The “Penis Cactus,” scientifically known as Echinopsis lageniformis f. monstrosa, is a unique succulent. This article provides a comprehensive guide to understanding and caring for this unusual plant.
Understanding the “Penis Cactus”
The “Penis Cactus” (Echinopsis lageniformis f. monstrosa) is characterized by its cylindrical stems with an irregular, lumpy growth pattern, known as a monstrose form. The upper stem segments are smooth and typically lack spines, while lower sections may have ribs and a few spines. This distinctive shape is a natural mutation of the Echinopsis lageniformis species, also known as the Bolivian Torch cactus.
The plant has a light green to bluish coloration. It is a prized specimen among cactus collectors. There are two main clones: ‘Clone A’ (long-jointed type) which grows more vertically, and ‘Clone B’ (short-jointed type) which is more compact and forms frequent offsets.
Essential Care for Your Unique Cactus
Adequate light is important for the “Penis Cactus” to maintain compact growth. This plant thrives in bright, direct sunlight, ideally receiving at least six hours daily. Insufficient light can lead to etiolation, where the plant stretches and becomes leggy.
Well-draining soil is essential for this cactus. A specialized cactus or succulent mix, amended with coarse sand, pumice, or perlite, ensures proper aeration and prevents water retention. The soil mixture should be roughly 70% inorganic material to 30% organic material to promote drainage.
Watering should follow a “soak and dry” method, allowing the soil to dry completely between waterings during the active growing season from spring to early fall. Overwatering can lead to root rot. During winter dormancy, watering frequency should be significantly reduced, often to once a month or less, only when the plant appears shriveled.
The “Penis Cactus” prefers warm, dry environments, with indoor temperatures between 65°F and 80°F (18°C and 27°C). It tolerates heat but is susceptible to frost damage and prefers low humidity. During the growing season, a diluted cactus-specific or low-nitrogen NPK fertilizer can be applied monthly. Fertilization should be avoided during fall and winter dormancy to prevent disruption of its natural growth cycle.
Propagation and Growth Habits
Propagation of the “Penis Cactus” is best achieved through stem cuttings. Cut a healthy stem segment cleanly with a sterilized tool. Allow the cut surface to dry and form a callus, which can take several days to a few weeks. Once callused, plant the cutting in dry, well-draining cactus soil.
The best time for propagation is during the active growing season when temperatures are consistently above 70°F (21°C). This cactus is slow-growing, reaching up to 2 feet (60 cm) in height and 2 to 3 inches (5 to 8 cm) in diameter. It develops new “heads” or branches, contributing to its distinctive, irregular shape.
Common Issues and Solutions
Root rot is a common issue for the “Penis Cactus,” caused by overwatering or poorly draining soil. Prevention involves following the “soak and dry” watering method and ensuring proper soil composition. If root rot occurs, trim affected roots and repot the plant into fresh, dry soil.
Common cactus pests like mealybugs and spider mites can infest the plant. Mealybugs can be treated by applying rubbing alcohol with a cotton swab. Spider mites, often found in dry, dusty conditions, can be managed by improving air circulation and lightly misting the affected area.
Etiolation, characterized by stretched or leggy growth, indicates insufficient light. To solve this, relocate the cactus to a brighter spot or supplement with a full-spectrum grow light. Maintaining good airflow around the plant also helps prevent fungal issues, which can appear as dark spots or splotches.