Triangle cactus is a genus of cacti that requires minimum care, thriving in full sun, heat, and drier conditions. Basic care involves sunny exposure, well-draining soil and minimal watering. Its challenges often include mealybugs and scale insects, fungus due to overwatering, and sensitivity to frost. Seasonally, the plant demands less water in winter but requires shielding from cold. These varied requirements underline triangle cactus' reputation as durable, yet graceful garden additions.