(c) Joseph Aubert, some rights reserved (CC BY)
iNaturalist
Sand Dollar Cactus Plant Care
Astrophytum asterias (Zucc.) Lem.
This unique cactus species is known for its star-like shape and lack of spines, making it stand out in any collection. Originally hailing from Mexico, the Astrophytum asterias is highly sought after by plant enthusiasts for its striking appearance and ability to thrive in dry, sunny conditions.
Every 14–21 days
Full sun
70–90°F
40–60%
What Is the Sand Dollar Cactus?
Sand Dollar Cactus (Astrophytum asterias) belongs to the Cactaceae family within the Astrophytum genus. Sand Dollar Cactus is native to small parts of Texas in the United States and Mexico. Sand Dollar Cactus is also known as Sea Urchin Cactus, Star Cactus.
Sand Dollar Cactus displays a low clumping cactus growth habit, reaching up to 0 inches tall with a spread of approximately 1 inches. Sand Dollar Cactus produces yellow flowers with red centers.
Leaf size: approximately 0 inches.
How Often Should You Water a Sand Dollar Cactus?
Astrophytum asterias requires watering every 14–21 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 14–21 days
Let soil partially dry between waterings
What Light Does the Sand Dollar Cactus Need?
Sand Dollar Cactus thrives in full sun light conditions. The optimal light range is 0–0 lux. Avoid placing Sand Dollar Cactus in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Full sun
0–0 lux
What Temperature and Humidity Does the Sand Dollar Cactus Prefer?
Astrophytum asterias grows best at temperatures between 70°F and 90°F. Sand Dollar Cactus prefers humidity levels of 40–60%.
Temperature
70–90°F
Humidity
40–60%
What Soil Mix Works Best for a Sand Dollar Cactus?
Sandy, well-draining cactus mix with perlite and coarse sand. Good drainage is essential for Sand Dollar Cactus to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Sand Dollar Cactus?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Sand Dollar Cactus?
Sand Dollar Cactus can be propagated through seeds, offsets.
Fertilizing
Every 1 month
During the growing season
Is the Sand Dollar Cactus Toxic to Pets and Children?
Non-Toxic
Non-toxic to humans and pets
What Pests and Diseases Affect the Sand Dollar Cactus?
Sand Dollar Cactus is susceptible to mealybugs, spider mites. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
What USDA Hardiness Zone Does the Sand Dollar Cactus Need?
Sand Dollar Cactus grows outdoors in USDA Zone 10b – 12b. Native to small parts of Texas in the United States and Mexico, Sand Dollar Cactus is adapted to warm climates. In cooler regions, grow Sand Dollar Cactus as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 10b – 12b
Keep exploring plants
Sand Dollar Cactus is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Astrophytum genus — compare its care with other Astrophytum species on PlantoScan.
Sand Dollar Cactus thrives in bright light and direct sun — see other bright-light plants.
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