Source: Wikimedia Commons
Astrophytum
IntermediateA cactus with star-like shape and white flecks. Many popular varieties like Kabuto and Ranpo.
About
Astrophytum is a small cactus genus of six species native to the limestone deserts and semi-arid plains of northern Mexico and southern Texas. The genus is celebrated among collectors for its outstanding ornamental qualities: the star-shaped cross-sections suggested by the genus name (Greek for 'star plant'), and surface markings of white floccose dots. Prominent species include A. asterias (Sand Dollar Cactus or Bishop's Cap), A. myriostigma (Bishop's Miter), and A. ornatum (Star Cactus). A. asterias in particular, with its densely stippled surface and large yellow flowers, is considered one of the most desirable cacti and can command high prices. Mature plants are 5–30 cm across. All prefer full sun with light summer shading, excellent drainage in a slightly alkaline substrate, and seasonal watering. Growth is extremely slow. Grafting is commonly practiced to accelerate development.
Source: Wikipedia (CC BY-SA 4.0)
Basic Info
Origin
North America
Lifespan
Perennial (decades)
Size
5-30cm
Temperature
5〜35℃
Humidity
30〜50%
Watering & Fertilizer
Minimal
Growing Tips
Lighting
Prefers direct sun but shade in midsummer
Watering
2-3 times monthly in growth season. No water in winter
Varieties
Kabuto, Ranpo, Hannya and many more species
Notes
Seed propagation is standard
Astrophytum FAQ
QWhat is the growing difficulty level for Astrophytum?
Intermediate. A variety suitable for intermediate growers. Requires some cultivation experience and knowledge of environment management. Pay careful attention to temperature and humidity control.
QWhat is the ideal temperature for Astrophytum?
The ideal temperature for Astrophytum is 5〜35℃. Recommended humidity is 30〜50%. Avoid sudden temperature changes and maintain a stable environment.
QWhat is the lifespan of Astrophytum?
The average lifespan of Astrophytum is Perennial (decades). With proper cultivation environment and nutrient management, you can keep it healthy for a long time.
QHow large does Astrophytum get?
The mature size of Astrophytum is 5-30cm. This may vary slightly depending on cultivation environment and individual differences.
QHow should I water and fertilize Astrophytum?
Astrophytum: watering & fertilizer — Minimal. Aim for appropriate frequency and amount.
QWhat is the typical price for Astrophytum?
The price of Astrophytum varies significantly by variety, characteristics, size, and lineage. Please check ボタちょく's price guide for the latest market information.
Last updated: June 23, 2026
References & Sources
Edited & verified by: BoTachoku Editorial Team
The classifications, regulations, and growing data on this page are created and verified based on the primary information database below.
Regulations & Conservation Status
サボテン科 Cactaceae は科全体が CITES 附属書II。ただし星兜 Astrophytum asterias は附属書I(1987年〜、国際商業取引は原則禁止)。
Sources: CITES Checklist — Cactaceae spp. (Appendix II, whole family)
Regulations may change. Always verify the latest information with the relevant authorities.
Related Species
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