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Goat's Horns, Bishop's Hat, Bishop's Cap
Astrophytum capricorne

Family: Cactaceae (kak-TAY-see-ee) (Info)
Genus: Astrophytum (ass-troh-FY-tum) (Info)
Species: capricorne (kap-ree-KOR-nee) (Info)
Synonym:Astrophytum capricorne var. capricorne
Synonym:Echinocactus capricornis


Cactus and Succulents


6-12 in. (15-30 cm)

12-18 in. (30-45 cm)

18-24 in. (45-60 cm)


9-12 in. (22-30 cm)

12-15 in. (30-38 cm)


USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:

Full Sun

Light Shade


Plant has spines or sharp edges; use extreme caution when handling


Bloom Color:

Gold (Yellow-Orange)

Bloom Time:

Mid Summer


Unknown - Tell us

Other details:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

From seed; sow indoors before last frost

From seed; direct sow after last frost

By grafting

Seed Collecting:

Allow unblemished fruit to ripen; clean and dry seeds

Properly cleaned, seed can be successfully stored


This plant has been said to grow in the following regions:

Chandler, Arizona

Phoenix, Arizona

Tucson, Arizona

Thousand Oaks, California

Gardeners' Notes:


On Nov 5, 2005, cactus_lover from FSD
Pakistan (Zone 10b) wrote:

Varies in the amount of flock on the surface and in the number and length of the twisted brown spines.


On Mar 3, 2004, palmbob from Acton, CA (Zone 8b) wrote:

This is the 'hairy' one of the bunch (Astrophytums) and probably the least ornamental. I have had this one outdoors for 6-7 years (zone 9b in Thousand Oaks, California) and tolerates mild frost without a problem as do all the other common species of Astrophytum. Though this one is spiny, its spines are not sharp and feel a bit like cat whiskers- stiff but pliable. As plant ages spines get a bit more intense and messier, but relatively sparse as a small ovoid plant.