paddles give it the name "Road Kill Cactus" for obvious reasons. It even looks like it has tire tracks across it.
Drought tolerant but best with deep irrigation every week or so in summer. It can take more frequent watering in quick draining soils.
Most cacti and succulents don't need a specific blend. They grow healthy and happy when fed with a highly diluted all-purpose fertilizer. However, a low-nitrogen content, water-soluble fertilizer is best suited for the job. Use a 5-10-10 blend or 10-10-10 fertilizer diluted to 1/4th strength.