Sclerocactus species mix

Selenicereus grandiflorus

Selenicereus hondurensis

Selenicereus species mix

Stenocereus alamosensis (Octopus cactus). Syn. Rathbunia alamosensis. USDA: 9b-10. Full sun. Little water. Hardy to 28°F. Thicket of bending stems, up to 10 ft tall. Tubular pinkish red flowers, attracts hummingbirds. Origin: Mexico (Chihuahua and Sonora)

Stenocereus chrysocarpus

Stenocereus dumortieri. (Syn: Isolatocereus dumortieri). USDA: 10. Hardy to 23°F. Full sun. Heat tolerant. Little to moderate water. Fast growing, tree like cactus. Can reach 50' tall. White flowers. Origin: South-central Mexico.

Stenocereus marginatus (Mexican fencepost)

Stenocereus montanus

Stenocereus pruinosus (Stenocereus griseus). Mexican organ pipe. USDA: 10. Full sun. Heat tolerant. Little to moderate water. Hardy to 23°F. Fast growing to 20' tall. Origin: South-central Mexico.

Stenocereus queretaroensis. USDA: 9b-11. Light shade to full sun. Hardy to 28°F. Tree-like growth, with stems to 18'. Pale pink flowers. Origin: Mexico.

Stenocereus thurberi (Arizona organ pipe). Sunset: 12-24; USDA: 9b-12. Full sun. Heat tolerant. Little to moderate water. Hardy to 24° F. Fast growing, with regular water to 20' tall. Origin: Southern Arizona, northern Mexico.

Stetsonia coryne (Argentine toothpick) Sunset: 12-13; USDA: 9-11. Full sun. Heat tolerant. Little to moderate water, summer. Hardy to 18°F. Branching cactus to 20 feet tall. Origin: Low deserts of Argentina, Bolivia.

Strombocactus disciformis

Strombocactus disciformis v. jarmilae

Strombocactus esperanzae pulcherrimus (Strombocactus disciformis ssp. esperanzae)

Strombocactus pulcherrimus

Submatucana madisoniorum v. asterium

Submatucana mandragora

Submatucana senilis

Submatucana species mix

Sulcorebutia species mix