Pilosocereus royenii aka Dildo

Pilosocereus royenii is an easy-to-grow columnar cactus that is remarkably hardy and drought-tolerant once established. It thrives in challenging conditions including rocky substrates and even tolerates deep shade and high humidity, which is unusual for cacti. The main requirements are well-draining soil and protection from frost. Avoid overwatering, especially during cold periods, as this can lead to fungal disease.

Pilosocereus royenii can be propagated by seeds or stem cuttings. For seeds, sow in sandy loam soil and maintain high humidity at around 14°C. Dust with sulfur powder to prevent fungal infection. Cuttings root best at around 20°C. Germination and rooting can take several weeks to months, so patience is essential.

Pilosocereus royenii is a slow-growing, tree-like columnar cactus that reaches 2-8 meters (6-26 feet) tall at maturity, with some specimens reaching up to 10 meters. The trunk can grow up to 60 cm in diameter with a thin, reddish-brown bark. Branches are vertical or ascending, blue-green in color, and 5-10 cm in diameter. This is an extremely slow-growing species—a 5 meter tall specimen may be over 100 years old.

Pilosocereus royenii requires warm temperatures and is hardy in USDA zones 9-11. The minimum temperature is 12°C (54°F), though plants can tolerate brief exposure to 0-5°C (32-41°F) when completely dry. Frost will damage growing tips, and prolonged cold can be fatal. In cooler climates, grow in containers that can be moved indoors during winter or provide frost protection.

Yes, Pilosocereus royenii produces attractive nocturnal flowers that are fleshy and tubular, ranging from whitish-green to rose pink or purple-red, measuring up to 5 cm long and 2.5-4 cm wide. Flowers extend horizontally from the branches, opening at night and persisting into the following day. Flowering occurs year-round when adequate rainfall is available. After pollination, the plant produces depressed globose fruits that ripen to purple-black with sweet, edible red pulp.

Pilosocereus royenii evolved for bat pollination, with nocturnal flowers that produce nectar rewards suited to bat visitors. However, scientific research has documented a 'pollination breakdown' in some Caribbean populations. Studies in Puerto Rico found that carpenter bees (Xylocopa mordax) are now the primary effective pollinators, likely due to declining bat populations. The flowers are self-incompatible and require cross-pollination to set fruit.

Pilosocereus royenii grows best outdoors in USDA zones 9-11 where temperatures stay above 12°C. It is salt-resistant and wind-tolerant, making it excellent for coastal gardens. Plant on a south-facing slope near a wall for extra warmth and frost protection. The species tolerates a wide range of conditions including rocky limestone soils, coastal exposures, and surprisingly, even deep shade and high humidity. In cooler climates, grow in containers to move indoors for winter.

Like most cacti, Pilosocereus royenii is susceptible to mealybugs (both aerial and root mealybugs), scale insects, and spider mites. Treat infestations by wiping with rubbing alcohol and applying insecticidal soap or neem oil. The main disease concern is root rot and fungal infections caused by overwatering, especially during cold periods. LLIFLE specifically warns this species is 'very susceptible to fungal disease if overwatered in cold periods.' Ensure excellent drainage and reduce watering in winter.

The fruit of Pilosocereus royenii is edible and can be eaten raw. The fruits are depressed globose berries that ripen to purple-black, containing slightly sweet, juicy red pulp with small black seeds. Useful Tropical Plants rates the edibility at 2 out of 5, indicating a fair but not exceptional eating quality. The fruit is traditionally consumed in the plant's native Caribbean range.

Pilosocereus royenii is a summer-growing species that benefits from regular watering during the warm growing season, allowing soil to dry between waterings. During winter, reduce watering significantly and keep the plant dry, especially if temperatures drop. Cold, wet conditions are the primary cause of fungal problems. Avoid fertilizing in winter. In frost-prone areas, move container plants indoors or provide frost protection during cold snaps.

Information about the fragrance of Pilosocereus royenii flowers is limited in botanical sources. As a species with nocturnal, bat-pollinated flowers, it may produce subtle scents to attract pollinators at night, though this has not been specifically documented. The flowers are described primarily for their visual characteristics rather than fragrance.

Dildo’s native range is Central and South America.

Dildo does best in dry soil and should only be watered sparingly.

To keep your Dildo healthy, it's important to use a potting soil that won't retain too much moisture. A soil that drains well and contains perlite or vermiculite for drainage and some organic matter for nutrition is ideal. Adding a few handfuls of perlite to regular cactus soil from the store is an easy way to create this type of soil mix.

Dildo requires abundant, bright, and direct light to thrive. The best placement for this plant is within one foot of a window to ensure it receives enough light. If you live in an area with more extreme weather, such as hot summers or cold winters, you may need to adjust the placement of the plant accordingly. During hot summer months, it is important to place the plant away from full sun, as this can cause the leaves to yellow or burn. During cold winter months, it is best to move the plant closer to the window to take advantage of the extra light that can help it survive. By keeping an eye on the current weather in your area, you can make sure your Pipe Organ Cactus is always in the right place to thrive.

Dildo thrives in dry environments, but if you provide extra humidity or mist your plant, the lingering water on its leaves could create an ideal environment for certain fungal diseases.

The Dildo is characterized by its slow growth and doesn't need fertilization in addition to its potting soil. By renewing the soil in its pot once a year, it should have enough nutrition. Remember, plants get their energy from sunlight, not from any fertilizers.

There is no verified data on the toxicity of this plant in the records of Ploi. If any person, including yourself, a family member, or a pet, consume plant material with an uncertain toxicity level, it is advisable to seek the advice of a healthcare expert.