Gymnocalycium mihanovichii: How to Grow and Care for Moon Cactus

Gymnocalycium mihanovichii Moon Cactus

Scientific name: Gymnocalycium mihanovichii

Common name: Moon Cactus

This cute cactus is a combination of two cacti, Gymnocalycium and Hylocereus. The term “moon cactus” usually refers to the yellow and orange varieties, however red varieties can be included.

Quick Look at Gymnocalycium mihanovichii

  • Partial sun to partial shade
  • Typical water needs for a succulent
  • Plant grows up to 12″ (30.5 cm) tall
  • Zone 10a (Minimum 30° F | -1.1° C)
  • Not cold hardy
  • Propagation by grafting and offsets
  • Generally non-toxic to humans and animals
  • Actively grows in the Summer

General Care for Gymnocalycium mihanovichii “Moon Cactus”

Gymnocalycium mihanovichii is a great cacti for beginners. It thrives on neglect and thrives indoors. It is actually two cacti that have been fused together. The cacti that come from Gymnocalycium are the same cacti that come from another cacti. The Gymnocalycium is a Mutant, unable to photosynthesize, and therefore requires food from another cacti.


The watering needs for a succulent are typical. The “soak and dry” method will allow the soil to dry out completely between waterings.

Where to Plant

If you live in a zone that gets colder than 30 F, it’s best to plant the moon cacti in a container that can be brought indoors. It does well in both full and partial sun. The area of your garden that gets partial sun and shade is where to plant. If planting indoors, place in a room that gets some sun and light.

How to Propagate Gymnocalycium mihanovichii “Moon Cactus”

Gymnocalycium Mihanovichii “Moon Cactus” will not produce offsets. Those that do can be traced back to the offsets. You can try to extend the life of yourMoon Cactus by using a new rootstock.


There will be small offsets from the top of the plant. Allow the offsets to dry for one to two days before placing them in well-draining soil.


  1. Gymnocalycium mihanovichii (Moon Cactus) – Wikipedia

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