Light
Bright Indirect Light
Prefers bright, indirect light or filtered sun. Avoid prolonged scorching afternoon sun.
Reference image 
Reference image Acanthocereus cuixmalensis
Cuixmala Spiny Cereus
Overview
Acanthocereus cuixmalensis is a rare, scrambling succulent shrub belonging to the family Cactaceae 1. It is characterized by its slender, angular stems and nocturnal white blooms that rely on specific pollinators.
Taxonomy and Naming
Named after the Cuixmala Biosphere Reserve in Jalisco, Mexico, where it was first documented, this species belongs to the genus Acanthocereus, known for their sprawling, ribbed growth habits 1.
Distribution and Habitat
This species is endemic to Mexico, specifically along the Pacific slopes in Jalisco, Colima, Michoacán, Guerrero, and Oaxaca 2. It thrives in seasonally dry tropical forests and coastal scrub, growing in sandy or rocky soils.
Appearance
The stems are thin, green to grey-green, typically with 3 to 4 prominent ribs and small clusters of radial spines. In summer, it produces large, fragrant, white funnel-shaped flowers that open at night.
Cultivation and Care
In cultivation, it requires a well-draining cactus mix, bright filtered sunlight, and moderate watering. It has poor frost tolerance and must be kept above 10°C during winter.
Common Mistakes
Overwatering is the primary cause of root rot. Lack of sufficient light leads to weak, etiated stems that fail to support themselves.
References
Watering
10-30 Days
Allow the potting medium to dry out completely before watering. Avoid waterlogged soil.
Soil
Well-draining, pumice and sand-rich cactus potting mix
Requires highly porous, sandy, and well-drained soil formulated for cacti.
Safety
Contact/Ingestion Risk
Equipped with sharp, rigid spines. Keep out of reach of children and pets.
Difficulty
Moderate
Requires moderate care due to its sensitivity to frost, high humidity, and overwatering.
Native Habitat
Mexico (Pacific Coast)
Native to the coastal areas of western and southwestern Mexico, growing in dry tropical deciduous forests and coastal thorn scrubs in sandy, nutrient-poor substrates.
Frequently Asked Questions
Can Acanthocereus cuixmalensis be grown indoors?
Yes, but it must be placed near a bright south- or west-facing window with plenty of indirect light, and kept cool and dry during winter.
How often should this cactus be watered?
Water every 10 days in summer once the soil dries completely, and reduce to once a month during its winter dormancy.
What is the best soil mix for this plant?
A highly porous cactus mix amended with 50% pumice, perlite, or coarse sand is ideal to prevent root rot.
Is Acanthocereus cuixmalensis toxic to pets?
While its sap is not toxic, its sharp spines pose a physical hazard to curious pets and children.
Why are the stems growing very thin and weak?
This is due to insufficient light (etiolation). Gradually move your plant to a brighter location with more filtered sunlight.
When does it bloom and what are its flowers like?
It blooms in summer, producing large, fragrant white flowers that open at night and close by early morning.
Is using a support stake mandatory?
Since it is a scrambling cactus, using a bamboo stake or trellis is highly recommended to support its long, heavy stems.
What is its cold hardiness in winter?
It tolerates a minimum of 10°C (50°F). It is frost-sensitive and must be overwintered indoors in cold climates.
What is its growth rate?
Under optimal light and watering conditions, it has a moderate-to-fast growth rate compared to other cacti, producing long branches.
How often should it be repotted?
Repot every 2 years in early spring, or when the roots have completely filled the container, moving up only one pot size.