Trichocereus bridgesii var. Monstrosus (this is a real plant, we promise)

Mother plant.
Mother plant.

The Trichocereus bridgesii 'Monstrosus' is a nursery produced cultivar. This species follows a clustering habit that branches at the base. It is a slow growing cactus that takes on a light glaucous green color. It reaches an approximate height of 1’ 4” at full maturity. Each stem consists of short, branching upright sections. This cactus has limited areolas and spines within the basal nodes of the plant. Spines take on a honey to brown color. They typically form groups of no more than four and are rather long (up to 1 ½ - 2 ½ inches). The upper part of the stem is cylindrical, smooth and contains no areolas. It is currently not known as to whether this species flowers.

The Trichocereus bridgesii 'Monstrosus' is an easier species to cultivate. Reports indicate hardiness down to 11°F for short periods. USDA hardiness zone is 10. Requires a fertile, very well-draining soil mixture. This cultivar thrives with a more regular watering schedule than most other cacti. This species requires nearly the same amount of water as a “regular” plant. Provide enough time for the soil to dry out before watering again. Fertilize monthly with a balanced fertilizer (The Cactus King uses a 3/3/3 fertilizer), during the growing season (summer months).

When cultivated outdoors, this species does appreciate full sun. During the summer months in hotter regions, this cactus is susceptible to sun burning. In this instance, it is best to grow them in light shade. For indoor cultivation, bright light and direct sun is required. During the winter months, the Trichocereus bridgesii 'Monstrosus’ should be placed in a cool, bright area. In doing so, you will help your friend enter a state of winter dormancy. Water should be nearly entirely withheld, and the use of fertilizer should stop. If light levels are too low, etiolation can be an issue.

Plant Details
USDA Zone Information: 
Flower : 
Ideal Light Conditions: 
Full sun to partial shade
Ideal Water Conditions: 
Water regularly during growing season (summer months). Keep dry during colder, winter months.
Speed of Growth: 
Mature Height: 
1' 4"
Latin Name: 
Trichocereus bridgesii var. Monstrosus
Common Name: 
Penis Cactus, The More Sensual of Cacti, San Pedro Penis, Pornographic Cactus, Penis Plant

Corporate Clients (The King hangs hard)


RoboCop (1987)
RoboCop 2 (1990)
Hot Pursuit (2015)


USA Network's Queen of the South (2019)

Botanical Gardens:

New York Botanical Gardens
Oklahoma City Zoo/Botanical Gardens
Mercer Arboretum in Houston, Texas
Meijer Gardens in Grand Rapids, Michigan


Houston, TX Zoo
San Antonio, TX Zoo

Other Clientele:

Houston, TX Rodeo

The Cactus King's cacti and succulents have gone international! If you ever find yourself in China with a little spare time, head to the Chimelong Ocean Kingdom. It is the largest Aquarium in the world (no big deal, pun definitely intended).

The Cactus King's plants are also featured in the Chimelong Ocean Kingdom's partner parks. These include their water park, amusement park, crocodile park and botanical gardens.

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Addresses & Contact Information

Physical Address (IN-PERSON VISITS):
7900 I-45N
Houston TX, 77037

We're located directly next to the Tajj Inn.
Mailing Address (WEB ORDER PAYMENTS):

Lyn Rathburn
PO Box 16099
Houston, TX 77222

Please make checks/money orders out to "Lyn Rathburn."
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