I am a small, globular to slightly cylindrical cactus, renowned for my pronounced rib structure.

My most defining feature is my body, which is divided into 5 to 8 (often 8) prominent, triangular ribs, giving me a stark, star-like silhouette when viewed from above.

My areoles often produce attractive, comb-like or pectinate spines that lie flat against the ribs, creating intricate patterns.

I produce showy flowers from the crown, typically yellow, pink, or white, which are large relative to my small size.

I am native to the arid regions of the southwestern United States (Texas) and northeastern Mexico.

I am a true desert cactus with very low water needs. The "soak and dry" method is essential.

Water me thoroughly only when the soil is completely dry. In summer, this may be every 2-3 weeks; in winter, reduce watering to once a month or less.

I am extremely prone to rot if overwatered. Ensure my pot has excellent drainage and I am never left sitting in water.

I prefer low humidity.

I am a sun-lover and require abundant, direct light to thrive and maintain my compact shape.

Provide at least 6-8 hours of direct sunlight daily. A south-facing window is ideal indoors.

Insufficient light will cause etiolation (stretching), ruining my classic star shape.

I thrive in warm, hot temperatures and am best suited to USDA zones 9-11 if grown outdoors.

My ideal growing range is between 21°C and 32°C.

I require a cool, dry winter rest period (around 10°C) to encourage flowering. I am not frost-hardy.

I am a perfect specimen for a sunny windowsill, desert dish garden, or specialized cactus/succulent collection.

Use a very gritty, fast-draining cactus or succulent mix. Adding extra perlite or pumice is beneficial.

A shallow, terracotta pot is ideal as it dries out quickly and accommodates my shallow root system.

Handle with care using tongs or folded paper to protect yourself from my spines and to protect my delicate skin from oils.

I am a very light feeder. Fertilize only during the active growing season (spring and summer).

Use a balanced, water-soluble fertilizer diluted to 1/4 strength, or a specialized cactus fertilizer, once a month at most.

Do not fertilize during the dormant fall and winter period.

Scientific Name: Astrophytum asterias

Common Names: Star Cactus, Sand Dollar Cactus, Sea Urchin Cactus, Star Peyote

Plant Family: Cactaceae

Plant Type: Perennial cactus

While not considered highly toxic, I am physically hazardous due to my sharp spines, which can cause injury to curious pets. Ingestion may cause mild stomach upset. It's best to keep me out of reach.

As a small, slow-growing plant, my air purification contribution is minimal. My primary benefit is ornamental.