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Cochemiea mazatlanensis

Mazatlan Cactus

Overview

Cochemiea mazatlanensis is a clustering, perennial succulent cactus in the Cactaceae family. Known for its sprawling and decumbent habit, it forms large colonies by producing numerous basal offsets in its natural habitat 1. It is highly prized by collectors for its striking cylindrical stems and brilliant magenta flowers.

Taxonomy and Naming

Originally described under the genus Mammillaria as Mammillaria mazatlanensis, recent phylogenetic analyses have placed this species within the resurrected genus Cochemiea 2. The specific epithet 'mazatlanensis' honors the coastal city of Mazatlán in Sinaloa, Mexico, near where the species was first discovered.

Distribution and Habitat

This species is endemic to western Mexico, spanning across Sonora, Sinaloa, Nayarit, Jalisco, Colima, Michoacán, and Guerrero 1. It typically thrives in coastal shrublands, dry deciduous forests, and rocky cliffs at elevations from sea level up to 1000 meters, growing in nutrient-poor, mineral-heavy soils.

Appearance

The stems are cylindrical, pale green to grayish-green, measuring 10-25 cm long and 3-5 cm in diameter. The spines are prominent, with the central spines often being distinctly hooked. The funnelform flowers are bright pink, reddish-purple, or carmine, appearing in spring and summer. They are followed by small, fleshy, bright red fruits.

Cultivation

In cultivation, Cochemiea mazatlanensis requires an extremely porous, mineral-rich potting mix. During the active spring and summer growth phases, water thoroughly but allow the soil to dry out completely between waterings. Intense light is essential to maintain tight growth and promote regular flowering 2.

Common Cultivation Mistakes

Overwatering during the winter rest period is the most common cause of root rot. Lack of adequate light results in etiolation, where stems become weak, thin, and lose their intense spine coloration, while also failing to produce flower buds.

Bibliography

References

  1. Plants of the World Online (POWO) - Royal Botanic Gardens, Kew. ↩
  2. International Union for Conservation of Nature (IUCN) Red List of Threatened Species. ↩
Light

Bright Indirect Light

Requires full sun or very bright indirect light. Benefits from at least 6 hours of daily sunlight.

Watering

10-30 Days

Water thoroughly in spring and summer only after the soil dries out. Keep bone dry during winter.

Soil

Fast-draining cactus mix rich in pumice and coarse sand

Use a specialized mineral cactus mix with high amounts of pumice, perlite, and coarse sand.

Safety

Pet Friendly

Features hooked spines that can easily snag on skin or clothing. Keep away from curious pets. Non-toxic.

Difficulty

Moderate

Moderately easy to care for, provided its dry winter dormant period is strictly respected.

Native Habitat

Mexico (Sinaloa, Sonora, Nayarit, Jalisco)

Naturally occurs along the western coast of Mexico, inhabiting low-altitude rocky slopes, coastal cliffs, and dry tropical shrublands where it forms spreading colonies.

Frequently Asked Questions

Is Cochemiea mazatlanensis easy to care for indoors?
Yes, it is relatively easy as long as it gets plenty of sunlight and is not overwatered. Withholding water in winter is critical.
How often should I water this cactus?
Water about every 10 days in summer (once the soil is completely dry), and reduce to once a month or not at all in winter.
What potting soil should I use?
Use a highly porous, mineral-rich cactus mix containing plenty of pumice, perlite, and coarse sand.
Is it toxic to pets?
It is non-toxic, but its hooked spines can cause physical injury to curious pets.
How can I encourage it to bloom?
Ensure it receives bright sunlight and undergoes a cool, completely dry winter dormancy period.
When is the best time to repot?
Repot every 2 to 3 years in early spring, just before the active growth season begins.
Why is my cactus turning soft?
Softening stems are usually a sign of root rot caused by overwatering. Stop watering immediately and check the roots.
Is it a fast-growing species?
It has a moderate growth rate, but it offsets freely from the base, forming large clumps over time.
Can it withstand direct afternoon sun?
Yes, once acclimated, it tolerates full sun. Avoid moving it from indoors directly into harsh sun without transitional shading.
What winter temperatures can it tolerate?
It can tolerate temperatures down to 5°C for short periods if kept bone dry. It must be protected from freezing.