Gymnocalycium mihanovichii "Crested"
Posted by Grace on August 31, 2025
Gymnocalycium mihanovichii "Crested"
Quick Facts
- Native Habitat: South America (primarily Paraguay, Argentina, and Bolivia)
- Family: Cactaceae
- Water: Minimal; allow soil to fully dry between waterings
- Sunlight: Bright, indirect light or filtered sun
- Soil: Well-draining cactus mix with added grit or perlite
Why it is called Gymnocalycium mihanovichii 'Crested'?
The name Gymnocalycium mihanovichii refers to its genus (Gymnocalycium, meaning "naked calyx") and species, which honors the botanist J. Mihanovich. The term “crested” describes a rare growth mutation in which the cactus’s apical meristem (growth point) elongates into a fan shape rather than forming the usual rounded body. This unusual, sculptural growth makes it highly prized among collectors.
Gymnocalycium mihanovichii "Crested"
The Appearance of Gymnocalycium mihanovichii 'Crested'
Leaves
As a cactus, it has no true leaves. Instead, it has ribbed, fan-shaped stems that twist and undulate, forming intricate crests. The skin is smooth and often green, purple, or even reddish depending on sun exposure.
Gymnocalycium mihanovichii "Crested"
Flowers
This cactus produces small, funnel-shaped blooms—usually pink, pale purple, or yellow—during the summer. The flowers emerge along the crest or at random points on the ridges, adding a delicate contrast to its bold form.
How to Care for Gymnocalycium mihanovichii 'Crested'
Light
Provide bright but indirect sunlight. Direct, harsh afternoon rays can scorch the plant, but too little light causes weak, stretched growth. A south- or east-facing window with sheer curtains works best.
Watering
Water sparingly. Let the soil dry out completely before watering again. In winter, water even less, only when the plant begins to slightly wrinkle. Overwatering is the most common cause of root rot.
Soil
Use a cactus or succulent soil mix with added perlite, pumice, or coarse sand for improved drainage. Avoid heavy or compacted soils.
Temperature
Thrives between 65–85°F (18–29°C). Protect from frost—temperatures below 50°F (10°C) can damage the plant.
Humidity
Prefers low humidity, similar to its native arid environments. Avoid placing it in bathrooms or terrariums with stagnant, moist air.
Fertilizing
Feed with a diluted cactus fertilizer during the growing season (spring to early fall) about once a month. Do not fertilize in winter.
Pruning
Pruning is rarely required, except to remove dried flowers or damaged tissue. Handle carefully to avoid harming the crest.
Repotting
Repot every 2–3 years, or when the plant outgrows its container. Use a shallow pot with a drainage hole. Allow roots to dry for a day before repotting to prevent rot.
Dormancy
In winter, the plant slows its growth. Reduce watering and withhold fertilizer during this period to mimic its natural rest cycle.
Pests and Diseases
Watch out for mealybugs, scale, and spider mites. Treat infestations promptly with isopropyl alcohol swabs or an insecticidal soap. Root rot is a risk if overwatered or planted in poorly draining soil.
Is Gymnocalycium mihanovichii 'Crested' Toxic to Pets?
No. Like most cacti, it is considered non-toxic to cats, dogs, and humans. However, its spines can cause physical injury if touched or chewed.
How to Propagate Gymnocalycium mihanovichii 'Crested'
Propagation is usually done by cutting and grafting. Since crested forms are unstable on their own roots, they are often grafted onto hardy rootstock like Hylocereus or Trichocereus.
- Use a sterile knife to remove a healthy crest section.
- Place the cutting on a compatible cactus rootstock and secure it with rubber bands.
- Keep in a bright, dry location until the graft takes and new growth appears.
Where Can I Buy Gymnocalycium mihanovichii 'Crested'?
These rare cacti can be found at specialty succulent nurseries, cactus shows, online plant shops, or auction sites like Etsy and eBay. Prices vary widely depending on size and shape of the crest.
FAQ
Q: Why is my crested Gymnocalycium reverting to normal growth?
A: Crested cacti sometimes grow regular, round stems. You can prune these off to encourage more crested growth.
Q: How big does it get?
A: Typically 3–6 inches tall and up to 8 inches wide, depending on growth conditions and grafting.
Q: Can I grow it from seed?
A: While you can grow standard Gymnocalycium mihanovichii from seed, crested forms rarely grow true from seed and must be propagated by grafting.
Q: How long does it live?
A: With proper care, these cacti can live for decades, especially when grafted to vigorous rootstock.
