Gymnocalycium mihanovichii, often called the Moon Cactus, is a small, globular cactus prized for its brightly colored, grafted tops in shades of red, yellow, or orange. Native to South America, it is a slow-growing, low-maintenance plant that adds a vibrant pop of color to any indoor collection.
Full Botanical Name: Gymnocalycium mihanovichii
Common Names: Moon Cactus
Country and/or Region of Origin: South America (Paraguay, Argentina)
Growing Conditions in Native Habitat: Grows in arid to semi-arid regions with rocky soil and strong sunlight
Care Guide
Care Guide:
Light: Bright, indirect light; avoid prolonged direct sun for grafted varieties to prevent burning
Ideal Room: Windowsills, desks, or small pots indoors with good light exposure
Feeding: Use a diluted cactus fertilizer once a month during growing season (spring and summer)
Humidity: Low humidity preferred; sensitive to overwatering
Ideal Temperature: 18–27°C (64–81°F); protect from temperatures below 10°C (50°F)
Watering: Water thoroughly when soil is dry; reduce watering in winter to prevent root rot
Pet/Child Safe: Non-toxic but spines can be sharp
Soil Type: Well-draining cactus or succulent mix
Propagation: Primarily via grafting; seed propagation possible but slow
Eventual Height and Spread: Typically 5–15 cm tall, up to 15 cm wide depending on grafted rootstock
Growth Rate: Slow-growing
Pests and Treatment: Mealybugs, spider mites; treat with insecticidal soap or neem oil
Repotting: Every 2–3 years or when root-bound
Pruning: Not usually required
Air Purification: Minimal
Folklore: Often symbolizes vibrancy and resilience, a cheerful addition to indoor spaces
