Light
Direct Sun
Requires at least 6 hours of direct sunlight daily to maintain compact growth and dense spination.
Reference image 
Reference image Coryphantha pseudonickelsiae
False Nickels' Beehive Cactus
Overview
Coryphantha pseudonickelsiae is a rare, globose to slightly cylindrical succulent cactus species belonging to the Cactaceae family 1.
Classification and naming
The species name reflects its close morphological resemblance to Coryphantha nickelsiae, yet it remains distinct due to subtle differences in tubercle structure and spine configuration 1.
Distribution and habitat
Native to northern Mexico, specifically Chihuahua, Coahuila, and Durango, it thrives in arid desert environments, stony hillsides, and limestone crevices 2.
Appearance
It features a dark green stem covered in prominent conical tubercles. The areoles bear stiff, grayish-brown radial spines. In summer, it produces beautiful, bright yellow funnel-shaped flowers at the apex 1.
Cultivation and care
This species requires excellent drainage and mineral-based soils. Watering should be deep but infrequent, allowing the substrate to dry out fully. Keep completely dry in winter 2.
Common cultivation mistakes
Overwatering, especially during winter dormancy, and inadequate sunlight are the primary causes of root rot and etiolation.
References
Watering
10-45 Days
Water thoroughly only when the soil is completely dry. Keep dry in winter.
Soil
Well-draining, mineral-rich, sandy and pumice-based cactus mix
Highly mineral substrate with coarse sand, pumice, and grit, low in organic matter.
Safety
Pet Friendly
Non-toxic, but sharp spines can cause physical injury; handle with care.
Difficulty
Moderate
Moderate; easy if watering is strictly controlled, but highly susceptible to rot if overwatered.
Native Habitat
Mexico (Chihuahua, Coahuila, Durango)
Inhabits the dry limestone slopes and gravelly desert plains of Northern Mexico, perfectly adapted to intense solar radiation and minimal rainfall.
Frequently Asked Questions
How often should I water Coryphantha pseudonickelsiae?
Water thoroughly in summer only when the soil is bone dry (about every 10 days). In winter, suspend watering completely.
Is it toxic to pets?
No, it is non-toxic. However, its sharp spines can cause physical injury to curious pets.
What kind of soil should I use?
Choose a highly porous mineral mix containing pumice, grit, and coarse sand, with very low organic content.
When does it bloom and what color are the flowers?
It blooms in summer, producing large, bright yellow flowers at the top of the stem.
Is it cold hardy?
It can tolerate brief drops down to -5°C (23°F) if kept completely dry, but it is best protected from frost.
How fast does it grow?
It is a slow-growing cactus, taking several years to reach mature size.
When should I repot it?
Due to its slow growth, repotting every 2-3 years in early spring is sufficient.
Can it get sunburned?
It loves direct sun, but sudden exposure to intense light after being in shade can cause permanent sunburn scars.
What fertilizer should I use?
Apply a low-nitrogen, high-potassium cactus fertilizer diluted to half strength 1-2 times during spring and summer.
Can it be propagated from seed?
Yes, it propagates easily from seeds sown in spring, though the germination and growth process requires patience.