Light
Direct Sun
Requires full, direct sun; insufficient light leads to pale etiolation.
Reference image 
Reference image Coryphantha neglecta
Neglected Beehive Cactus
Overview
Coryphantha neglecta is a small, slow-growing globose cactus native to the arid expanses of Mexico. Known for its geometric tubercle arrangement and prominent spines, it is a prized species among cactus and succulent enthusiasts worldwide.
Taxonomy and Naming
Belonging to the family Cactaceae, the genus name Coryphantha is derived from the Greek words 'koryphe' (summit) and 'anthos' (flower), referring to the apical flowering habit. The specific epithet 'neglecta' translates to 'neglected', referencing the species' long history of being overlooked or misidentified as related taxa before receiving official recognition 1.
Distribution and Habitat
This species is primarily native to the Chihuahuan Desert and surrounding regions of northeastern Mexico, spanning states such as Coahuila, Nuevo León, and San Luis Potosí 2. It populates limestone hillsides, desert shrublands, and rocky slopes where drainage is immediate.
Appearance
The plant body is globose to shortly cylindrical, with prominent spiraled tubercles that feature a distinctive groove along their upper side. Radial and central spines are stout, grayish-yellow to dark brown at the tips. In summer, it produces showy, bright yellow funnelform flowers from the woolly stem apex.
Cultivation
In cultivation, Coryphantha neglecta demands maximum solar exposure and exceptional air circulation. It thrives in an exclusively mineral-based substrate consisting of pumice, gravel, and limestone grit. When kept completely dry during winter dormancy, it can withstand brief sub-zero temperatures 1.
Common Cultivation Mistakes
The most prevalent failure in growing this species is overwatering, particularly during the winter rest phase. Poorly drained, peat-heavy soils lead to rapid root rot. Lack of sufficient direct sunlight causes etiated, weak growth.
Bibliography
References
Watering
12-30 Days
Water only after the substrate is dry. Keep completely dry in winter.
Soil
Extremely well-drained, limestone and pumice-rich mineral cactus mix
Highly porous mineral mix with limestone grit and no organic peat.
Safety
Pet Friendly
Armed with sharp spines; keep out of reach of children and pets.
Difficulty
Moderate
Moderately easy if watering is strictly controlled and light is abundant.
Native Habitat
Mexico (Coahuila, Nuevo León, San Luis Potosí)
Inhabits Chihuahuan Desert shrublands, rocky slopes, and limestone deposits of northeastern Mexico under harsh, semi-arid climatic conditions.
Frequently Asked Questions
How often should I water Coryphantha neglecta?
During summer, water thoroughly only when the soil is completely dry (approx. every 10-12 days). In winter, suspend watering entirely to prevent root rot.
What soil mix is best for this cactus?
An almost purely mineral substrate composed of pumice, lava rock, coarse sand, and limestone grit with very little organic matter (10-20%) is ideal.
Is Coryphantha neglecta toxic to pets?
No, this cactus is non-toxic. However, its sharp, stiff spines present a physical hazard to curious pets and should be kept out of reach.
How much direct sunlight does this cactus need?
It requires at least 6 hours of direct sunlight daily. Insufficient light leads to weak, elongated growth (etiolation) and failure to bloom.
When does it bloom and what color are the flowers?
It blooms during summer, typically from June to August, producing large, vibrant yellow flowers from the woolly apex of the stem.
Is Coryphantha neglecta cold hardy?
It can tolerate brief drops down to -5°C (23°F) if kept completely dry, but it is best overwintered in a cool, dry room around 5-10°C.
What is the growth rate of this cactus?
It is a very slow-growing species. It takes several years from seed to reach a mature, flowering size.
How often should it be repotted?
Due to its slow growth, repotting is only necessary every 3-4 years in early spring, and only when the roots have fully filled the pot.
My cactus is yellowing or softening at the base, what should I do?
This is usually a sign of root rot from overwatering. Stop watering immediately, unpot the plant, and inspect the roots for decay.
Should I fertilize it during summer?
Yes, during the spring and summer active growth phases, apply a low-nitrogen, high-potassium cactus fertilizer diluted to 1/4 strength once a month.