Light
Bright Indirect Light
Thrives in bright, sunny spots. Provide slight afternoon shade during intense summer heatwaves.
Reference image 
Reference image Aylostera tarvitaensis
Tarvita Aylostera
Overview
Aylostera tarvitaensis is a miniature, clustering succulent subshrub native to the dry valleys of Bolivia, highly prized by cactophiles for its vibrant orange-red blossoms and neat globose habit 1.
Taxonomy and Naming
Belonging to the Cactaceae family, this species has been historically placed under the broader genus Rebutia. Today, taxonomic databases such as Kew's Plants of the World Online recognize Aylostera as a distinct genus 1. The specific epithet 'tarvitaensis' directly references Tarvita, the Bolivian municipality where the species was first discovered.
Natural Distribution and Habitat
This cactus is endemic to the high-altitude rocky terrains and dry shrublands of Bolivia 2. It thrives in cracks of stony slopes, exposed to intense solar radiation, sharp day-and-night temperature fluctuations, and prolonged dry spells.
Appearance
The stem is spherical to short cylindrical, clustering freely from the base to form small cushions 1. Spirally arranged tubercles are covered with numerous small, bristly whitish-grey spines. In late spring, numerous funnel-shaped, fiery orange-red flowers emerge from the lower parts of the stem.
Cultivation and Care
It requires plenty of bright light, excellent ventilation, and a porous, mineral-based soil mix. Water thoroughly only when the substrate is completely dry. In winter, keep the plant dry and cool to simulate its natural dormancy period.
Common Cultivation Mistakes
Overwatering and using dense, organic soils are the primary causes of root rot. Lack of a cool winter rest will also prevent the plant from producing its characteristic spring blooms.
References
Watering
10-30 Days
Water thoroughly once the substrate is 100% dry. Keep dry in winter to prevent rot and promote blooming.
Soil
Fast-draining, mineral-rich cactus mix with abundant pumice and coarse river sand
Highly porous mineral mix with pumice, grit, and very low organic matter content.
Safety
Pet Friendly
Non-toxic to pets, but has fine spines that can cause physical irritation; keep out of reach of curious paws.
Difficulty
Easy
An easy-care cactus ideal for beginners, provided that dry winter conditions and good drainage are maintained.
Native Habitat
Bolivia (Tarvita region)
Found naturally in the high-elevation rocky slopes and semi-arid scrublands of Bolivia, growing nestled among gravel and stones.
Frequently Asked Questions
Can Aylostera tarvitaensis be grown indoors?
Yes, it grows very well indoors on sunny south- or west-facing windowsills. Its compact size makes it perfect for limited spaces.
How often should I water it?
Water thoroughly in summer only when the soil has dried out completely (approx. every 10 days). In winter, keep it almost completely dry.
Which soil mix should I use?
Choose a highly draining, mineral-heavy soil mix designed for cacti, containing plenty of pumice, lava rock, and coarse sand.
When does Aylostera tarvitaensis bloom?
It produces abundance of bright orange-red flowers from the sides of the stem during late spring and early summer.
How can I encourage blooming?
Allow the plant to undergo a cold, dry dormancy period in winter at temperatures around 5-10°C. This triggers bud formation.
Is it toxic to pets?
It is not chemically toxic, but the spines can cause physical injury to the mouth or paws of cats and dogs if chewed.
How fast does it grow?
It has a slow to moderate growth rate. Over time, it offsets from the base to form beautiful clustered mounds.
Can it tolerate direct sunlight?
Yes, it loves sunny spots, but providing slight protection from intense midday summer sun will prevent sunburn.
Can it stay outdoors in winter?
It can tolerate brief, light frosts down to -5°C if kept bone dry. However, in frosty regions, it is best kept indoors for winter.
When should I repot this cactus?
Repot in spring only when the plant outgrows its container or when the soil medium has degraded and needs fresh nutrients.