Table of Contents
- Introduction
- Understanding Your Begonia Type
- The Best Light for Winter Success
- Mastering Indoor Humidity
- Watering and Feeding in the Winter
- Transitioning Begonias from Outdoors to Indoors
- How to Overwinter Tuberous Begonias
- Simple Troubleshooting for Indoor Begonias
- Growing Rex Begonias as Winter Foliage Plants
- Propagation: A Winter Gardening Project
- Choosing the Right Containers
- Enjoying Your Begonias All Season
- Conclusion
- FAQ
Introduction
Bringing the vibrant colors of your garden inside is one of the most rewarding parts of the changing seasons. Begonias are particularly wonderful for this because their lush foliage and delicate blooms can make any room feel like a tropical retreat. At Longfield Gardens, we love how these versatile plants bridge the gap between the sunny days of summer and the cozy atmosphere of a winter home.
Whether you have been growing begonias in patio containers or garden beds, you may be wondering if you can keep the magic going through the colder months. The short answer is yes, but the method depends entirely on which type of begonia you have. Some varieties will happily bloom on a sunny windowsill all winter, while others require a period of rest to recharge for next spring.
This guide is designed for home gardeners who want to enjoy their begonias year-round. We will walk you through the different types of begonias, their specific winter needs, and the simple steps you can take to keep them healthy. By matching your care to the plant’s natural rhythm, you can ensure your begonias stay beautiful until the warm weather returns.
Understanding Your Begonia Type
Before you bring a plant inside, you need to know which group it belongs to. Begonias are a massive family of plants, and they don't all behave the same way when the temperature drops. Knowing your plant's "personality" is the first step toward winter success. For a broader overview of the family, see All About Begonias.
Cane-Stemmed and Fibrous Begonias
Cane begonias, often called "Angel Wing" begonias, are famous for their tall, bamboo-like stems and wing-shaped leaves. Fibrous begonias include the popular wax begonias often used in bedding displays. Both of these types are "evergreen" in the right conditions. They do not have a natural dormant period, which means they can continue to grow and even flower throughout the winter if they get enough light and warmth.
Rhizomatous Begonias
These plants grow from thick, fleshy stems called rhizomes that creep along the surface of the soil. While they produce lovely sprays of flowers in late winter or early spring, they are mostly grown for their stunning, textured foliage. Rhizomatous begonias are excellent houseplants. They are generally tough and can handle the lower light levels found inside a typical home during the winter months.
Rex Begonias
Rex begonias are the "fancy foliage" members of the family. Their leaves come in incredible swirls of silver, purple, pink, and deep green. Like rhizomatous types, they grow from a rhizome, but they are a bit more sensitive to humidity. They do not go dormant, but they may slow down their growth significantly when the days get shorter.
Tuberous Begonias
This is the group that requires a different approach. Tuberous begonias grow from a thick, potato-like underground structure called a tuber. They produce some of the most spectacular, rose-like flowers in the garden. However, unlike the other types, tuberous begonias must have a winter rest. They cannot be grown as active houseplants through the winter and will naturally begin to die back as the light fades.
Key Takeaway Most begonias can be kept as active houseplants during the winter, but tuberous varieties must go dormant and be stored as dry tubers.
The Best Light for Winter Success
Light is the most important factor when moving a plant from the bright outdoors to the inside of a house. Even a very sunny room is significantly darker than an outdoor garden. To keep your begonias healthy, you need to maximize the light they receive.
During the summer, begonias often prefer filtered light or partial shade to avoid scorched leaves. In the winter, the sun is much lower in the sky and the rays are less intense. You can safely move your plants to a brighter spot than they occupied outdoors. An east-facing or west-facing window is usually ideal. A south-facing window is also great, though you might want a sheer curtain to soften the strongest midday sun if you notice the leaves turning yellow or developing brown spots.
If your home doesn't have much natural light, you can use simple LED grow lights. Placing your begonias under a light for 12 to 14 hours a day can keep them lush and may even encourage cane begonias to keep blooming.
What to do next:
- Identify which windows in your home get the most consistent light.
- Clear away dust from the window glass to let in every bit of sunshine.
- Rotate your pots a quarter-turn every week so the plant grows evenly and doesn't lean toward the glass.
Mastering Indoor Humidity
One of the biggest challenges for begonias indoors is the dry air caused by home heating systems. Most begonias are native to tropical regions where the air is naturally moist. When we turn on the furnace, the humidity level in our homes can drop to levels that are closer to a desert than a jungle. If you want a deeper dive into general indoor care, see How Do You Care for a Begonia Plant Indoors?.
Rex begonias are particularly sensitive to dry air. If the humidity is too low, you may see the edges of the leaves turn brown and crispy. While many people try misting their plants with a spray bottle, this only provides a few minutes of moisture and can actually encourage fungal issues like powdery mildew.
A better solution is to create a "pebble tray." This is a simple, effective way to raise the humidity specifically around your plants. Find a shallow tray and fill it with a layer of decorative pebbles or gravel. Add water to the tray, but keep the water level just below the top of the stones. When you set your begonia pot on the pebbles, the plant stays dry, but as the water evaporates, it creates a small zone of humid air right where the leaves need it most.
Grouping your plants together also helps. As plants "breathe" (a process called transpiration), they release moisture into the air. By keeping your begonias in a cluster, they help keep each other hydrated.
Watering and Feeding in the Winter
In the gardening world, "drainage" simply means how fast water leaves the soil. Begonias have succulent stems that store water, which makes them very sensitive to "wet feet." If the soil stays soggy for too long, the roots can rot, and the plant will quickly decline.
During the winter, plants grow more slowly, and water evaporates more slowly from the soil. This means you will need to water much less frequently than you did during the summer. The best way to tell if your begonia needs water is the "finger test." Stick your finger into the soil up to the first knuckle. If it feels moist, wait a few more days. If the top inch of soil feels dry, it is time for a drink.
When you do water, do it thoroughly until water runs out of the drainage holes at the bottom of the pot. Always empty the saucer afterward so the plant isn't sitting in a pool of water.
As for fertilizer, less is more during the winter. Since the plants aren't growing rapidly, they don't need many extra nutrients. We recommend stopping fertilizer completely in late fall. You can start again in early spring when you see new leaves beginning to emerge. If your begonia is under grow lights and still growing fast, you can use a balanced liquid fertilizer diluted to half-strength once a month.
Key Takeaway Overwatering is the most common cause of trouble for indoor begonias. Always check the soil moisture with your finger before adding more water.
Transitioning Begonias from Outdoors to Indoors
If your begonias have spent the summer on a porch or in the garden, you shouldn't wait until the first frost to bring them inside. Begonias are tropical plants, and even temperatures in the low 40s can cause them stress. It is best to bring them in when night temperatures are still consistently above 50°F. For timing and regional planning, check the Shipping Information.
Before bringing them inside, give your plants a thorough inspection. Check the undersides of leaves and the joints of the stems for any hitchhiking pests like aphids or spider mites. A gentle spray of water can knock off most visitors.
It is also a good idea to trim back your plants. For cane begonias, you can cut them back by about a third to make them more manageable and to encourage bushier growth. These trimmings don't have to go to waste—begonias are very easy to grow from cuttings, so you can start new baby plants to share with friends.
Acclimatization Steps:
- Bring plants inside for a few hours a day over the course of a week to get them used to the lower light and humidity.
- Clean the pots with a damp cloth to ensure no garden soil or insects are brought into your living space.
- Remove any dead or yellowing leaves to improve airflow around the plant.
How to Overwinter Tuberous Begonias
If you have tuberous begonias, you cannot keep them growing as houseplants. They have a biological "clock" that tells them they need to rest. If you try to force them to grow through the winter, they will eventually become weak and may not survive. For more on saving tubers for another season, see Tips for Growing Tuberous Begonias.
The process of "overwintering" these tubers is simple and very effective. In the late fall, as the days shorten and the weather cools, you will notice the leaves starting to turn yellow and the stems becoming brittle. This is your signal to stop watering.
Once the soil has dried out completely and the top growth has withered, you can gently dig up the tubers. Shake off the excess soil and cut the stems back to about an inch above the tuber. Place the tubers in a cool, dry, and airy spot for a few days to "cure." This just means the outer skin dries out and hardens, which helps prevent rot during storage.
After curing, store the tubers in a box filled with dry peat moss, vermiculite, or sawdust. Keep the box in a cool, dark place that stays between 40°F and 50°F—a basement or an unheated closet works perfectly. Check on them once a month to make sure they aren't shriveling or rotting. In early spring, you can bring them back into the light and start watering again to wake them up. If you plan to start them early indoors, How to Start Tuberous Begonias Indoors is a helpful next step.
Simple Troubleshooting for Indoor Begonias
Even with the best care, you might notice a few changes in your begonias as they adapt to life indoors. Most of these are easy to fix if you know what to look for.
If you see leaves dropping, don't panic. This is often just a sign of "shock" as the plant moves from one environment to another. As long as there is new growth at the tips, the plant is likely just adjusting to the lower light.
Yellow leaves are usually a sign of too much water. If you notice yellowing, let the soil dry out more than usual before your next watering. On the other hand, if the leaves are curling or the edges are brown, the plant is likely too dry or the humidity is too low.
Mildew can occasionally appear as white, fuzzy spots on the leaves. This usually happens when the air is too stagnant or the leaves are getting wet. Improve the airflow in the room by using a small fan (don't point it directly at the plant) and ensure you are only watering the soil, not the foliage.
What to do next:
- Check your plants weekly for any signs of yellowing or drooping.
- Adjust your watering schedule based on how the soil feels, not based on the calendar.
- Make sure your plants aren't sitting in a cold draft from a door or window.
Growing Rex Begonias as Winter Foliage Plants
Rex begonias are stars of the winter windowsill. While other plants might stop blooming, Rex begonias keep their colorful foliage all year long. Because they are grown for their leaves rather than their flowers, they are perfect for adding a pop of color to your home when it is gray outside. If you want more support for choosing the right seasonal timing, the Hardiness Zone Map can help.
Because Rex begonias grow from a rhizome, they have a shallow root system. They prefer wide, shallow pots rather than deep ones. This also helps prevent the soil at the bottom of the pot from staying too wet.
To keep a Rex begonia looking its best in the winter, focus on high humidity and consistent moisture. They don't like to dry out quite as much as cane begonias, but they still don't want to be soggy. If the plant looks a bit "tired" in January, it is likely just waiting for the longer days of spring. Avoid the temptation to over-fertilize it to make it grow; instead, just provide steady care and wait for the light to return.
Key Takeaway Rex begonias provide incredible winter color through their foliage, provided you maintain a humid environment and avoid soggy soil.
Propagation: A Winter Gardening Project
Winter is a great time to experiment with begonia propagation. Since you are spending more time indoors, you can keep a close eye on your cuttings. It is an easy way to turn one favorite plant into several new ones for the next growing season. If you are looking for a broader indoor-growing overview, Can Begonias Be Indoor Plants? is a useful companion guide.
Cane-stemmed begonias are very simple to root in water. Cut a stem that is about 4 to 6 inches long, making sure it has at least two "nodes" (the bumps on the stem where leaves grow). Remove the lower leaves and place the stem in a glass of clean water. In a few weeks, you will see white roots emerging. Once the roots are an inch or two long, you can plant the cutting in a small pot with fresh potting soil.
Rex and rhizomatous begonias can be grown from leaf cuttings. You can take a single healthy leaf, cut the stem (petiole) to about an inch, and tuck it into a pot of moist, seed-starting mix. Cover the pot with a clear plastic bag to keep the humidity high, and in a month or two, tiny new plantlets will appear at the base of the leaf.
Propagation Tips:
- Use a clean, sharp knife or scissors to prevent crushing the stems.
- Change the water in your rooting jars every few days to keep it fresh.
- Keep your cuttings in a warm, bright spot but out of direct, hot sun.
Choosing the Right Containers
When you bring begonias indoors, the type of pot you use makes a difference. Terracotta or clay pots are excellent because they are "breathable." They allow air to reach the roots and help excess moisture evaporate through the walls of the pot. This is a great safeguard against overwatering. For more container-specific guidance, see Can You Plant Begonias in a Pot?.
Plastic or glazed ceramic pots hold onto moisture for much longer. These are fine to use, but you must be extra careful with your watering. Regardless of the material, your pot must have a drainage hole. Without one, water will collect at the bottom, leading to root rot.
If you have a beautiful decorative "cachepot" that doesn't have a hole, don't plant directly in it. Instead, keep the begonia in a plain plastic nursery pot with holes and set that inside the decorative container. When it's time to water, take the plastic pot to the sink, let it drain completely, and then put it back in its decorative home.
Enjoying Your Begonias All Season
Gardening doesn't have to stop just because there is snow on the ground or the temperatures have dipped. By bringing your begonias inside, you get to enjoy their unique beauty up close. Watching a new, spiraled Rex begonia leaf unfurl or seeing a cluster of pink flowers on an Angel Wing begonia can be a wonderful highlight of the winter months.
Remember that gardening is a learning process. Every home has its own microclimate—some are warmer, some are darker, and some are drier. Pay attention to how your plants respond to their new environment. If a plant isn't happy in one window, try moving it to another.
At Longfield Gardens, we believe that success comes from understanding what each plant needs to thrive. With a little attention to light, humidity, and proper watering, your begonias will not only survive the winter but will be ready to burst into growth as soon as the spring sun returns.
Key Takeaway Matching your begonia's care to its type is the secret to winter success. Cane and Rex types love bright, humid spots, while tuberous types prefer a dry, cool rest.
Conclusion
Growing begonias indoors in the winter is an achievable and rewarding project for any gardener. By distinguishing between the types that stay evergreen and the tuberous ones that need a nap, you can provide the exact care your plants require. Focus on providing bright light, maintaining humidity without soaking the soil, and letting the plants rest when growth slows down.
- Identify your begonia type to determine if it needs a dormant period.
- Maximize winter light by placing plants in east or south-facing windows.
- Use pebble trays to boost humidity and keep leaves healthy.
- Water only when the top inch of soil feels dry to the touch.
Longfield Gardens is here to support your journey in creating a more beautiful home and garden, no matter the season. With a few simple adjustments, your begonias will remain a source of joy and color all year long.
FAQ
Do all begonias go dormant in the winter?
No, only tuberous begonias require a dormant period. Cane-stemmed, wax, rhizomatous, and Rex begonias can be grown as active houseplants throughout the winter as long as they receive adequate light and warmth.
Why are my begonia's leaves turning brown and crispy on the edges?
This is usually a sign of low humidity. Indoor heating dries out the air, which can stress begonias—especially Rex varieties. Using a pebble tray or grouping plants together can help increase the moisture in the air.
Can I keep my begonias in their outdoor pots for the winter?
Yes, you can bring the entire pot indoors. However, it is a good idea to inspect the plant for pests and perhaps refresh the top layer of soil. Ensure the pot has a drainage hole to prevent water from sitting at the bottom.
How often should I water my begonia during the winter?
There is no set schedule, as it depends on your home’s temperature and humidity. Use the "finger test" and only water when the top inch of soil feels dry. You will likely find yourself watering much less often than you did during the summer.