Light
Bright Indirect Light
Provide bright, indirect or filtered sunlight. Avoid harsh direct midday sun which can scorch the stems.
Reference image Deamia funis
Overview
Deamia funis is an intriguing, climbing and epiphytic member of the family Cactaceae. Unlike typical desert cacti, this species has adapted to climb up tree trunks or rocky cliffs in tropical forests. Its specific epithet 'funis' translates from Latin as 'rope', referencing its slender, elongated, rope-like stem structure 1. It is highly suited for hanging baskets or vertical trellises in cultivation.
Taxonomy and Naming
The genus Deamia has long been entangled with Selenicereus and Strophocactus 2. Today, Deamia funis is recognized as a distinct species based on its unique vegetative morphology and floral anatomy. Historical synonyms occasionally link it to older night-blooming cereus classifications.
Distribution and Habitat
Native to Central America—specifically Nicaragua—and parts of northern South America, Deamia funis thrives in seasonally dry tropical biomes 1. It grows as a hemi-epiphyte or lithophyte, receiving high filtered light and seasonal rainfall under the forest canopy.
Appearance
The stems are green, ribbed, and develop numerous aerial roots along their length to aid in climbing. It produces spectacular, large, nocturnal flowers that are white to cream-colored and intensely fragrant, adapted to attract nocturnal pollinators like moths 2.
Cultivation
In cultivation, Deamia funis requires conditions similar to tropical epiphytes rather than desert cacti. It prefers high ambient humidity, bright indirect light, and a porous medium 1. Temperatures should ideally remain warm, with a strict minimum of 10°C during winter dormancy.
Common Cultivation Mistakes
The most frequent errors include treating it as an arid desert cactus, resulting in severe dehydration, or planting it in heavy clay soil that suffocates the roots 2. Insufficient humidity may also prevent the development of healthy aerial roots.
References
Watering
6-20 Days
Water thoroughly once the topsoil feels dry. Reduce watering significantly in winter.
Soil
Well-draining, organically rich, airy cactus and epiphyte mix
An airy blend of cactus soil, perlite, and fine orchid bark works best.
Safety
Pet Friendly
Non-toxic, but the small spines can cause mechanical irritation; handle with gloves and keep away from pets.
Difficulty
Moderate
Moderate. Easy if humidity and warmth are maintained, but susceptible to frost and waterlogging.
Native Habitat
Nicaragua, Central America, South America
Mainly distributed across the seasonally dry tropical forests of Nicaragua and adjacent regions in Central and Northern South America, growing as an epiphyte on trees and cliffs.
Frequently Asked Questions
Can Deamia funis be grown indoors?
Yes, it thrives indoors in bright, indirect light, especially when grown in hanging baskets or with climbing support.
How often should it be watered?
Water when the topsoil dries out in summer (about every 6 days), and reduce significantly to once every 20 days during winter dormancy.
What type of soil does it prefer?
It prefers a well-drained epiphyte mix made by adding perlite and pine bark to standard cactus soil.
Does Deamia funis bloom?
Yes, mature plants produce very large, fragrant, white flowers that open at night.
Is it toxic to pets?
It is non-toxic, but its small spines can cause physical irritation to pets' mouths and paws.
What is its growth rate?
Under proper warmth and humidity, it exhibits a moderate to fast growth rate, producing long climbing stems.
What are the aerial roots for?
In nature, these roots help it cling to trees. Indoors, they absorb moisture from the air and help it climb moss poles.
Is it cold hardy?
No, being a tropical species, it is sensitive to temperatures below 10°C and must be kept indoors during winter.
Why are the stems shriveling?
This is usually caused by severe underwatering or root rot, which prevents the plant from absorbing water.
How do you propagate it?
It is easily propagated by taking stem cuttings in spring or summer, letting them callous for a few days, and planting them in well-draining soil.