Evans’s Hardy Begonia

Basic Information

Common Name: Evans’s Hardy Begonia

Scientific Name: Begonia grandis subsp. evansiana

Native Habitat: China, Japan, Korea

History / Discovery / Cultivator

Begonia grandis subsp. evansiana, commonly known as Evans’s Hardy Begonia, boasts a fascinating history steeped in botanical exploration and horticultural appreciation. Its origins trace back to East Asia, specifically China, Japan, and Korea, where it thrives in moist, shaded environments, often found along stream banks and rocky slopes. The plant’s journey from its native lands to gardens around the world is a testament to its resilience and ornamental appeal.

While the exact details surrounding its initial discovery remain somewhat obscure, it’s believed that the plant was first formally recognized and documented by European botanists during expeditions to East Asia in the 19th century. The subspecies name, “evansiana,” is a tribute to a person named Evans, but the exact individual it commemorates often goes unspecified in historical records. Further investigation would be required to positively identify the eponym.

What is known is that the plant quickly garnered attention for its exceptional hardiness compared to other Begonia species. Most begonias are frost-tender, but Evans’s Hardy Begonia defies this stereotype, capable of withstanding temperatures down to -15°C (5°F) in some cases, provided it is planted in a sheltered location with well-draining soil. This characteristic made it an immediate hit with gardeners in colder climates who longed to grow begonias but were previously limited by their susceptibility to frost.

The popularization of Begonia grandis subsp. evansiana can be attributed to various factors. Firstly, its inherent beauty is undeniable. The plant features attractive, heart-shaped leaves with reddish undersides, adorned with delicate pink or white flowers that bloom in late summer and early autumn. This late bloom time is particularly valuable, as it provides a splash of color when many other garden plants are beginning to fade. Secondly, its ease of propagation contributed to its widespread availability. The plant readily forms bulbils (tiny bulb-like structures) in the leaf axils, which detach and fall to the ground, developing into new plants. This natural method of reproduction makes it easy to propagate and share, further accelerating its distribution among gardeners.

The plant’s ability to self-seed also contributes to its spread. It naturalizes readily, forming colonies in suitable environments. This self-sufficiency is both a blessing and a curse. While some gardeners appreciate its willingness to spread and fill in garden spaces, others may find it too aggressive and require careful management to prevent it from overtaking other plants.

In conclusion, Evans’s Hardy Begonia’s journey from the shaded slopes of East Asia to gardens worldwide is a story of botanical curiosity, horticultural adaptation, and the enduring appeal of a resilient and beautiful plant. Its cold hardiness, combined with its attractive foliage and delicate flowers, has secured its place as a beloved garden staple, appreciated for its ability to bring a touch of exotic beauty to even the most challenging climates.

Plant Care Summary

Botanical Insights

Adaptations

Evans’s Hardy Begonia has several key adaptations that allow it to thrive in its native environment and as a garden plant. One of its most notable adaptations is its cold hardiness, which is unusual for a Begonia species. This is likely due to its evolutionary history in the cooler, temperate regions of East Asia. The plant also produces bulbils in the leaf axils, which serve as a form of vegetative propagation. These bulbils allow the plant to reproduce quickly and efficiently, even in challenging conditions. The reddish undersides of the leaves may offer some protection from herbivores or harsh sunlight. Additionally, its preference for moist, shaded environments is an adaptation to the often-damp and dimly lit conditions of its native forest habitats.

Propagation Methods

Evans’s Hardy Begonia is most commonly propagated through bulbils. These small bulb-like structures form in the leaf axils and naturally detach from the plant. Simply collect the bulbils that have fallen to the ground or gently remove them from the plant and place them on the surface of moist, well-draining soil. Keep the soil consistently moist and provide indirect light. The bulbils will typically root and begin to grow within a few weeks. Division is another effective method. Mature plants can be carefully divided in early spring or fall, ensuring that each division has a healthy root system. Seeds can also be used, although they require specific conditions, including consistent moisture and warmth, to germinate successfully.

Toxicology

Begonia grandis subsp. evansiana contains soluble oxalates, which are considered mildly toxic to both humans and pets. If ingested, these oxalates can cause oral irritation, including a burning sensation in the mouth and throat. In humans, ingestion may also lead to digestive upset, such as nausea, vomiting, and diarrhea, especially if large quantities are consumed. Pets, such as cats and dogs, may experience similar symptoms, including drooling, pawing at the mouth, and loss of appetite. While the plant is not considered deadly, it is best to keep it out of reach of children and pets who are likely to ingest it. If ingestion occurs, it is advisable to rinse the mouth with water and seek medical or veterinary attention if symptoms are severe or persistent.

Common Problems

Pests:

• Mealybugs
• Aphids
• Spider mites

Diseases:

• Powdery mildew
• Root rot
• Leaf spot

Other:

• Leaf yellowing: Often caused by overwatering or poor drainage.
• Leggy growth: Can be a sign of insufficient light.
• Drooping leaves: May indicate underwatering or excessive heat.

Rarity & Value

Rarity:

Evans’s Hardy Begonia is generally not considered rare, as it is relatively easy to propagate and widely available in nurseries and garden centers. However, certain variegated forms or cultivars might be less common and therefore more sought after by collectors. The rarity of specific cultivars can fluctuate based on trends and propagation success.

Value:

The value of Evans’s Hardy Begonia typically depends on its size, health, and aesthetic appeal. A mature, well-established plant with abundant foliage and blooms will generally command a higher price than a small, young plant. Variegated forms or unusual cultivars can also be more valuable, depending on the stability and attractiveness of the variegation. Overall, it is a relatively affordable plant.