Argentine Giant Cactus (Echinopsis candicans) 
The Argentine Giant Cactus is a stunning and imposing cactus known for its impressive size and beautiful blooms. It’s a great addition to any desert or xeriscape garden.
Light: Full sun. This cactus thrives in bright, direct sunlight. It needs at least 6 hours of direct sunlight daily to maintain its health and encourage flowering.
Water: Low. Water sparingly, allowing the soil to dry out completely between waterings. Overwatering can lead to root rot. During the growing season (spring and summer), water once every 2-3 weeks. Reduce watering in the fall and winter