Light
Filtered Sun
Prefers bright, filtered sunlight; avoid intense direct midday sun to prevent scorching.
Reference image 
Reference image Lophophora alberto-vojtechii
Alberto's Peyote
Overview
Lophophora alberto-vojtechii is the smallest known species in the family Cactaceae, characterized by its geophytic growth habit. It grows as a solitary, spineless, slow-growing succulent subshrub 1.
Taxonomy and Naming
Described recently in 2008 by Czech botanists Bohata, Myšák, and Šnicer, it is the newest and most diminutive taxon within the genus Lophophora. Its specific epithet honors both Alberto Vojtěch Frič and Vojtěch Myšák 2.
Distribution and Habitat
Endemic to the semi-arid Chihuahuan Desert of northern Mexico, specifically in the states of San Luis Potosí, Coahuila, Zacatecas, and Nuevo León. It colonizes alluvial flats rich in clay and limestone under harsh, dry conditions 1.
Appearance
With a stem diameter rarely exceeding 2 to 3 cm, it features a flattened, greyish-green body with tufts of white wool on its areoles instead of spines. Its flowers are comparatively large, presenting beautiful pale pink to yellowish-white petals.
Cultivation
An expert-level cactus in cultivation. It demands a highly porous, strictly mineral substrate consisting of pumice, gravel, and limestone grit. Deep clay pots are essential to accommodate its extensive taproot. Keep completely dry in winter 2.
Common Cultivation Mistakes
Overwatering and the use of organic potting soil are the primary causes of root rot. Lack of sufficient light leads to abnormal stretching (etiolation) and loss of its flat, natural appearance.
References
Watering
14-60 Days
Allow substrate to dry completely between waterings. Stop watering entirely in winter.
Soil
Fully porous, mineral-rich mix consisting of limestone, pumice, and a minimal amount of clay loam
Use 100% mineral mix (pumice, clay, limestone, grit) with zero organic peat.
Safety
Risky for Pets
Toxic to pets; contains natural psychoactive alkaloids (mescaline and others).
Difficulty
Expert
Expert care required due to high vulnerability of the taproot to overwatering.
Native Habitat
Mexico
Native to the high-altitude desert plateaus of northern Mexico, thriving in fine alluvial silts and limestone soils.
Frequently Asked Questions
How large does Lophophora alberto-vojtechii grow?
This species is the smallest of its genus. A mature stem typically reaches only 2 to 3 cm in diameter.
Is it toxic to pets?
Yes, it is toxic to pets due to the presence of various natural alkaloids.
Should it be watered in winter?
No, during its winter dormancy (November to March), the plant must be kept completely dry and protected from cold.
What type of soil should be used?
Use a completely mineral-based soil mix consisting of pumice, coarse sand, and limestone grit, with zero peat.
Does it like direct sunlight?
It prefers strong, filtered sunlight. Extremely harsh direct summer sun can cause sunburn on the epidermis.
What color are the flowers?
It typically produces pinkish-white flowers, sometimes with yellowish-pale brown hues.
What kind of pot should I choose?
Deep but narrow terracotta pots should be chosen to accommodate its long, carrot-like taproot.
What is its growth rate?
It is extremely slow-growing. It takes several years to reach blooming maturity from seed.
Can it be grown indoors?
Yes, but it must be kept on south-facing windowsills with excellent air circulation and ample filtered light.
How can I prevent root rot?
Prevent it by watering only when the substrate is bone-dry and ensuring no stagnant water remains in the saucer.