Light
Direct Sun
Requires full, direct sunlight to maintain its compact growth and produce flowers.
Reference image Echinopsis cinnabarina
Cinnabar Cactus
Overview
Echinopsis cinnabarina is a highly sought-after, flattened-globose cactus species famous for its stunning, vibrant scarlet flowers 1. Growing primarily as a solitary succulent subshrub, it is highly valued by growers for its compact size and prolific seasonal blooms.
Taxonomy and naming
Belonging to the Cactaceae family, this species is frequently classified under its synonym Lobivia cinnabarina. The specific epithet cinnabarina is derived from the bright red pigment cinnabar, directly referencing the intense color of its showy blossoms 2.
Distribution and habitat
This species is native to the high-altitude regions of the Bolivian Andes, typically growing at elevations between 2,500 and 4,000 meters above sea level 1. In these mountainous habitats, it thrives on rocky slopes and dry grasslands, adapted to intense solar radiation and sharp temperature drops.
Appearance
The stem is dark green, flattened-globose, and can reach up to 15 cm in diameter. It features spiraled, pronounced ribs adorned with clusters of curved, greyish-to-brownish spines. The magnificent, cup-shaped flowers emerge from the crown, displaying brilliant shades of cinnabar-red or orange-red.
Cultivation and care
Maximum sunlight is crucial for maintaining its compact shape and encouraging healthy bud development 2. Water thoroughly during the active spring and summer growing seasons, but only after the potting medium has dried completely. During winter dormancy, keep the plant dry and cool.
Common cultivation mistakes
Overwatering in poorly draining soil or placing the plant in low-light conditions are the most common errors. This quickly leads to root rot or etiolation, causing the cactus to stretch and weaken.
References
Watering
10-30 Days
Allow the soil to dry out completely between waterings. Suspend watering during winter.
Soil
Fast-draining, mineral-rich cactus mix with pumice and coarse sand
Highly porous mineral substrate containing pumice, gravel, and minimal organic matter.
Safety
Pet Friendly
The sharp spines can cause skin irritation. Keep out of reach of pets and children.
Difficulty
Easy
Very easy to care for as long as overwatering and low-light conditions are avoided.
Native Habitat
Bolivia
Naturally occurs in the high-elevation rocky grasslands of the Andean slopes under intense sunlight and cool nights.
Frequently Asked Questions
How often should I water my Cinnabar Cactus?
Water deeply in summer only when the soil is completely dry (approx. every 10 days). In winter, withhold water entirely to prevent root rot in cold temperatures.
Is Echinopsis cinnabarina toxic to pets?
It is non-toxic chemically, but its sharp spines pose a physical injury hazard to curious pets.
How can I encourage my cactus to bloom?
To trigger spring blooms, provide a cold and dry winter dormancy period at 5-10°C, followed by plenty of direct sunlight during the summer.
Which type of pot should I choose?
Terracotta or clay pots with adequate drainage holes at the bottom are ideal as they allow excess moisture to evaporate quickly.
Can this cactus be grown indoors?
Yes, but it must be placed directly on a south- or west-facing windowsill that receives full, direct sunlight throughout the day.
Is Echinopsis cinnabarina cold hardy?
It can tolerate brief light frosts down to -5°C if the soil is kept completely dry, but it is best moved indoors in frost-prone areas.
Why is my cactus stretching and losing its round shape?
This stretching (etiolation) is a clear sign of light deprivation. Move your cactus immediately to a brighter spot with direct sunlight.
When should I repot the plant?
Repot every 2 to 3 years in early spring, moving it to a slightly larger pot filled with fresh, highly draining cactus soil.
What is its growth rate?
It has a slow to moderate growth rate. Over the years, it slowly expands while maintaining its attractive, flattened-globular shape.
What color are the flowers and how long do they last?
The flowers are intense cinnabar-red or orange-red. Individual flowers typically last 1-2 days, but the plant can produce successive blooms.