Rex Begonia

How to Grow and Care for Rex Begonia: A Comprehensive Guide

Learn how to grow and care for Rex Begonia in this informative guide. Discover essential tips, insights, and FAQs for nurturing these beautiful plants.


Rex Begonias, with their mesmerizing foliage and vibrant colors, have become a favorite among houseplant enthusiasts. If you’re looking to add a touch of elegance to your indoor garden, you’ve come to the right place. In this comprehensive guide, we’ll explore everything you need to know about how to grow and care for Rex Begonia. From choosing the right potting mix to troubleshooting common issues, we’ve got you covered.

Rex Begonia

Rex Begonia Taxonomy

  • Kingdom: Plantae
  • Phylum: Angiosperms
  • Class: Eudicots
  • Order: Cucurbitales
  • Family: Begoniaceae
  • Genus: Begonia
  • Species: Begonia rex

Rex Begonia belongs to the family Begoniaceae, and it is known for its stunning and ornamental foliage. Within the genus Begonia, there are numerous species and cultivars, each with its unique characteristics and leaf patterns. These plants are highly valued for their vibrant and intricate leaves, making them a popular choice among indoor gardeners and plant enthusiasts.

Selecting the Perfect Rex Begonia

Rex Begonia

Before embarking on your journey of growing Rex Begonias, it is absolutely crucial to select a healthy plant as your starting point. The quality of the plant you choose will greatly influence its growth and overall vitality. Here are some key steps to follow when selecting the perfect Rex Begonia for your indoor garden:

  • Leaf Health: Begin by closely examining the leaves of the Begonia plant. Healthy Rex Begonia leaves should be vibrant, lustrous, and free from any blemishes or discoloration. They come in a dazzling array of colors and patterns, so look for leaves that match the variety you desire.
  • Leaf Shape: Rex Begonias are known for their distinct and captivating leaf shapes, which can vary widely between different cultivars. Ensure that the leaves are well-formed and have the characteristic shape associated with the specific variety you intend to grow.
  • Pest and Disease Inspection: Carefully inspect the entire plant, paying special attention to the undersides of the leaves and the areas where leaves meet stems. Look out for any signs of pests such as tiny webs (indicating spider mites) or cottony clusters (indicating mealybugs). Additionally, check for any symptoms of diseases, like discolored or rotting areas on the leaves.
  • Root Health: Although you may not be able to see the roots initially, you can gently tip the plant out of its pot to check the root system. Healthy roots should be white or cream-colored, firm, and not overly crowded in the pot. Avoid plants with mushy, brown, or damaged roots.
  • Overall Vigor: Consider the overall appearance and vigor of the plant. A healthy Rex Begonia should exhibit an energetic and robust appearance, with plenty of new growth and a compact, well-balanced form.
  • Avoid Stress Signs: Watch out for any signs of stress, such as wilting, drooping leaves, or yellowing. Stress can be an indication of poor care or health issues.
  • Varietal Specifics: Rex Begonias come in a wide range of varieties, each with its unique features. If you have a particular variety in mind, make sure the plant you choose matches the characteristics of that variety.
Rex Begonia

Potting Mix and Container

Choosing the right potting mix and container is a crucial step in ensuring the healthy growth of your Rex Begonia. These plants have specific needs when it comes to soil and pots, so let’s delve into the details.

Potting Mix:

Rex Begonias thrive in a well-draining potting mix. This is because they are sensitive to overwatering, and having proper drainage is essential to prevent root rot. Here’s a mix recipe that works exceptionally well for Rex Begonias:

  • Peat Moss: Peat moss is an excellent choice for retaining moisture while allowing excess water to drain away. It also provides some acidity to the soil, which many Rex Begonias prefer.
  • Perlite: Perlite is a lightweight, porous material that enhances drainage. It helps keep the soil loose and airy, preventing it from becoming compacted over time.
  • Compost: Adding a small amount of well-rotted compost to the mix enriches the soil with essential nutrients. However, be cautious not to overdo it, as Rex Begonias don’t like overly rich soil.

Mix these components in equal parts to create a well-balanced potting mix for your Rex Begonia. You can adjust the ratio slightly based on your specific conditions, but the key is to maintain good drainage.


Equally important as the potting mix is the choice of the container for your Rex Begonia. Here are some container considerations:

  • Drainage Holes: Always select a pot with drainage holes at the bottom. This allows excess water to escape, preventing waterlogging and root suffocation. Without drainage, your Rex Begonia may develop root problems.
  • Size: Choose a pot that accommodates the size of your Rex Begonia. It should provide enough room for the plant to grow, but not be excessively large. A pot that’s slightly larger than the root ball is ideal.
  • Material: Common pot materials include clay, ceramic, plastic, and terracotta. Each has its advantages, but what’s most important is that the container has drainage holes. You can choose the material that suits your aesthetic preferences.
  • Saucer: Consider placing a saucer or tray under the pot to catch excess water that drains out. This prevents water from damaging surfaces and allows the plant to absorb any excess moisture as needed.

Ideal Lighting Conditions

Getting the lighting conditions right is paramount when it comes to caring for your Rex Begonias. These stunning plants have specific preferences, and understanding their lighting requirements is essential for their well-being.

Bright, Indirect Light:

Rex Begonias are known for their stunning, delicate leaves, and they thrive in bright, indirect light. Here’s what you need to know:

  • Bright Light: Place your Rex Begonia in a location where it receives bright, but not direct, sunlight. Think of the soft, dappled light that filters through a curtain or blinds. This indirect sunlight mimics the conditions these plants encounter in their native habitat, the forest floor.
  • Avoid Direct Sunlight: One crucial thing to remember is to avoid exposing your Rex Begonia to direct sunlight. Direct sun can be too intense and scorch the delicate leaves, causing irreparable damage. It’s best to shield them from the harsh midday sun.
  • Filtered Sunlight: Ideal locations include spots near a window with sheer curtains or where the sunlight is filtered through trees or other plants. These conditions provide the gentle, diffused light that Rex Begonias adore.

Light Duration:

Rex Begonias have a natural rhythm, and they benefit from a consistent light schedule. Aim for around 12 hours of light per day to keep your plant healthy and happy. You can achieve this by placing your Begonia in a room with a steady source of indirect light or by using artificial grow lights if natural light is insufficient.

Adjusting Light Levels:

Keep an eye on your Rex Begonia’s response to light. If you notice its leaves becoming pale or leggy, it may indicate that it’s not receiving enough light. On the other hand, if the leaves start to scorch or show signs of stress, it’s receiving too much direct light. Adjust the plant’s placement accordingly to find the perfect balance.

Watering Rex Begonias

Properly managing the moisture levels for your Rex Begonias is a vital aspect of their care. These plants have specific needs when it comes to watering, and finding the right balance is key to their well-being.

Consistently Moist Soil:

Rex Begonias prefer their soil to be consistently moist but not waterlogged. Here’s how to achieve this:

  • Check the Top Inch: To determine when it’s time to water, insert your finger or a wooden stick into the soil about an inch deep. When the top inch of soil feels dry to the touch, it’s a good indication that your Rex Begonia is ready for a drink.
  • Water Thoroughly: When you do water, make sure to do so thoroughly. Water the plant until you see water escaping through the drainage holes at the bottom of the pot. This ensures that the entire root system receives moisture.

Avoid Overwatering:

One of the most common mistakes in Rex Begonia care is overwatering. Here’s why it’s crucial to avoid:

  • Root Rot Risk: Overwatering can lead to a condition known as root rot, where the roots suffocate due to excess moisture. This can severely harm your plant and, if left unchecked, can be fatal.
  • Signs of Overwatering: Be vigilant for signs of overwatering, such as yellowing leaves, wilting, or a foul smell from the soil. If you notice any of these symptoms, reduce your watering frequency immediately.
  • Well-Draining Soil: As mentioned earlier, using a well-draining potting mix that includes materials like perlite and peat moss helps prevent water from pooling in the soil, reducing the risk of overwatering.

Watering Frequency:

The frequency of watering can vary based on factors like the size of the pot, humidity levels in your home, and the time of year. During the growing season (spring and summer), Rex Begonias typically need more frequent watering. In contrast, during the dormant season (fall and winter), they require less moisture.

Additional Tips:

  • Use Room Temperature Water: It’s best to water your Rex Begonia with room temperature water. Avoid using water that’s too cold, as it can shock the plant.
  • Humidity Matters: Rex Begonias appreciate higher humidity levels. If you live in a dry climate or during the winter months when indoor air tends to be dry, consider using a humidity tray or a room humidifier to maintain adequate moisture in the air around your plant.

Propagating Rex Begonias

Propagating Rex Begonias is not only an exciting gardening adventure but also a fantastic way to expand your collection of these captivating plants or share their beauty with friends and fellow plant enthusiasts. These unique and stunning houseplants can be easily propagated through various methods, allowing you to create new plants from your existing ones. Here, we’ll explore two popular methods for propagating Rex Begonias: leaf cuttings and division.

1. Leaf Cuttings:

Leaf cuttings are a popular and straightforward way to propagate Rex Begonias. Here’s how to do it:

  • Select a Healthy Leaf: Start by choosing a healthy Rex Begonia leaf. Look for one that is free from damage or disease and is fully mature.
  • Cut the Leaf: Using a sharp, clean pair of scissors or a knife, carefully cut the leaf into sections, ensuring that each section has a prominent vein running through it. These sections will serve as the basis for new plants.
  • Plant the Sections: Plant the leaf sections, vein side down, into a pot filled with a well-draining potting mix. Make sure to bury them just below the soil’s surface.
  • Maintain Moisture: Keep the soil consistently moist but not waterlogged. Cover the pot with a plastic bag or a plastic dome to create a humid environment for the cuttings. This encourages root development.
  • Watch for Growth: Over time, the leaf cuttings will develop roots and eventually sprout new leaves. Once they have established roots and are growing well, you can transplant them into their individual pots.

2. Division:

Division is another effective way to propagate Rex Begonias, especially for mature plants that have outgrown their pots. Here’s how to do it:

  • Remove the Plant: Carefully remove the mature Rex Begonia from its pot. Gently shake off excess soil to expose the root system.
  • Divide the Plant: Examine the roots and locate natural divisions or sections where the plant can be separated into smaller, individual plants. Each section should have roots and healthy stems.
  • Replant: Plant each divided section in its own pot, using a well-draining potting mix. Ensure that the roots are adequately covered with soil.
  • Water and Care: Water the newly potted divisions thoroughly and keep them in a location with bright, indirect light. Continue to care for them as you would for mature Rex Begonias.

Leaf Cuttings

One of the most common and effective methods for propagating Rex Begonias is through leaf cuttings. This straightforward process allows you to create new plants from a single healthy leaf, making it an excellent choice for expanding your collection or sharing the beauty of Rex Begonias with others. Here’s a step-by-step guide on how to propagate Rex Begonias using leaf cuttings:

1. Gather Your Materials:

Before you begin, make sure you have the following materials ready:

  • Healthy Rex Begonia Leaf: Choose a mature and healthy leaf from your Rex Begonia plant. Ensure that it is free from damage or disease.
  • Sharp, Clean Scissors or Knife: You’ll need a clean cutting tool to make precise cuts on the leaf.
  • Pot with Well-Draining Potting Mix: Prepare a small pot filled with the same well-draining potting mix that your mature Rex Begonia is planted in.
  • Small Plastic Bags or Plastic Dome: These will be used to create a humid environment for the leaf cuttings.

2. Cut the Leaf:

Using your sharp scissors or knife, carefully cut the selected leaf into sections. Each section should be about 2 to 3 inches long and should include a portion of the leaf’s central vein. The central vein is crucial for root development.

3. Plant the Leaf Cuttings:

Insert each leaf section, with the cut end facing downward, into the prepared pot with well-draining potting mix. You can plant multiple sections in the same pot, spacing them apart to allow room for growth.

4. Create a Humid Environment:

To encourage root development and maintain humidity, cover the pot with small plastic bags or use a plastic dome. This will help create a mini-greenhouse effect, keeping the environment moist and ideal for rooting.

5. Keep the Soil Moist:

Consistently moist soil is essential for successful rooting. Check the soil regularly and water it when it starts to dry out. Be careful not to overwater, as soggy soil can lead to issues such as root rot.

6. Provide Indirect Light:

Place the pot with the leaf cuttings in a location with bright, indirect light. Avoid direct sunlight, as it can be too harsh for the delicate cuttings.

7. Be Patient:

Propagation through leaf cuttings takes time. It may take several weeks to several months for the cuttings to develop roots and new growth. During this period, continue to monitor moisture levels and provide the right environmental conditions.

8. Transplanting:

Once the leaf cuttings have established roots and are showing signs of new growth, you can transplant them into individual pots with well-draining potting mix. Treat them as you would mature Rex Begonias.


Propagation by division is a straightforward and effective way to create new Rex Begonia plants from mature ones. This method is particularly useful when your mature Rex Begonia has outgrown its current container or you wish to share the beauty of these plants with others. Here’s a step-by-step guide on how to propagate Rex Begonias through division:

1. Gather Your Materials:

Before you start the division process, ensure that you have the necessary materials ready:

  • Mature Rex Begonia Plant: Select a mature Rex Begonia plant that you intend to propagate. Ideally, the plant should be healthy and thriving.
  • New Pots with Well-Draining Potting Mix: Prepare individual pots for each divided section. Use the same well-draining potting mix that you use for your mature Rex Begonia.
  • Gardening Tools: You may need a trowel, gardening gloves, and a clean, sharp knife or scissors for cutting.

2. Remove the Plant from Its Container:

Gently remove the mature Rex Begonia from its current container. This can usually be done by tipping the pot on its side and carefully coaxing the plant out. Be gentle to avoid damaging the roots or stems.

3. Separate the Root Ball:

Inspect the root ball of the mature plant. Look for natural divisions or sections where the plant can be divided into smaller parts. Each section should have both roots and healthy stems.

4. Cut or Pull Apart:

Depending on the size and strength of the root ball, you can use a clean, sharp knife or scissors to cut it into sections, or you can gently pull apart the sections by hand. Be cautious and avoid damaging the roots or stems during this process.

5. Replant in Individual Pots:

Plant each divided section in its own individual pot, using the same well-draining potting mix that your mature Rex Begonia is accustomed to. Ensure that the roots are adequately covered with soil.

6. Water and Care:

After transplanting, water the newly potted divisions thoroughly. Keep them in a location with bright, indirect light, similar to the conditions your mature Rex Begonia prefers. Continue to care for them as you would for mature Rex Begonias, ensuring consistent moisture and appropriate humidity levels.

7. Be Patient:

Propagation by division may take some time for the divided sections to establish themselves and begin new growth. Be patient and provide the necessary care and attention as they adapt to their new pots.

Troubleshooting Common Issues

While Rex Begonias are known for their captivating beauty, they can encounter issues from time to time. Even with the best care, you may face challenges. Here are some common problems that can occur when growing Rex Begonias and how to address them:

1. Yellowing Leaves:

Issue: Yellow leaves on your Rex Begonia can be concerning, but they often signal a specific problem.

Solution: Yellowing leaves are often a sign of overwatering. To address this issue:

  • Check the Soil: Ensure that the potting mix you’re using is well-draining. Rex Begonias dislike sitting in soggy soil, which can lead to root rot.
  • Adjust Your Watering Routine: Water your Rex Begonia when the top inch of soil feels dry to the touch. Avoid letting the plant sit in a saucer filled with excess water, as this can contribute to overwatering.

2. Leaf Browning:

Issue: Browning or scorched-looking leaves can occur if your Rex Begonia is exposed to too much direct sunlight.

Solution: To prevent leaf browning:

  • Relocate the Plant: Move your Rex Begonia to a shadier spot with bright, indirect light. These plants thrive in filtered sunlight and can’t tolerate direct sun on their delicate leaves.
  • Use Curtains or Blinds: If your plant is near a window with direct sunlight, consider using sheer curtains or blinds to filter the light.

3. Pests and Diseases:

Issue: Rex Begonias can be susceptible to common indoor plant pests like mealybugs and spider mites, as well as diseases.

Solution: To combat pests and diseases:

  • Regular Inspections: Regularly inspect your Rex Begonia for any signs of pests, such as tiny webs, cottony clusters, or discolored leaves. Early detection is crucial.
  • Isolate Infected Plants: If you identify any pests or diseases, isolate the affected plant to prevent them from spreading to other plants in your collection.
  • Treatment: Treat infestations promptly. You can use natural remedies like neem oil or insecticidal soap to combat pests. For diseases, consider pruning and removing affected parts of the plant and adjusting your care routine to prevent further issues.

FAQs (Frequently Asked Questions)

What are Rex Begonias, and what makes them unique?

Rex Begonias, scientifically known as Begonia rex, are a group of strikingly beautiful and diverse indoor plants cherished for their remarkable foliage. Unlike many other houseplants, Rex Begonias are primarily grown for their leaves rather than their flowers. These leaves display an astonishing array of colors, patterns, and shapes, making them a true standout in the world of indoor gardening.

How do I choose the perfect location for my Rex Begonia?

To thrive, Rex Begonias require bright, indirect light. Avoid exposing them to direct sunlight, as it can damage their delicate leaves. Ideal locations include areas near windows with filtered sunlight or spots where light is gently diffused through sheer curtains.

What is the best potting mix for Rex Begonias?

Rex Begonias thrive in a well-draining potting mix that provides adequate moisture retention. A mix of peat moss, perlite, and compost is an excellent choice. Ensure that the pot you use has drainage holes to prevent waterlogging.

How often should I water my Rex Begonia?

Keep the soil consistently moist but not soggy. Water your Rex Begonia when the top inch of soil feels dry to the touch. Avoid overwatering, as it can lead to root rot.

Should I fertilize my Rex Begonia, and if so, how often?

Yes, fertilizing is essential for Rex Begonias. During the growing season (spring and summer), fertilize your plant every 2-4 weeks with a balanced liquid fertilizer. Reduce or stop fertilizing during the dormant season (fall and winter).

Can I propagate my Rex Begonia, and if so, how?

Yes, Rex Begonias can be propagated through methods such as leaf cuttings and division. Leaf cuttings involve cutting a healthy leaf into sections and planting them to develop new plants. Division entails separating mature plants into sections with roots and stems, which can be replanted individually.

What are the common issues I might encounter when caring for Rex Begonias?

Common issues include yellowing leaves due to overwatering, leaf browning from too much direct sunlight, and potential infestations by pests like mealybugs and spider mites. Regularly inspect your plant and adjust care accordingly to address these concerns.

How can I enhance the humidity for my Rex Begonia?

Rex Begonias appreciate higher humidity levels. You can increase humidity by using a humidity tray, placing a room humidifier nearby, or misting the plant regularly. These measures help recreate the tropical conditions they thrive in.

Can I keep Rex Begonias outdoors?

Rex Begonias are primarily indoor plants and prefer stable indoor conditions. However, in mild climates, you can place them in shaded outdoor areas during the warmer months, provided they are protected from direct sunlight and harsh weather conditions.

What is the lifespan of a Rex Begonia, and how can I ensure its longevity?

With proper care, Rex Begonias can live for several years. To ensure their longevity, maintain appropriate lighting, humidity, watering, and fertilizing routines. Regularly inspect for pests and address any issues promptly to keep your Rex Begonia healthy and vibrant for years to come.

Are there different varieties of Rex Begonias, and how do I choose the right one for my space?

Yes, there are numerous varieties of Rex Begonias, each with its unique leaf colors, patterns, and shapes. When choosing a variety, consider your space’s lighting conditions and your personal aesthetic preferences. Some Rex Begonias thrive in lower light, while others require more indirect sunlight.

Do Rex Begonias produce flowers, and are they as remarkable as their leaves?

Rex Begonias are primarily grown for their foliage, and their flowers are often less showy compared to other Begonia species. While they do produce small clusters of blooms, the real star of the show remains their stunning leaves. If you do wish to encourage flowering, provide the plant with bright, indirect light and the right care conditions.

To create an eye-catching display, consider grouping different Rex Begonia varieties together. The contrasting colors and patterns of their leaves can create a captivating visual spectacle. Place them in decorative pots or containers that complement their unique beauty.

What are some signs that my Rex Begonia is not thriving, and how can I revive it?

Signs of a struggling Rex Begonia include wilting, yellowing leaves, or slowed growth. To revive your plant, assess its care routine. Ensure it’s getting the right amount of light, moisture, and humidity. Trim any damaged leaves, repot if necessary, and treat any pest or disease issues promptly.

Can I share Rex Begonias with other plant enthusiasts?

Absolutely! Rex Begonias make excellent gifts for fellow plant lovers. You can propagate them through leaf cuttings or division, as discussed earlier, and share the joy of these unique houseplants with friends and family.

Are there any specific companion plants that pair well with Rex Begonias?

Rex Begonias can complement a variety of other indoor plants. Consider pairing them with low-light-loving plants like ferns, snake plants, or peace lilies to create an attractive indoor garden. Ensure that the companion plants have similar care requirements to maintain a harmonious environment.

What are some tips for maintaining the vibrant colors of Rex Begonia leaves?

To keep the leaves of your Rex Begonia vibrant and striking, provide the right lighting conditions (bright, indirect light), maintain adequate humidity levels, and ensure proper watering practices. Avoid exposing the plant to direct sunlight, as this can fade the colors of the leaves over time.

Can I prune my Rex Begonia, and if so, how should I do it?

Yes, you can prune your Rex Begonia to encourage bushier growth and remove any damaged or unsightly leaves. Use clean, sharp scissors or pruning shears to trim the leaves or stems as needed. Ensure that your tools are sanitized to prevent the spread of diseases.


Now that you’ve learned how to grow and care for Rex Begonia, you’re ready to embark on a rewarding plant journey. With the right care, your Rex Begonia will flourish, bringing beauty and vibrancy to your indoor space. Remember to check for our expert tips whenever you need guidance.