Ferocactus herrerae (USDA: 9-11). Full sun. Heat tolerant. Little or no water. Hardy to 20°F. Solitary barrel grows to 8' tall; 24" diameter. Origin: Arizona, Mexico.

Ferocactus acanthodes. Sunset: 8-24; USDA: 9-10. Full sun. Heat tolerant. Little or no water. Hardy to 20°F. Solitary barrel grows to 6' tall; 16' diameter. Native to Arizona, California, northern Mexico.

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Ferocactus covillei. Sunset: 8-24; USDA: 9-10. Full sun. Heat tolerant. Little or no water. Hardy to 25°F. Solitary barrel grows to 3 tall; 3' diameter. Native to Mexico.

Ferocactus glaucescens (Blue barrel) USDA: 9b-11. Full sun to light shade. Heat tolerant. Little or no water. Hardy to 28°F. Solitary barrel grows to 2.5' tall; 18" diameter. Native to Eastern central Mexico.

Ferocactus hamatacanthus ssp. sinuatus (USDA: 8b-11). Full sun. Heat tolerant. Little or no water. Hardy to 16°F. Grows to 2' cluster. Native Texas, Mexico

Ferocactus Pringlei (Mexican fire barrel) USDA: 9b-11. Full sun. Heat tolerant. Little or no water. Hardy to 32°F. Grows to 2' diameter; 2' tall. Native Central Mexico.

Ferocactus wislizenii (Fishhook barrel). Sunset: 8-24; USDA: 9-11. Full sun. Heat tolerant. Little or no water. Hardy to 5°F. Solitary barrel grows to 6' tall; 2' diameter. Native to Arizona, northern Mexico.

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