Cleistocactus are desert cacti known for their tall, slender, and often spiny structures, requiring care reflective of their native arid environments. Basic care includes providing bright light, minimal water with well-draining soil, and maintaining warm temperatures. Common challenges encompass root rot from overwatering, pest infestations such as mealybugs, and sensitivity to cold temperatures. Seasonal considerations involve reduced watering in winter, protecting from frost, and allowing for a rest period to encourage spring flowering.