Light
Bright Indirect Light
Thrives in bright, filtered sunlight or partial shade during extreme summer heat.
Reference image Coryphantha wohlschlageri
Wohlschlager's Coryphantha
Overview
Coryphantha wohlschlageri is a small, globose to cylindrical cactus belonging to the family Cactaceae. This succulent subshrub is highly valued among collectors for its geometric tubercle arrangement and attractive, pale yellow flowers, reflecting its superb adaptation to harsh desert environments 1.
Classification and Naming
Within the genus Coryphantha, this species is classified under a group characterized by distinct grooved tubercles. The specific epithet honors a contributor to cactus taxonomy, identifying this taxon within the rich xerophytic flora of North America 12.
Origin and Habitat
Native to the arid and semi-arid desert regions of northern and central Mexico, specifically across states like San Luis Potosí, Zacatecas, and Tamaulipas. It thrives in gravelly, limestone-rich soils, often sheltered under nurse plants 2.
Appearance
The plant body is solitary or slowly offsetting, with well-defined spiraling tubercles. Areoles bear stiff, radiating spines and a central spine that protects the apex. During late spring to summer, funnelform yellow or cream flowers emerge from the woolly plant crown 1.
Cultivation
It prefers bright, indirect sunlight or filtered light. The potting medium must be highly porous, consisting of pumice, coarse sand, and minimal organic matter. Watering should be deep but infrequent, keeping the soil dry during winter dormancy 2.
Common Cultivation Errors
Overwatering and the use of heavy, clay-heavy soils are the primary causes of root rot. Inadequate light leads to etiolation (stretching), weakening the plant's spine formation and reducing its ability to bloom in summer.
Bibliography
References
Watering
10-30 Days
Allow soil to dry out completely between waterings. Keep completely dry in winter.
Soil
Well-draining, pumice and sand-rich cactus mineral mix
Prefers a highly mineral substrate with low organic content, such as pumice and coarse sand.
Safety
Pet Friendly
Non-toxic to pets, but sharp spines can cause physical injury. Handle with care.
Difficulty
Easy
Very easy if not overwatered; highly prone to rot in waterlogged conditions.
Native Habitat
Mexico (Central and Northern regions)
Endemic to the high-elevation arid plateaus and stony hillsides of central and northern Mexico, where it grows in limestone pockets surrounded by sparse desert scrub.
Frequently Asked Questions
Can Coryphantha wohlschlageri be grown indoors?
Yes, it can be grown successfully indoors on bright, south- or west-facing windowsills.
How often should I water this cactus?
In summer, water about every 10 days once the soil is dry; in winter, reduce watering to once a month or keep it dry.
What kind of soil does it need?
It needs a highly porous mineral mix containing pumice, lava rock, and minimal organic cactus soil.
Is it frost hardy in winter?
If kept completely dry, it can withstand brief temperatures down to -5°C, but protection from hard frost is recommended.
How do I encourage it to bloom?
Provide a cool, dry winter dormancy period and ensure it receives plenty of sunlight in spring and summer.
Is this cactus toxic to pets?
No, it is non-toxic, but its sharp spines pose a physical hazard to curious pets and children.
How fast does it grow?
Like most desert cacti, it is a very slow-growing species that tends to remain miniature.
When should I repot it?
Repot only when the roots fill the pot, typically every 2-3 years in early spring.
What are the most common pests and diseases?
Root rot caused by overwatering and mealybugs due to stagnant air are the most common issues.
What are its sunlight requirements?
It requires at least 5-6 hours of strong, filtered or indirect sunlight daily, protected from intense midday sun.