Can Begonia Plants Be Brought Indoors?

Table of Contents

1. Introduction
2. Understanding the Different Types of Begonias
3. Bringing Tuberous Begonias Indoors for Dormancy
4. Growing Begonias as Houseplants
5. Caring for Begonias During the Winter
6. Troubleshooting Common Indoor Begonia Issues
7. Moving Begonias Back Outside in Spring
8. The Joy of Multi-Season Gardening
9. FAQ

Introduction

There is a special kind of magic in the way tuberous begonias light up the shady corners of a summer garden. Whether you love the massive, rose-like blooms of tuberous begonias or the metallic, swirling patterns of Rex varieties, these plants are often the highlights of the season. As the air turns crisp and the first hints of autumn arrive, you might find yourself wishing you could bring that beauty inside. The good news is that you absolutely can preserve your begonias to enjoy for years to come.

At Longfield Gardens, we want every gardener to feel confident about keeping their favorite plants healthy through every season. Bringing begonias indoors is a rewarding way to extend your gardening hobby through the winter months. It is a simple process that saves you money and gives you a head start on next year’s display.

This guide will help you identify which begonias are best suited for your windowsill and which ones prefer a winter nap in a cool, dark spot. We will walk you through the easy steps for transitioning your plants from the garden to the living room. By understanding a few basic needs, you can keep your begonias thriving until the warm spring sun returns.

Understanding the Different Types of Begonias

Before you reach for your trowel, it is important to know which type of begonia you are growing. Begonias are a diverse family with thousands of species. In the home garden, we usually deal with three main categories: tuberous, fibrous, and rhizomatous. Each type has a slightly different preference for how it spends the winter.

Tuberous Begonias

Tuberous begonias, such as the popular Nonstop or Illumination series, are famous for their large, spectacular flowers. These plants grow from a thick, potato-like structure called a tuber. In their natural habitat, they have a distinct growing season followed by a period of rest. To keep these begonias healthy, you must allow them to go dormant during the winter. You will not keep these growing as active houseplants. Instead, you will store the tubers in a cool, dry place.

Fibrous and Wax Begonias

Wax begonias are the classic "bedding" begonias often seen in garden borders and hanging baskets. They have fleshy stems and waxy leaves that are either green or bronze. These begonias have fibrous root systems rather than tubers. Unlike tuberous types, wax begonias do not need a dormancy period. You can dig them up, pot them, and enjoy them as blooming houseplants all winter long.

Rex and Rhizomatous Begonias

Rex begonias are grown primarily for their stunning foliage. Their leaves come in shades of silver, purple, pink, and deep burgundy, often with intricate patterns. These plants grow from rhizomes, which are thick stems that creep along the soil surface. Like wax begonias, these do not go dormant. They are very happy to transition into indoor houseplants and can provide incredible color in low-light rooms.

Key Takeaway: Identify your begonia first. Tuberous begonias need to sleep in the winter, while fibrous and Rex begonias can stay awake as houseplants.

Bringing Tuberous Begonias Indoors for Dormancy

Tuberous begonias are stunning in the summer, but they require a "power nap" to produce those big blooms again next year. Bringing them indoors for the winter involves a process called overwintering the tubers. This is a very simple task that ensures your favorite varieties return bigger and better every year.

Timing the Harvest

The best time to start the process is after the first light frost. A light frost will blacken the foliage but will not harm the tuber protected underground. This cold snap signals to the plant that it is time to move its energy from the leaves down into the tuber. If you live in a climate where it does not frost, simply look for the leaves to start yellowing and the plant to look a bit tired in late autumn.

The Curing Process

Once the foliage has died back, carefully dig up the tubers. Use a hand trowel and give the plant plenty of space so you do not accidentally nick the tuber. Shake off the excess soil and trim the stems back to about one inch.

The next step is "curing." Place the tubers in a dry, shaded area with good airflow for about a week. This allows the outer skin to toughen up, which prevents rot during storage. A garage or a covered porch is a perfect spot for this. Once they are dry to the touch, you can gently brush away any remaining dry soil.

Proper Storage Conditions

After curing, it is time to tuck the tubers away for the winter. You want a storage medium that is breathable but holds a tiny bit of moisture. Many gardeners use:

• Dry peat moss
• Vermiculite
• Wood shavings
• Paper bags

Place the tubers in a sturdy cardboard box or a plastic bin with the lid left slightly ajar for ventilation. Store the box in a cool, dark, and dry place. A basement or an unheated closet that stays between 40°F and 50°F is ideal. Check on your begonia tubers once a month to make sure they are still firm and show no signs of shriveling or mold.

What to Do Next

1. Wait for a light frost to signal dormancy.
2. Dig tubers carefully and trim stems to one inch.
3. Cure in a dry, airy spot for 7 to 10 days.
4. Pack in peat moss or wood shavings.
5. Store in a cool, dark place (45°F is the "sweet spot").

Growing Begonias as Houseplants

If you have wax begonias or Rex begonias, you don't have to say goodbye to their color when the snow starts to fall. These varieties can live quite comfortably indoors. Turning a garden begonia into a houseplant is an easy way to brighten your home during the darker months.

Choosing the Right Pot

When you dig up your begonias from the garden, choose a pot that is only slightly larger than the root ball. Begonias actually prefer to be a little bit "snug" in their containers. If the pot is too large, the soil stays wet for too long, which can lead to root issues. Use a high-quality, well-draining potting mix. You want the soil to be light and fluffy so the roots can breathe.

The Acclimatization Period

Moving from the great outdoors to a climate-controlled house can be a shock for any plant. To make the transition easier, move your potted begonias to a shady spot outside for a few days before bringing them inside permanently. This helps them get used to lower light levels. Once they are inside, do not be surprised if a few leaves turn yellow or drop off. This is a normal part of the adjustment process. Your begonia will soon grow new leaves that are adapted to the indoor light.

Indoor Light Requirements

Indoors, begonias love bright, indirect light. An east-facing or west-facing window is usually the best spot. Direct afternoon sun through a window can be too hot and might scorch the delicate leaves. If you notice your begonia stems are getting very long and "leggy," it is probably searching for more light. In that case, move it to a brighter location or use a simple grow light to supplement the natural sunshine.

Temperature and Drafts

Most begonias thrive in the same temperatures that humans enjoy. They like it between 65°F and 75°F during the day. However, they are sensitive to sudden temperature changes. Keep your plants away from cold drafts near doors or the drying heat of radiators and vent registers. A consistent, stable environment is the key to a happy indoor begonia.

Key Takeaway: Moving begonias inside is easy if you give them a few days to adjust to lower light and choose a pot that fits their root ball snugly.

Caring for Begonias During the Winter

Once your begonias are settled into their new indoor home, their care routine will change slightly. Winter is a slower time for plant growth, so they won't need as much "fuel" as they did during the peak of summer.

The Finger Test for Watering

The most common mistake with indoor begonias is overwatering. Because there is less sun and the air is cooler, the soil stays moist for much longer than it does outdoors. Always use the "finger test" before reaching for the watering can. Stick your finger about an inch into the soil. If it feels dry, go ahead and water. If it feels damp, wait a few more days.

Always water at the base of the plant. Getting water on the leaves can sometimes lead to spotting or fungal issues, especially if the air isn't moving much. Ensure your pot has drainage holes so the water can run out freely. Never let your begonia sit in a saucer of standing water.

Managing Humidity

Begonias are tropical plants by nature, and they love humidity. Unfortunately, our homes tend to be very dry in the winter due to heating systems. If the edges of your begonia leaves are turning brown and crispy, the air is likely too dry.

You can easily boost the humidity around your plants without turning your living room into a swamp. One of the best methods is to use a pebble tray. Fill a shallow tray with small stones and add water until it is just below the tops of the pebbles. Set your begonia pot on the stones. As the water evaporates, it creates a little pocket of humid air right where the plant needs it. Grouping several plants together also helps, as they naturally release moisture into the air through their leaves.

Fertilizing and Pruning

In the winter, most begonias take a break from active blooming. Because they aren't working as hard, you can stop fertilizing them entirely from November through February. When you see new growth starting in the spring, you can begin using a balanced liquid fertilizer at half-strength once a month.

Pruning is also helpful for indoor begonias. If the plant starts to look a little messy or thin, don't be afraid to pinch off the tips of the stems. This encourages the plant to grow bushier and more compact. You should also remove any dead leaves or faded flowers to keep the plant looking its best and to prevent any pests from hiding in the debris.

"What to Do Next" Summary

• Water only when the top inch of soil feels dry.
• Use a pebble tray to provide extra humidity.
• Keep plants away from heaters and drafty windows.
• Stop fertilizing during the darkest months of winter.
• Pinch back leggy stems to keep the plant bushy.

Troubleshooting Common Indoor Begonia Issues

Even with the best care, you might occasionally see something that doesn't look quite right. Don't worry—most begonia issues are easy to fix once you know what to look for.

Dropping Leaves

If your begonia drops a lot of leaves right after you bring it inside, it is usually just adjusting to the change in light and humidity. As long as the stems feel firm and you see tiny new buds forming, the plant is fine. If it continues to drop leaves all winter, check the soil. It might be too wet, or the plant might be sitting in a cold draft.

Powdery Mildew

This looks like a light dusting of white flour on the leaves. It usually happens when the air is stagnant and damp. To fix this, increase the airflow around your plant and make sure you aren't getting water on the leaves when you water. You can also move the plant to a slightly brighter spot.

Pests

Indoor plants can sometimes attract uninvited guests like mealybugs or spider mites. These are easy to manage if you catch them early. Check the undersides of the leaves once a week. If you see tiny white cottony spots (mealybugs) or very fine webs (spider mites), you can wipe them away with a cotton swab dipped in rubbing alcohol. For a larger infestation, a gentle spray of insecticidal soap usually does the trick. Always follow the instructions on the label for the best results.

Moving Begonias Back Outside in Spring

As the days get longer and the weather warms up, your begonias will be ready to return to the garden. This is an exciting time, but you want to move slowly to avoid shocking the plants.

Checking the Temperature

The most important rule for begonias is to wait until the danger of frost has completely passed. Begonias are very sensitive to cold. We recommend waiting until nighttime temperatures consistently stay above 50°F before moving them outdoors. Hardiness Zone Map

Hardening Off

Just as you acclimatized the plants to the indoors, you must "harden them off" before they move back to the garden. Start by putting them in a sheltered, shady spot outside for a few hours during the day, then bring them back in at night. Over the course of a week, gradually increase the amount of time they spend outside and the amount of light they receive.

Waking Up Tuberous Begonias

If you stored tubers in the basement, you can start waking them up in late March or early April. Take the tubers out of storage and place them on a layer of damp potting soil in a warm, bright room. Don't bury them completely; just press them into the soil.

When you see small pink or green sprouts appearing, you can pot them up properly. Keep the soil lightly moist and place them in a sunny window. By the time the weather is warm enough to plant them outside, you will have healthy, well-established plants ready to bloom. At Longfield Gardens, we have found that starting tubers indoors early gives you a much longer season of flowers.

Key Takeaway: Patience is the secret to a successful spring transition. Wait for warm nights and give your plants a week to get used to the outdoor air.

The Joy of Multi-Season Gardening

Bringing your begonias indoors is about more than just saving a plant; it is about the continuity of your garden. There is a deep sense of satisfaction in seeing a tuber that you have cared for over three or four winters produce a massive display of flowers. It connects your gardening seasons together and makes the hobby feel even more rewarding.

Whether you are tucking tubers away in a box of peat moss or enjoying a colorful Rex begonia on your kitchen table, you are part of a long tradition of gardeners who refuse to let the winter stop their love for plants. With just a little bit of attention to light, water, and temperature, your begonias will be a source of beauty in your home and garden for years to come.

Our team at Longfield Gardens is always here to support your gardening journey. We believe that gardening should be a simple, joyful part of your life. By following these easy steps, you can ensure that your begonias remain a vibrant part of your landscape season after season.

"Gardening is a cycle of growth and rest. By bringing begonias indoors, we simply move that cycle to a place where we can continue to enjoy it, regardless of the weather outside."

• Step 1: Determine if your begonia needs to go dormant (tuberous) or stay active (wax/Rex).
• Step 2: Harvest and cure tubers after the first frost, or pot up houseplants before the cold sets in.
• Step 3: Provide bright, indirect light and manage humidity for indoor plants.
• Step 4: Water carefully, using the finger test to avoid over-saturating the soil.
• Step 5: Gradually reintroduce plants to the outdoors once spring nights are warm.

FAQ

Can I keep tuberous begonias growing as houseplants all winter?

It is not recommended to keep tuberous begonias growing through the winter because they naturally require a dormancy period to remain healthy. If you do not let them rest, the tubers will eventually weaken, and the plant will produce fewer and smaller flowers the following year. Allowing them to go dormant for 3 to 4 months ensures they have the energy needed for a spectacular summer show.

Why are the leaves on my Rex begonia turning brown at the edges?

Brown, crispy edges on begonia leaves are usually a sign of low humidity. Most homes become very dry when the heater is running during the winter months. You can fix this by placing your plant on a pebble tray filled with water or by grouping it with other houseplants to create a more humid microclimate. Avoid misting the leaves directly, as this can lead to fungal problems.

How do I know if my begonia tuber is still alive in storage?

A healthy begonia tuber should feel firm and heavy, similar to a fresh potato. If you check your tubers during the winter and find one that feels light, hollow, or very mushy, it has likely dried out or rotted and should be discarded. As long as the tuber is firm, it is successfully resting and will be ready to sprout when you bring it back into the light in the spring.

Do I need to fertilize my begonias while they are indoors?

If you are growing begonias as houseplants, you should stop fertilizing them during the late fall and winter. Since there is less natural sunlight, the plants grow much more slowly and do not need the extra nutrients. Once you see vigorous new growth and longer days in the spring, you can resume a regular fertilizing schedule to help the plant prepare for its move back outdoors.