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Gymnocalycium mihanovichii

Gymnocalycium mihanovichii – Unique Cactus Care Guide


Gymnocalycium mihanovichii (Fric and Gürke) Britton and Rose, commonly known as the Moon Cactus when grafted, is a striking species recognized for its distinctive globular shape and smooth, ribbed surface. Native to South America, particularly Paraguay and Argentina, this slow-growing cactus thrives in bright light and minimal watering conditions. Its ability to adapt to different growing environments makes it a great choice for both beginners and experienced collectors.



Why Grow Gymnocalycium mihanovichii?


  • Compact and unique: Small, round body with smooth ribs and short spines.
  • Color variations: Some cultivated forms display vibrant hues when grafted.
  • Easy to maintain: Requires little water and minimal care.


Essential Growth Information


  • Native Habitat: Found in dry, rocky areas of Paraguay and Argentina.
  • Size and Growth: Typically grows up to 5 cm in diameter with a slow growth rate.
  • Growth Habit: Small, rounded, non-climbing cactus with moderate spines.
  • Toxicity: Non-toxic to humans and pets.


How to Care for Gymnocalycium mihanovichii


  • Best Placement: Prefers a bright windowsill or sunny location.
  • Light Requirements: Thrives in bright, indirect sunlight; too much direct sun may cause scorching.
  • Watering Routine: Water sparingly, allowing the soil to dry completely between waterings.
  • Humidity Needs: Tolerates dry air; no need for additional humidity.
  • Ideal Temperature: Prefers temperatures between 18°C-30°C; protect from frost.
  • Soil Mix: Well-draining cactus mix with added sand or perlite.
  • Repotting Tips: Repot every 2-3 years to refresh soil and provide space for growth.
  • Fertilizing: Apply a diluted cactus fertilizer once in spring and summer.
  • Propagation: Can be grown from offsets or seeds.
  • Hydroponic Suitability: Not suitable for hydroponic growth.
  • Pruning Advice: Minimal pruning needed; remove any dead or rotting tissue.


Common Issues and Solutions


  • Pests: Watch for mealybugs; treat with neem oil, or use beneficial insects or insecticidal soap.
  • Root Rot: Prevent by ensuring proper drainage and avoiding excessive watering.
  • Yellowing Body: May indicate overwatering or lack of sunlight.


Additional Care Insights

This species thrives best when allowed to experience natural temperature fluctuations, mimicking its native habitat. Avoid overwatering and provide well-draining soil to maintain healthy growth.



Name and Botanical Origins

The genus Gymnocalycium comes from Greek, meaning "naked calyx," referring to its flower structure. The species name mihanovichii honors the botanist Mihanovich.



Frequently Asked Questions


  • Does Gymnocalycium mihanovichii flower? Yes, it produces small pink or yellow flowers in optimal conditions.
  • Can it survive in low light? It prefers bright conditions but can tolerate partial shade.
  • How often should I water it? Only when the soil is fully dry, typically every few weeks.

Order Gymnocalycium mihanovichii today and add this compact, low-maintenance cactus to your collection!

Gymnocalycium mihanovichii

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  • Gymnocalycium mihanovichii is approximately 12 cm tall and comes in a ø10.5 cm pot.

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