Ferocactus townsendianus. Sunset: 8-24; USDA: 9-10.  Hardy to 25°F. Little to moderate water. Solitary barrel cactus to 20" tall. Deep orange to pale yellow flowers with darker orange mid-stripes. Origin: Baja California Mexico.  

Ferocactus viridescens

Ferocactus viscainensis. USDA: 9b-11. Hardy to 25 F. Full sun. Hardy to 25 F. Water sparingly summer, keep dry winter. Usually solitary barrel up to 3' tall, 18" diameter. Yellow flowers with orange red stripes. Origin: Southern Baja California Mexico.

Ferocactus wislizenii (Fishhook barrel). Perfect seed for the beginner. Sunset: 8-24; USDA: 9-11. Full sun. Heat tolerant. Little or no water. Hardy to 5°F. Solitary barrel grows to 8' tall; 2' diameter. Orange / red flowers, large yellow fruit. Origin: Arizona, northern Mexico.

Ferocactus wislizenii (Fishhook barrel). Red flowers. Perfect seed for the beginner. Sunset: 8-24; USDA: 9-11. Full sun. Heat tolerant. Little or no water. Hardy to 5°F. Solitary barrel grows to 8' tall; 2' diameter. Red flowers, large yellow fruit. Origin: Arizona, northern Mexico.