TBM A 'Long Form' - (Rooted Plants)

This is a very large version of this clone with very long arms

TBM Clone A, a sought-after cultivar in the world of cacti, is a monstrous form of the Bolivian Torch cactus, Trichocereus bridgesii. Its scientific name is Trichocereus bridgesii f. monstrosus 'Clone A', often abbreviated to TBM 'A'. This particular clone is distinguished by its elongated, columnar growth, setting it apart from its more famous and aptly named relative, TBM Clone B, the "Penis Cactus."

Native to the high-altitude regions of Bolivia, the parent species, Trichocereus bridgesii, is a fast-growing columnar cactus. TBM Clone A is a naturally occurring mutation of this species that has been propagated vegetatively through cuttings to preserve its unique characteristics.

Physical Characteristics

TBM Clone A, also known as the "long form," exhibits a predominantly upright growth habit. Its stems are typically a light to bluish-green and are characterized by having fewer and more widely spaced areoles (the small, cushion-like structures from which spines, flowers, and new stems arise) compared to the standard Trichocereus bridgesii. While it can be mostly spineless, it's not uncommon for it to produce occasional, long, honey-colored to brown spines. The "monstrose" nature of this cactus results in irregular, somewhat melted or distorted rib structures, giving each specimen a unique and sculptural appearance. It can eventually form a branching, shrub-like cluster, reaching several feet in height over time.

A key distinction between TBM Clone A and the more prevalent TBM Clone B is their growth pattern. While Clone A grows in longer, more columnar sections, Clone B is known for its short, segmented, and often phallic-looking growth, which has earned it its common name.

Care and Cultivation

Cultivating TBM Clone A is relatively straightforward, making it a suitable choice for both novice and experienced cactus enthusiasts. Here are the key aspects of its care:

• Soil: Like most cacti, TBM Clone A requires a well-draining soil mix to prevent root rot. A commercially available cactus and succulent mix amended with extra perlite or pumice is ideal. A good ratio is approximately 70% inorganic material to 30% organic material.

• Watering: This cultivar tends to appreciate more water than many other succulent species, especially during its active growing season in the spring and summer. However, it is crucial to allow the soil to dry out completely between waterings. Overwatering, particularly in cooler months, can lead to fungal infections.

   

• Light: TBM Clone A thrives in full sun to light shade. When grown outdoors in hot climates, some protection from the intense afternoon sun can prevent scorching. If cultivated indoors, it requires a bright, sunny location.

• Temperature: This cactus is relatively cold-hardy and can tolerate brief drops in temperature. However, it should be protected from frost.

• Fertilizing: During the growing season, a balanced, low-nitrogen fertilizer diluted to half-strength can be applied monthly to encourage healthy growth.

Propagation

Propagation of TBM Clone A is exclusively done through cuttings to ensure the resulting plants are genetically identical to the parent. To propagate:

1. Take a cutting from a healthy, established plant, ensuring the cutting includes at least one areole, as new growth will emerge from these points.

2. Allow the cut end of the cactus to callus over for a week or more in a dry, well-ventilated area. This helps to prevent rot when the cutting is planted.

3. Once calloused, the cutting can be planted in a well-draining cactus mix.

4. Water sparingly until roots have formed, which can take several weeks to a few months.

Common Issues

The most common problem affecting TBM Clone A is susceptibility to fungal infections, which often manifest as black or orange spots on the cactus's skin. These issues are typically caused by overwatering, high humidity, or poor air circulation. Providing a well-draining soil mix, watering appropriately, and ensuring good airflow can help prevent these problems.

In summary, TBM Clone A is a fascinating and visually striking cactus that offers a unique alternative to the more common TBM Clone B. Its columnar, monstrose growth and relatively easy care make it a rewarding addition to any cactus collection.