Trailing Begonia

Basic Information

Common Name: Trailing Begonia

Scientific Name: Begonia glabra

Native Habitat: Central and South America

History / Discovery / Cultivator

Begonia glabra, commonly known as the Trailing Begonia, boasts a history rooted in the tropical regions of Central and South America. Its discovery and subsequent introduction to the world of horticulture remain somewhat obscure, lacking a definitive record of the exact individual or team responsible for its initial collection and classification. However, given its native habitat spanning a diverse geographical area, it is likely that several botanists and plant explorers encountered the species independently over time.

The genus Begonia itself is named after Michel Bégon, a French naval officer and patron of botany, by Charles Plumier, a French botanist and monk, in the late 17th century. While Plumier’s work focused on other Begonia species, the recognition of the genus as a whole paved the way for the eventual identification and categorization of Begonia glabra. The “glabra” epithet in its scientific name refers to its smooth or hairless (glabrous) foliage, a key characteristic that distinguishes it from other Begonia species.

The cultivation of Begonia glabra as a houseplant likely began in the 20th century, as interest in ornamental foliage and exotic plants grew. Its attractive trailing habit and relatively easy care requirements made it a desirable addition to indoor collections. The plant’s adaptability to indoor environments, coupled with its ability to produce delicate white or pink flowers under optimal conditions, further enhanced its popularity. While no single individual can be credited with its widespread cultivation, various nurseries and horticultural societies played a significant role in propagating and distributing the plant to enthusiasts around the world.

The Begonia glabra is an epiphytic plant, which means that in its native environment it grows upon other plants rather than in the soil. This means that it needs to be provided with a well-draining growing media and shouldn’t sit in water. Their leaves are generally a glossy green and the plant will develop into a dense, trailing display if properly cared for. As a popular choice for growing in hanging baskets, Begonia glabra are also used for adding a textural background to other focal displays that enjoy similar growing conditions.

Over time, Begonia glabra has become a popular choice for both novice and experienced plant enthusiasts. Its resilience, coupled with its aesthetic appeal, ensures its continued presence in homes and gardens worldwide. The relative ease of propagation has allowed the plant to be spread across the globe, where its growth has established the begonia as a staple of global plant keeping culture.

As with most Begonia species, Begonia glabra is highly susceptible to root rot if it gets overwatered so extra care must be taken to ensure that the soil has dried out between watering sessions.

Plant Care Summary

Botanical Insights

Adaptations

As an epiphyte in its native tropical environment, Begonia glabra has adapted to thrive in shaded, humid conditions. Its trailing growth habit allows it to cascade down trees or rocks, maximizing its access to light in the dense understory. Its relatively thin leaves are efficient at capturing diffused light. It also benefits from the additional humidity, which makes it an ideal candidate for container growing or in a greenhouse.

Propagation Methods

Begonia glabra is most commonly propagated via stem cuttings. Take a cutting with several nodes, remove the lower leaves, and place it in water or directly into a well-draining potting mix. Keep the cutting in a humid environment until roots develop. Alternatively, leaf cuttings can also be successful. Place a leaf cutting on a moist substrate, and new plantlets will form at the cut edges.

Toxicology

Begonia glabra contains soluble calcium oxalates, which are toxic to both humans and pets if ingested. The oxalates can cause oral irritation, excessive salivation, vomiting, and difficulty swallowing. In pets, more severe symptoms such as kidney failure are possible but less likely. It’s best to keep the plant out of reach of children and pets. If ingestion is suspected, contact a medical professional or veterinarian immediately.

Common Problems

Pests:

• Mealybugs
• Spider Mites
• Aphids

Diseases:

• Root Rot
• Powdery Mildew
• Botrytis Blight

Other:

• Leaf Drop: Often caused by overwatering, underwatering, or sudden temperature changes.
• Yellowing Leaves: Can be caused by nutrient deficiencies or improper lighting.
• Leggy Growth: Insufficient light can cause the plant to become leggy and stretched.

Rarity & Value

Rarity:

Begonia glabra isn’t considered extremely rare, but it might not be as widely available as some of the more common Begonia varieties. Its epiphytic nature means it requires specific conditions for optimal growth, leading to slightly lower propagation rates compared to more common Begonias. Specific variegation or unusual leaf forms may command a higher price and increase the plant’s overall rarity.

Value:

Several factors influence the value of a Begonia glabra specimen. Larger, more mature plants with well-established trailing growth tend to be more valuable. The overall health and appearance of the plant, including the vibrancy of the foliage and the absence of pests or diseases, also play a significant role. Rare or unique cultivars with distinct variegation can fetch a premium price, especially amongst dedicated collectors. Current trends and popularity within the plant community also affect market value.