Discover the mesmerizing begonia erythrophylla 'Black Fang' with its velvety dark green leaves and vibrant red undersides. Learn how to care for this stunning house plant, including light requirements, watering tips, potting and soil recommendations, and pruning techniques. Find out how to propagate this begonia through leaf cuttings and add this unique plant to your indoor collection. Happy gardening!


Are you looking for unique and stunning house plants to add to your indoor collection? Look no further than the begonia erythrophylla ‘Black Fang.’ This striking variety of begonia is known for its dark, velvety leaves and eye-catching red undersides. In this article, we will explore the characteristics, care instructions, and propagation methods for the begonia erythrophylla ‘Black Fang.’ Whether you are a seasoned plant enthusiast or a beginner gardener, this guide will help you successfully grow and care for this beautiful house plant.

Characteristics of the Begonia Erythrophylla ‘Black Fang’

The begonia erythrophylla ‘Black Fang’ is a rhizomatous begonia, which means it grows from an underground stem called a rhizome. This variety is renowned for its unique foliage, making it a standout addition to any indoor space. The leaves of the ‘Black Fang’ are large, glossy, and deep green, with a velvety texture. The undersides of the leaves are a vibrant red color, creating a stunning contrast.

The ‘Black Fang’ begonia typically reaches a height of 12 to 18 inches and has a bushy growth habit. Its compact size makes it suitable for various locations within the home, from tabletops to shelves. The plant produces clusters of small flowers in shades of pink or white, adding an extra touch of beauty when in bloom.

Care Instructions for the Begonia Erythrophylla ‘Black Fang’

Light Requirements

To ensure the optimal growth of your begonia erythrophylla ‘Black Fang,’ provide it with bright but indirect light. Placing the plant near a window where it can receive filtered sunlight is ideal. Avoid exposing the plant to direct sunlight, as it may cause the leaves to become scorched or damaged. If you choose to grow the plant outdoors, it is essential to offer it some shade during peak sun hours.

When cultivating the ‘Black Fang’ begonia indoors, east-facing windows are ideal for providing mild morning sunlight. This allows the plant to benefit from the gentle rays without the risk of intense midday sun exposure.


Proper watering is crucial to the health of the begonia erythrophylla ‘Black Fang.’ This variety of begonia prefers consistently moist but not waterlogged soil. Water the plant thoroughly, allowing excess water to drain out from the pot’s bottom. It is essential to let the top inch of soil dry out slightly before watering again. Overwatering can lead to root rot and other issues, so be mindful of the plant’s moisture needs.

During the growing season, which typically spans from spring to fall, the ‘Black Fang’ begonia requires more frequent watering. Monitor the moisture level of the soil and adjust your watering schedule accordingly. In winter, when the plant’s growth slows down, reduce the frequency of watering while ensuring the soil does not completely dry out.

Potting and Soil

Choosing the right pot size and soil type is crucial to the overall health and well-being of the begonia erythrophylla ‘Black Fang.’ Select a pot with excellent drainage holes to prevent water from accumulating at the bottom. This will help prevent waterlogged soil, which can lead to root rot.

For soil, use a well-draining potting mix specifically formulated for begonias or use a mix of peat moss, perlite, and compost. This type of soil mixture allows for proper aeration while retaining the moisture level necessary for the plant’s growth.


Like many houseplants, the begonia erythrophylla ‘Black Fang’ benefits from regular fertilization during the growing season. Use a balanced liquid fertilizer diluted to half-strength, and apply it to the plant every two to four weeks. Follow the manufacturer’s instructions regarding the appropriate dosage and frequency.

Fertilizing your ‘Black Fang’ begonia provides it with essential nutrients for healthy growth and vibrant foliage. Be cautious not to over-fertilize, as this can lead to excessive growth or even damage the plant. Always water the soil before fertilizing to prevent direct contact between the fertilizer and the plant’s roots.

Pruning and Maintenance

Pruning is an essential part of maintaining the health and appearance of the begonia erythrophylla ‘Black Fang.’ Regularly inspect the plant for any dead or damaged leaves and stems. These should be removed promptly to prevent the spread of disease or inhibit the growth of healthy foliage.

Pruning also promotes bushier growth and helps maintain the plant’s desired shape and size. To encourage branching, pinch back the tips of the begonia stems. This will stimulate new growth and create a fuller, more compact plant.


The begonia erythrophylla ‘Black Fang’ thrives in temperatures between 60 and 75°F (15-24°C). It is best to keep the plant in a stable environment with mild temperatures. Avoid exposing it to extreme cold or hot conditions, as it can adversely affect its growth and well-being.

Propagation Methods for the Begonia Erythrophylla ‘Black Fang’

While the begonia erythrophylla ‘Black Fang’ can be propagated through various methods, one of the most common approaches is through leaf cuttings. Here’s a step-by-step guide on how to propagate your ‘Black Fang’ begonia:

  1. Select a healthy mature leaf from the parent plant, ensuring it has excellent coloration and does not show signs of disease or damage.
  2. Using a clean, sharp knife or scissors, carefully cut the leaf at its base, near the stem.
  3. Fill a small pot or container with a well-draining potting mix, such as a mixture of peat moss and perlite.
  4. Dip the cut end of the leaf into a rooting hormone powder to stimulate root growth (optional).
  5. Make a small hole in the potting mix and insert the cut end of the leaf into the hole.
  6. Gently press the soil around the base of the leaf to secure it in place.
  7. Mist the cutting with water to provide humidity.
  8. Place the pot or container in a warm, brightly lit area, away from direct sunlight.
  9. Keep the soil slightly moist but avoid overwatering.
  10. After a few weeks to a couple of months, roots should begin to develop, and a new plantlet will emerge.
  11. Once the new plantlet has developed several leaves and a robust root system, it can be transferred to a larger pot or container with a well-draining potting mix.


In conclusion, the begonia erythrophylla ‘Black Fang’ is a stunning variety of house plant with its velvety, dark green leaves and vibrant red undersides. By following the care instructions outlined in this article, you can successfully add this unique begonia to your indoor collection. Remember to provide your ‘Black Fang’ begonia with bright but indirect light, maintain consistent moisture in the soil, and fertilize it during the growing season. Furthermore, regular pruning and proper temperature maintenance will help ensure the health and longevity of this striking house plant. Lastly, if you want to expand your collection or share the beauty of the ‘Black Fang’ begonia with others, you can propagate the plant through leaf cuttings. Happy gardening!


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