Light
Full Sun
Requires full sun, ideally 6 to 8 hours of direct sunlight daily for robust growth.
Reference image 
Reference image Cylindropuntia × vivipara
Viviparous Cholla
Overview
Cylindropuntia × vivipara is a naturally occurring hybrid succulent shrub in the Cactaceae (cactus) family. It is renowned for its exceptional adaptation to harsh, arid desert conditions 1.
Taxonomy and Naming
This cactus is scientifically recognized as a natural hybrid between Cylindropuntia arbuscula and Cylindropuntia versicolor 2. The '×' symbol in its botanical name denotes its hybrid lineage, while 'vivipara' refers to its tendency to produce viviparous growths, where fallen stems or fruits readily root to clone the parent plant.
Native Range and Habitat
The hybrid is primarily native to the southwestern United States, particularly Arizona, extending into adjacent arid regions of northern Mexico. It thrives in desert habitats, sandy plains, and dry shrublands of the Sonoran Desert 1.
Appearance
It exhibits a shrubby, upright growth habit with cylindrical, jointed stem segments. The stems are green to grayish-green, covered in areoles bearing sharp spines and tiny, irritating glochids. Flowers range from yellow to bronze-red, often producing persistent fruits that can form chains.
Cultivation and Care
In cultivation, it requires full sun exposure and extremely well-draining, gravelly soil. Water should be applied only when the substrate is completely dry. During winter, watering must be suspended almost entirely to prevent root rot.
Common Cultivation Mistakes
The most frequent issues arise from overwatering, leading to fungal pathogens and root rot. Insufficient sunlight will cause weak, etiolated growth, compromising the plant's structural integrity.
References
Watering
14-45 Days
Water thoroughly only when the soil is completely dry. Keep nearly bone dry throughout the winter.
Soil
Highly drained, sandy, gravelly, and loamy cactus potting mix
Use a specialized mineral-rich cactus mix with plenty of coarse sand, pumice, or perlite.
Safety
Risky for Pets
Warning! Possesses sharp spines and irritating glochids that easily dislodge. Highly toxic/dangerous to pets.
Difficulty
Moderate
Moderate. Easy if provided with enough sunlight and very dry conditions, but prone to rot if overwatered.
Native Habitat
Southwestern USA, Arizona, Northern America
Natively occurs across the Sonoran Desert plains and dry slopes of southern Arizona and neighboring Mexican states.
Frequently Asked Questions
Can Cylindropuntia × vivipara be grown indoors?
Yes, but it requires **extremely high direct sunlight**. A south-facing window that receives intense sun is highly recommended.
How often should I water this cactus?
Water about **every 14 days** in summer (only after the soil is completely dry). In winter, reduce watering to once every **45 days** or less.
What type of soil does it need?
It needs fast-draining, gritty soil rich in **coarse sand, gravel, and pumice**. Standard potting soils will trap moisture and cause rot.
Is Cylindropuntia × vivipara dangerous to pets?
Yes, the plant's **microscopic glochids** and large spines can easily lodge in pets' mouths, eyes, and paws, causing severe irritation.
When should I repot this plant?
Generally **every 2-3 years in early spring**. Always use thick protective leather gloves or tongs to handle the plant during repotting.
How much cold can this cactus tolerate?
It can tolerate brief, light frosts down to **-10°C (14°F)**, provided it is kept completely dry. Cold and wet conditions will quickly kill it.
How do I encourage it to bloom?
Provide ample **direct sunlight** during summer, and let the plant rest in a cool (10-15°C) and completely dry environment during winter.
What is its growth rate?
It grows at a **moderate rate** under optimal sun and watering. Over time, it branches out to form a shrubby structure.
My cactus is getting soft, what could be the reason?
Softening or blackening of the stems is usually a sign of **root rot caused by overwatering**. Stop watering immediately.
How can it be propagated?
It is easily propagated by taking **stem cuttings (segments)**, letting them dry for a few days to callous, and then planting them in sandy soil.