Copiapoa tenuissima

Recommended temperature zone: USDA: 10b-12

Frost tolerance: Avoid frost

Minimum avg. temperature: 50°F (10°C)

Heat tolerance: Should be protected from excessive heat and sun in summer

Sun exposure: Light shade to full sun

Origin: Northern Chile (coastal mountains)

Growth habits: Slowly clumping, heads up to 1.5" in diameter (4 cm)

Watering needs: Keep fairly dry in winter, water moderately in summer
Propagation: seeds, grafting, or division

Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz