Ruby ball cactus

Ruby ball cactus Gymnocalycium mihanovichii

What is the plant

Gymnocalycium mihanovichii is a species of cactus from South America. The most popular cultivars are varied mutants which completely lack chlorophyll, exposing the red, orange, or yellow pigmentation. The plant is called a "Moon Cactus".

The ruby ball cactus, also known as the red cap cactus, is a grafted specimen. The colorful red top is a gymnocalycium, which refers to the flower buds bearing no hair or spines. While the lower green cactus could be any number of varieties (usually a Hylocereus cactus). The main job of the lower cactus is to display the gymnocalycium at an advantageous height. The ruby ball is an albino plant, which means it has no chlorophyll. Therefore, it relies on the rootstock cactus as a food source. It has a parasitic relationship. If there is a disconnect between the requirements of cactus on the bottom and the scion on top, one or both may die.

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Humidity

Dry

Lighting

Full Sun

Temperature

5°C - 30°C

Hardiness zone

9b - 11b

Difficulty

Easy

Water
In the growing season, the plants should be watered at least once a week. When watering, the soil should be given a good soaking, allowing excess water to drain away. Allow the compost to dry out slightly between each watering.
Sunlight
Cacti and succulents thrive with good light sources, and it is best to place cacti and succulents in a bright place. A south facing position will provide good sunlight. However, be careful to not put them in direct sunlight because the intense light can make the plants turn a yellow colour.
Fertilizer
An organic, balanced, liquid fertilizer once a month during growth period is recommended.

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Soil
Cacti require a porous, sandy or pebbly potting soil that provides plenty of aeration and excellent drainage. A good cactus potting mixture will also consist of some organic material that makes moisture available to the plant roots when watered but then dries out quickly.
Pruning
Any dying or yellowing leaves can be removed for aesthetic reasons.
Temperature
Indoor temperatures suit just fine during the summer, but it prefers cool night temperatures during the winter, between 40 and 60°F (5 and 15°C), if you can manage it.

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Container
Many seasoned gardeners recommend using a container that is about 10% larger in diameter than the cactus plant at its widest point.
Popularity
661 people already have this plant 210 people have added this plant to their wishlists