Moon Cactus (Gymnocalycium) Care Essentials

Quick-Reference Care Card

• Light: Full sun to bright indirect
• Water: Drench, then dry completely
• Humidity: Average home
• Temperature: House to cool (50°F+)
• Fertilizer: High phosphorus (bloom formula)
• Soil: Cactus mix
• Propagation: Grafting only (it's a grafted plant)
• Use: Tabletop/decorative
• Difficulty: Easy

Critical Note

Moon cactus is two plants grafted together: colorful top (mutant Gymnocalycium) on green rootstock (Hylocereus). The top cannot survive alone—it lacks chlorophyll. If the top detaches, it must be re-grafted.

Enjoy your first cactus! It's a perfect beginner plant.