Light
Full Sun
Requires full sun. Place in the brightest possible spot, ideally receiving 6+ hours of direct sunlight daily.
Reference image 
Reference image Cylindropuntia sanfelipensis
San Felipe Cholla
Overview
Cylindropuntia sanfelipensis, commonly known as the San Felipe Cholla, is a highly drought-tolerant, spiny succulent shrub belonging to the Cactaceae family. It is well-adapted to surviving the harsh conditions of extremely arid desert regions 1.
Taxonomy and Naming
This species was formally described by botanist Jon P. Rebman 2. The genus Cylindropuntia is characterized by cylindrical stem segments, distinguishing it from the flat-jointed Opuntia species. The specific epithet 'sanfelipensis' refers to its native occurrence near San Felipe in Baja California 1.
Distribution and Habitat
San Felipe Cholla is endemic to the northeastern desert regions of Baja California, Mexico 2. It populates gravelly slopes, sandy desert flats, and alluvial fans within extremely dry desert shrublands 3.
Appearance
It forms a heavily branched, shrubby mound. The stem segments are cylindrical, grayish-green, and densely armed with sharp, sheathed spines that vary from golden-yellow to silvery-white 1. The flowers, which bloom in spring, range in color from pale yellow to brownish-bronze.
Cultivation
In cultivation, this plant requires maximum direct sunlight and exceptionally well-draining mineral soil. It is susceptible to frost damage in wet conditions, so winter watering must be avoided entirely to prevent root rot 3.
Common Care Mistakes
The most frequent issue is overwatering coupled with poorly drained soil, which quickly leads to root and stem rot. Insufficient sunlight will cause the stems to stretch, weaken, and lose their dense spine coverage 1.
References
Watering
12-30 Days
Water deeply only when the soil is completely dry. Suspend watering almost entirely in winter.
Soil
Well-drained, coarse sandy and gravelly mineral cactus soil
Use a strictly mineral mix containing pumice, gravel, and coarse sand with very little organic matter.
Safety
Risky for Pets
Highly dangerous due to sharp, barbed spines (glochids) that attach easily to skin. Keep away from pets and children.
Difficulty
Moderate
Moderate. Physically difficult to handle due to spines, but horticulturally very resilient and low-maintenance.
Native Habitat
Mexico (Baja California)
Endemic to the arid desert regions of northeastern Baja California, Mexico, thriving in sandy flats and rocky slopes near the Gulf of California.
Frequently Asked Questions
Can San Felipe Cholla be grown indoors?
It is difficult due to its high light requirements. However, it can survive indoors if placed on south-facing windowsills that receive full direct sun all day.
How often should I water this cactus?
In summer, water only when the soil is dry (about every 10-12 days). In winter, suspend watering almost completely to prevent rotting in cold temperatures.
Is it harmful to pets?
Yes, while not chemically toxic, its sharp, barbed spines (glochids) easily lodge into paws and mouths, causing severe mechanical injury and irritation.
What kind of soil does it need?
Use a highly porous, mineral-based soil. Mix commercial cactus soil with plenty of pumice, lava rock, and coarse sand to ensure fast drainage.
When does the San Felipe Cholla bloom?
When provided with enough direct sun and maturity, it produces yellow-to-bronze flowers typically from mid-spring to early summer.
How fast does it grow?
It has a moderate growth rate compared to other desert cacti, producing new cylindrical stem joints annually under warm, sunny conditions.
What should I do if I get pricked by its spines?
Remove larger spines carefully with tweezers. For tiny hair-like glochids, apply sticky tape or wax to the skin and gently peel it off to pull them out.
When should I repot this plant?
Repotting is typically done every 2-3 years in early spring. The best time is when the root system has fully occupied the current pot.
Is it cold hardy?
It can tolerate brief, light frosts down to -5°C (23°F) if kept completely dry. In colder zones, bring it indoors for the winter.
How do you propagate it?
Detach a stem segment with a clean, sharp tool. Let the cut callus over for about a week, then plant it in dry, sandy soil until roots develop.