If you’re a collector seeking something rare and out of the ordinary, Myrtillocactus geometrizans 'Fukurokuryuzinboku' is a captivating choice. This monstrous form of the popular Blue Candle Cactus stands out with its unusual tubercled ribs, giving it a distinctive look that has earned it the nickname "Breast cactus" or "Titty cactus." Unlike the standard Myrtillocactus geometrizans, this Japanese cultivar showcases dramatic, irregular growth, making it highly sought after by enthusiasts.
Native to Central Mexico, the common form of Myrtillocactus geometrizans is widely recognized for its upright, candelabra-like structure. However, the 'Fukurokuryuzinboku' variant sets itself apart with strange, bumpy growths along its ribs that give it an organic, almost sculptural appearance. Growing up to 4.5 meters in height, with a spread that can reach up to 5 meters wide, this plant is a statement piece in any collection.
 
 
Features
A Rare Collectible
While the standard Myrtillocactus geometrizans is often found in garden centers and used as grafting stock for other cacti, the 'Fukurokuryuzinboku' cultivar is much rarer, prized by collectors worldwide. Its strange, monstrous form makes it a visual spectacle, perfect for those seeking something unique in their plant collection. The bulbous, breast-like tubercles are what give this plant its common names, adding to its intrigue.
Impressive Size & Growth
In optimal conditions, this cactus can grow to impressive heights, potentially reaching 4.5 meters tall with a wide crown. Like its non-monstrous counterpart, the 'Fukurokuryuzinboku' exhibits blue-green stems and geometric patterns across its ribs. As it matures, this slow-growing plant becomes an architectural centerpiece.
 
 
Etymology
Japanese Mythology
The name 'Fukurokuryuzinboku' is deeply rooted in Japanese mythology. It combines the elements of "fortune" (fuku), "fief" or "happy" (roku), "dragon" (ryu), "Shinto god/spirit" (jin), and "tree" (boku). This name reflects the plant’s association with Fukurokuju and Ryujin, two of the Seven Lucky Gods in Japanese folklore. Fukurokuju is the god of wisdom, longevity, and happiness, while Ryujin is a powerful dragon god. Together, these mythological figures lend a sense of spiritual significance to this unusual cactus.
Botanical Origins
The genus Myrtillocactus is named from the Greek word myrtillus, meaning "small myrtle," referring to an evergreen shrub with similar characteristics. The specific epithet geometrizans highlights the plant’s geometric ribbing, which is a standout feature of both the standard and monstrous forms. These ribbed patterns, while common in the genus, take on a unique character in the 'Fukurokuryuzinboku' cultivar, making the plant even more eye-catching.
 
 
Plant Care
Light Requirements
Myrtillocactus geometrizans 'Fukurokuryuzinboku' thrives in bright, indirect sunlight and can tolerate some direct light. However, to avoid sunburn, especially in the peak of summer, ensure it receives filtered light when outdoors. If kept indoors, place the plant near a sunny window for optimal growth. It is important to mimic the plant’s natural habitat—arid, desert-like conditions—by giving it ample sunlight.
Watering Tips
Like most cacti, the 'Fukurokuryuzinboku' requires minimal watering. Allow the soil to dry out completely between waterings to prevent root rot. Overwatering is a common issue with cacti, so it’s best to err on the side of caution. A well-draining cactus mix will help the plant thrive by preventing water from pooling at the roots.
Soil and Fertilization
This cactus prefers sandy, well-draining soil. Use a potting mix designed for succulents or create your own blend with equal parts perlite and cactus mix. When it comes to feeding your Myrtillocactus geometrizans 'Fukurokuryuzinboku', a balanced cactus fertilizer can be used sparingly. Fertilize monthly during the growing period to provide essential nutrients, but avoid over-fertilizing, as this can lead to weak growth. There’s no need to adjust your fertilization routine throughout the year, as this cactus is resilient and adaptable to consistent care.
Temperature and Humidity
This plant is highly tolerant of heat and can handle temperatures above 30°C. It prefers dry environments and can survive short periods of drought. However, it is not frost-tolerant, so if you live in a cooler climate, be sure to bring your cactus indoors when temperatures drop below 5°C. Avoid exposing the plant to high humidity or misting, as excess moisture can lead to fungal issues.
Common Issues and Solutions
Root Rot
One of the most common issues with the 'Fukurokuryuzinboku' is root rot, usually caused by overwatering or poor drainage. To prevent this, always check that the soil has completely dried out before watering. If the plant starts to show signs of wilting or discoloration, repot it into fresh, dry soil and remove any affected roots.
Pests
Though this cactus is relatively hardy, it can occasionally attract pests like mealybugs or spider mites. Regularly inspect your plant for signs of infestation, such as white, cottony patches or tiny webs. If pests are present, use a neem oil solution or a gentle insecticidal soap to treat the plant. Keeping the plant in a well-ventilated area with good air circulation can also reduce the likelihood of pests.
Sunburn
While Myrtillocactus geometrizans 'Fukurokuryuzinboku' loves the sun, too much direct exposure can cause sunburn, resulting in brown or yellow patches on its surface. If this occurs, move the plant to a spot with filtered light or introduce some shade during the hottest parts of the day.
 
 
Additional Considerations
Grafting Stock
Myrtillocactus geometrizans is often used as grafting stock for other cactus species due to its robust growth and ability to support a variety of scions. However, the 'Fukurokuryuzinboku' cultivar, with its monstrous growth habit, is less commonly used for grafting. Its ornamental value lies more in its unusual appearance than in its functionality as grafting stock.
 

With its unique, breast-like tubercles and sprawling growth habit, 'Fukurokuryuzinboku' is a conversation starter in any collection. Its bluish-green color and strange, sculptural form make it an excellent focal point in xeriscape gardens or minimalist indoor spaces. This plant not only adds visual interest but also embodies a piece of Japanese mythology, offering both aesthetic and cultural depth.
 
As always, researching where your species, cultivar or hybrid originates and understanding how it or its 'parents' grow in their natural habitat will help you provide the best care for your plant. By mimicking these conditions, you ensure your plant doesn’t just survive, but thrives.