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Echinopsis thelegona
Scientific Name: Echinopsis thelegona (F. A. C. Weber) Friedrich & G. D. Rowley
Synonym: Cereus thelegonus, Trichocereus thelegonus
Family: Cactaceae
Echinopsis  thelegona
Trichocereus thelegonus at the Huntington Gardens in early July
Recommended Temperature Zone:
sunset: 16,17,21-24
USDA: 9b-11

Frost Tolerance: Takes some limited frost

Minimum Avg. Temperature: 50F (10C)

Heat Tolerance: Afternoon shade in very hot climate

Sun Exposure: Full sun

Origin: Argentina

Growth Habits: Bushy columnar cactus, branching freely, semi erect or sprawling, dark green stems up to 4 feet long (1.2 m), up to 3 inches in diameter(7.5 cm); about 12 broad ribs; areoles 0.5 inch apart (1.2 cm); 1 central, up to 1.6 inches long (4 cm); 6 radials, 0.5 to 0.8 inch long (1.2-2 cm).

Watering Needs: Little water, needs good drainage

Propagation: Cuttings, seeds

Picture from K. Schumann

Blooming Habits:
Echinopsis thelegona has white nocturnal funnel-shaped flowers in summer, about 8 inches long (20 cm). The fruit is red, hairy, about 2 inches long (5 cm) When ripe, it splits on one side, revealing black seeds.

Fruiting Habits:

Check for Field Collection numbers at Ralph Martin's Site

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Desert-Tropicals is dedicated to provide gardening advice, gardening ideas, and information about flower of all kind for landscape and collections. We try to check carefully the identification of the plants on the illustrations as well as the other information from the page, but occasionally errors do occur. if you notice anything that needs to be changed please contact us. Thanks.

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