Light
Direct Sun
Requires at least 6 hours of direct sunlight daily.
Reference image 
Reference image Echinopsis haematantha
Blood-Red Flowered Hedgehog Cactus
Overview
Echinopsis haematantha is a remarkable, small-sized, semi-shrubby succulent cactus species belonging to the Cactaceae family. Known for its intensely colored, showy flowers and sturdy resilience, it has become a highly sought-after plant for succulent collectors and home gardeners worldwide 1.
Taxonomy and Naming
The genus name Echinopsis derives from the Greek "echinos" (meaning hedgehog or sea urchin) and "opsis" (appearance), pointing to the spiny, round shape of the stem. The specific epithet "haematantha" is Latin for "blood-red flowered", which directly highlights the brilliant, deep red color of its blossoms 2. Historically associated with the genus Lobivia, modern taxonomy places this species firmly under Echinopsis.
Distribution and Habitat
Native to western South America, this species is extensively distributed throughout the high-altitude regions of northwestern Argentina (including Salta, Jujuy, Catamarca, and Tucumán) and parts of Bolivia 1. It thrives at elevations between 1500 and 3000 meters above sea level, growing on rocky slopes, gravelly soils, and within arid shrublands where it tolerates extreme temperature swings.
Appearance
Echinopsis haematantha usually grows solitary, though old specimens may clump at the base. It features globose to shortly cylindrical stems that vary from dark green to purplish-grey. The stems feature distinct ribs decorated with close-set areoles bearing stiff, radiating spines ranging in color from ash-grey to brownish-black. In late spring, it produces funnel-shaped, large flowers near the crown, shining in brilliant shades of blood-red, orange, or gold 2.
Cultivation
In cultivation, this cactus demands full sun and bright direct light to maintain its compact shape and promote heavy blooming. It must be potted in a highly porous, mineral-rich substrate with exceptional drainage. Water thoroughly only when the soil has dried out completely during spring and summer, and transition to a completely dry dormancy during the winter months.
Common Care Mistakes
The most prevalent issue is overwatering, especially during winter, which inevitably leads to root and stem rot. Using organic-heavy, moisture-retaining soils or growing the plant in pots without drainage holes will rapidly damage its delicate root system.
Bibliography
References
Watering
10-30 Days
Water only when the substrate is fully dry; keep bone-dry in winter.
Soil
Well-draining, pumice and sand-rich cactus potting mix
Extremely porous cactus mix enriched with pumice and coarse sand.
Safety
Pet Friendly
The plant is non-toxic but features sharp spines; keep away from children and pets.
Difficulty
Easy
Very easy to care for, provided it is not overwatered and is allowed a cool winter rest.
Native Habitat
Argentina and Bolivia
Hailing from western South America, this mountain cactus is naturally found growing on steep, rocky ledges and dry, gravelly slopes of northwestern Argentina and high-altitude Bolivian valleys.
Frequently Asked Questions
How do you grow Echinopsis haematantha indoors?
It can be successfully grown indoors by placing it on a sun-drenched, south-facing windowsill, using well-draining cactus mix, and ensuring excellent pot drainage.
How often should I water it?
Water it only when the soil is completely dry during summer (about every 10 days). In winter, keep it virtually dry during its cool dormancy period.
Which potting soil should I use?
Choose a fast-draining cactus and succulent mix containing pumice, perlite, river sand, and a minimal amount of organic potting soil.
Is Echinopsis haematantha cold hardy?
Yes, it can briefly tolerate light frosts down to -7°C (19°F) if kept completely dry, but keeping it in a cold, sheltered indoor area is safer.
How do I get it to bloom?
To trigger spring blooming, you must provide a cold, dry winter dormancy period with temperatures around 5-10°C (41-50°F) without watering.
Is it toxic to pets?
It does not contain toxic chemicals, but its sharp and stiff spines pose a physical injury hazard to curious pets.
What is its growth rate?
It is a slow-to-moderate growing cactus, developing only a few centimeters per year even under optimal light and watering conditions.
When should I repot it?
Repot only when the plant completely outgrows its container, usually every 2-3 years, at the beginning of the spring season into a slightly larger pot.
How long do the flowers last?
The flowers usually open in the morning and close by evening. An individual flower lasts 1-2 days, but the plant may produce consecutive buds.
What causes the stem to become soft?
A soft stem is typically a sign of root rot caused by overwatering. Stop watering immediately and, if necessary, take cuttings from healthy tissue to reroot.