Cephalocereus senilis
Old Man Cactus
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Old Man Cactus (Cephalocereus senilis) - Description
Cephalocereus senilis (Old Man Cactus) is a species of cactus native to Guanajuato and Hidalgo in eastern Mexico. It is threatened in the wild, but widespread propagation and popularity in cultivation have reduced the demand on wild populations.
Old Man Cactus (Cephalocereus senilis) - Blooming
Mature plants will bloom funnel-shaped flowers duriing the summer. Followed by ovoid red fruits.
Old Man Cactus (Cephalocereus senilis) - Growth
Grows best with full sun, or full light. Where Cephalocereus is not growing hardy, raise plants indoors as houseplants, or in a warm greenhouse or conservatory. A warm greenhouse has a minimum temperature of 55°F (13°C). During the day, temperatures should be set to 55-64°F (13-18°C) or above, and at night, the temperature should be at 55°F (13°C).In areas with a warm, dry climate, Cephalocereus works great in a desert garden.
Old Man Cactus (Cephalocereus senilis) - Planting
Sow seeds in spring at 66-75°F (19-24°C).
Old Man Cactus (Cephalocereus senilis) - Pest
Affected by root mealybugs and root rot.
Old Man Cactus (Cephalocereus senilis) - Interesting facts
There are only 3 known species in the genus Cephalocereus, native to rocky areas in C. Mexico.
Old Man Cactus (Cephalocereus senilis) - Soil and irrigation
Does best in poor to moderately fertile, sharply draining soil that is slightly alkaline. A mix of 3 parts standard cactus potting mix and 1 part limestone chips works fine for indoor plants. Provide moderate amounts of water during active growth. Best to keep completely dry in winter.
