San Pedro Semi Crestado
This curious cactus is a variety of the well-known San Pedro cactus, specifically the semi-crested variety. Its scientific name is Trichocereus pachanoi cristata (synonym: Echinopsis pachanoi “cristata”), although it is also known as Crested San Pedro, Monster Cactus, Brain Cactus, and Fan Cactus. Only one out of every thousand Trichocereus pachanoi will exhibit a crest mutation.
Characteristics
The Trichocereus pachanoi Cristata or Brain Cactus is an irregularly shaped cactus prone to forming crests. It has few spines, which tend to be very small.
It tolerates dry spells, but excessive watering can harm the plant.
Lighting
The Trichocereus pachanoi cristata can be grown in full sun as well as semi-shade. It can also be grown indoors as long as the space is well-lit.
Temperature
The Trichocereus pachanoi cristata can tolerate temperatures close to 0 ºC, but it is recommended to keep it above 5 ºC.
Soil
Like any cactus, the Trichocereus pachanoi cristata requires fertile and well-drained soil.
Watering
Water once a week during the hot seasons. During the rest of the year, water once a month or stop watering if the ambient temperature is very low.
The Brain Cactus does not tolerate waterlogging. Remove any excess water that may remain in the pot's tray.
Fertilizer
During spring and summer, it is advisable to fertilize the substrate of the Trichocereus pachanoi cristata, especially if it is in a pot. Add a liquid cactus fertilizer diluted in the watering water every 30 days. Fertilizing should be suspended during winter.
Propagation
The Trichocereus pachanoi cristata propagates through cuttings obtained by dividing any crest. Allow the cut to heal for at least 2 days in a cool, well-lit place, but protected from the sun, and then proceed to plant it.
