Light
Bright Indirect Light
Requires bright, filtered light. Avoid direct midday sun, which can bleach and burn the foliage.
Reference image Disocactus anguliger
Fishbone Cactus
Overview
Disocactus anguliger, commonly referred to as the 'Fishbone Cactus' or 'Zigzag Cactus', is an epiphytic cactus species belonging to the family Cactaceae. Known for its distinctive, deeply lobed zigzag stems and nocturnal, highly fragrant flowers, it is a highly prized ornamental plant.
Taxonomy and Naming
Originally described by Charles Lemaire in 1851 as Phyllocactus anguliger, the species was later classified under the genus Disocactus following modern molecular and morphological studies 1. It is often found in older literature and trade under the synonym Epiphyllum anguliger.
Distribution and Habitat
Endemic to Mexico, this species occurs in the states of Guerrero, Jalisco, Michoacán, Nayarit, and Oaxaca 2. It grows as an epiphyte in seasonally dry tropical forests, evergreen pine-oak forests, and cloud forests at elevations of 1,100 to 1,800 meters above sea level, anchoring itself to trees and rocky cliffs.
Appearance
The plant produces heavily branched, arching, spineless green stems. While the basal stems are cylindrical, the secondary branches are flattened and deeply notched in an alternating pattern, resembling a fishbone. The nocturnal blooms appear in late autumn; they are large, cream-white to pale yellow, and emit a sweet, intense fragrance. These are followed by small, greenish, edible ovoid fruits.
Cultivation
Unlike desert cacti, Disocactus anguliger requires bright, indirect light and higher ambient humidity. The growing medium should be well-draining, rich in organic matter, and aerated—similar to an orchid or bromeliad mix. Frequent watering is tolerated during the active summer growth, but the substrate must dry out partially between waterings.
Common Mistakes
Exposure to intense, direct afternoon sun causes unsightly leaf scorch. Overwatering and poor drainage are the primary causes of root rot. Lack of winter rest can prevent the plant from blooming.
References
Watering
6-14 Days
Water once the top soil feels dry during summer. Drastically reduce watering in the winter months.
Soil
Slightly acidic, organic-rich, well-draining cactus or orchid soil mix
Prefers a chunky, well-aerated organic mix of cactus soil, orchid bark, and perlite.
Safety
Pet Friendly
Non-toxic to cats, dogs, and humans, making it a very safe household plant choice.
Difficulty
Easy
Very easy to care for, thriving in standard home temperatures and moderate humidity.
Native Habitat
Mexico
Native to the mountain regions of southern and western Mexico, growing on tree trunks in warm, seasonally dry tropical forests.
Frequently Asked Questions
Is the Fishbone Cactus toxic to pets?
No, *Disocactus anguliger* is completely **non-toxic** to cats and dogs. It is safe to grow in pet-friendly homes.
How often should I water my Fishbone Cactus?
Water when the top few inches of soil dry out, roughly every 6 days in summer. In winter, reduce watering to once every 14 days.
What kind of soil does a Fishbone Cactus need?
As an epiphyte, it prefers an airy, well-draining mixture of standard cactus soil, orchid bark, and plenty of perlite.
Why are the zigzag stems on my plant wrinkling?
Wrinkling is usually caused by underwatering or extremely dry air. Check the soil moisture, water if dry, and increase local humidity.
How do I get my Fishbone Cactus to flower?
To encourage autumn blooming, ensure it gets bright indirect light in summer and experience slightly cooler temperatures during winter rest.
Can the Fishbone Cactus take direct sunlight?
Gentle morning sun is beneficial, but harsh afternoon direct sunlight will burn the stems, leaving permanent yellow or brown scars.
Why are my plant's stems growing very thin and straight?
If new growth is thin, pale, and lacks the zigzag pattern, the plant is not getting enough light. Move it to a brighter location.
How can I propagate my Fishbone Cactus?
Take a healthy stem cutting, let the cut end callus over for 2-3 days, then insert it directly into moist, well-draining cactus mix.
Does the Fishbone Cactus grow fast?
Yes, compared to desert cacti, it is a relatively fast grower when provided with adequate humidity, warmth, and bright indirect light.
Is the Fishbone Cactus cold hardy?
No, being a tropical species, it cannot tolerate frost. Keep it in temperatures above 10°C (50°F) to prevent damage.