Introduction
Walking through a garden center in late spring is a treat for the senses. The sight of vibrant red, soft pink, and sunny yellow begonias often marks the true beginning of the gardening season. These plants are beloved for their ability to brighten up shady corners and their remarkably long bloom time. Many gardeners find themselves wishing these beautiful flowers would return on their own once the winter frost fades.
At Longfield Gardens, we know that understanding how your plants grow is the first step toward a successful landscape. Whether you are planting a few wax begonias in a window box or filling a large garden bed with tuberous varieties, the question of their lifespan is a common one. Most people see them sold alongside annuals, but their true nature is a bit more interesting.
This guide will explain whether begonias are perennials or annuals and how you can enjoy them year after year. We will look at the different types of begonias and provide simple steps for keeping them alive through the winter months. By the end, you will know exactly how to manage these versatile plants in your own climate.
The simple answer is that begonias are botanically perennials, but their ability to return each year depends entirely on your local weather and the specific variety you grow.
The Botanical Truth About Begonias
To understand begonias, it helps to look at where they come from. Most begonias are native to tropical and subtropical regions in Central and South America, Africa, and Asia. In these warm, humid environments, begonias grow as perennials. They live for many years, slowly spreading and blooming whenever conditions are right.
In most parts of the United States, we experience a true winter with freezing temperatures. Begonias are "tender perennials," which means they have no natural defense against frost. Even a light freeze will turn their fleshy stems and leaves to mush. Because of this, most gardeners in cooler zones treat them as annuals, planting fresh ones every spring.
If you live in a very warm climate, such as USDA zones 10 or 11, begonias can stay in the ground all year. In these areas, they will continue to grow and bloom as true perennials. For the rest of us, keeping them from year to year requires a little bit of extra care during the autumn months.
Key Takeaway: Begonias are perennials by nature, but they are so sensitive to cold that they are usually grown as annuals in the United States.
Different Types of Begonias
Not all begonias are the same. Their growth habits and how they handle the cold vary depending on the group they belong to. Knowing which type you have is the first step in deciding how to care for them.
Tuberous Begonias
Tuberous begonias are famous for their large, spectacular flowers that can look like roses or camellias. These plants grow from a "tuber," which is a thick, underground stem that stores food. These are the most common begonias to keep from year to year. Because they have a built-in storage organ, they are designed to go through a period of rest, or dormancy.
Wax Begonias (Fibrous Begonias)
These are the small, bushy begonias often used as "bedding plants" in garden borders. They have shiny, succulent leaves that can be green or bronze. Their roots are thin and fibrous rather than thick like a tuber. While they are perennials in the tropics, they are almost always grown as annuals because they are inexpensive and easy to replace.
Rhizomatous and Rex Begonias
These begonias are mostly grown for their incredible foliage. Their leaves come in swirls of silver, purple, pink, and green. They grow from a "rhizome," which is a thick stem that crawls along the surface of the soil. These are very popular as houseplants because they love the consistent temperatures found inside a home.
Cane Begonias
You might know these as "Angel Wing" begonias because of their long, pointed leaves. They grow tall, woody stems that look a bit like bamboo. Like the Rex varieties, these are often kept as perennials by moving them indoors for the winter.
The Exception: The Hardy Begonia
While most begonias shudder at the thought of a frost, there is one notable exception. Begonia grandis, also known as the hardy begonia, is a true perennial for many US gardeners. This plant is hardy in USDA zones 6 through 9.
Hardy begonias look very similar to their tropical cousins. They have beautiful heart-shaped leaves with red veins and delicate pink or white flowers. Instead of dying when the temperature drops, this plant goes dormant and hides underground. It is often one of the last plants to emerge in the spring, so you must be patient.
If you want a begonia that returns every year without any work from you, the hardy begonia is the best choice. It loves shade and moist soil. It even spreads on its own by dropping tiny "bulbils" (small baby plants) that grow into new begonias the following year.
What to do next with Hardy Begonias:
- Plant them in a spot with dappled shade and rich soil.
- Mark the spot with a stake so you don't accidentally dig them up in early spring.
- Leave the fallen leaves on top of them in winter to provide extra insulation.
- Pair them with hostas or ferns for a beautiful woodland look.
Growing Tuberous Begonias as Perennials
Tuberous begonias provide some of the best value in the garden. Because they grow from a bulb-like tuber, you can save them in the fall and replant them the following spring. This is a great way to save money and keep your favorite colors for many seasons.
When to Start the Saving Process
In early autumn, you will notice your begonias starting to look a little tired. The leaves may begin to yellow, and the plant will stop producing as many flowers. This is a sign that the plant is preparing for its winter nap.
It is important to let the plant experience the cooling temperatures of autumn. However, you must take action before a hard freeze hits. A light frost that nips the leaves is usually okay, but a deep freeze that penetrates the soil will ruin the tuber.
Step-by-Step: How to Overwinter Begonia Tubers
Saving your tubers is a simple process that only takes a few minutes per plant.
- Lift the plant: Gently dig up the begonia, being careful not to nick the tuber with your shovel.
- Trim the stems: Cut the stems back to about one inch above the tuber.
- Clean the tuber: Shake off the loose soil. You don't need to scrub them; a little dirt is fine.
- Cure the tuber: Place the tubers in a dry, shady spot for about a week. This allows the skin to toughen up and the remaining stem to dry and fall off.
- Store for winter: Place the tubers in a box filled with dry peat moss, sawdust, or shredded paper. This keeps them dry but prevents them from shriveling completely.
- Find a cool spot: Keep the box in a cool, dark place that stays around 40°F to 50°F. A basement or a cool closet is usually perfect.
In the spring, about six to eight weeks before the last frost, you can bring the tubers out and start them in pots indoors. This gives them a head start so they are ready to bloom as soon as the weather warms up.
Key Takeaway: Saving tuberous begonias is a simple way to enjoy high-quality flowers every year without buying new plants.
Keeping Begonias as Houseplants
If you don't want to dig up your plants and store them in the dark, you can choose to bring them inside as houseplants. This works best for wax begonias, Rex begonias, and cane varieties.
When you bring a plant from the garden to the living room, it will go through a period of adjustment. The air inside our homes is much drier than the air outside. To help them transition, try to bring them in before you turn on your heater for the season.
Light and Water
Indoors, begonias need bright but indirect light. A window that faces east or west is usually best. If they don't get enough light, the stems will become "leggy," meaning they grow long and thin as they reach for the sun.
Watering is the most important part of indoor begonia care. These plants have succulent stems that store water. If the soil stays too wet, the stems will rot. Wait until the top inch of soil feels dry before you water again. In the winter, the plant's growth slows down, so it will need even less water than it did in the summer.
Humidity Matters
Most begonias love humidity. Our homes get very dry in the winter, which can cause the edges of the leaves to turn brown and crispy. You can help by placing your begonia pots on a tray filled with pebbles and a little water. As the water evaporates, it creates a humid "microclimate" around the leaves.
Right Plant, Right Place for Longevity
Whether you treat your begonias as annuals or perennials, they will live longer and look better if they are planted in the right spot. At our trial gardens, we have found that begonias are quite predictable if you give them what they need.
Shade and Sunlight
Most begonias are "shade lovers," but that doesn't mean they want to live in a dark cave. They prefer filtered sunlight or "dappled shade," like the light that filters through the leaves of a tall tree. For a deeper dive into their light needs, see our begonia shade guide.
Wax begonias with bronze leaves can handle more sun than those with green leaves. Tuberous begonias are the most sensitive; the hot afternoon sun can actually scorch their delicate petals and leaves. If you see brown, crispy patches on the leaves, the plant is likely getting too much direct sun.
Soil and Drainage
"Drainage" is a word gardeners use to describe how fast water leaves the soil. Begonias have very soft, watery stems. If they sit in soil that stays "soggy" (like a wet sponge), they will quickly rot.
To give them the best chance, plant them in loose, airy soil. If you are planting in containers, make sure there are plenty of holes in the bottom of the pot. If your garden soil is heavy clay, it is often easier to grow begonias in raised beds or pots where you can control the soil quality.
Action Plan for Success:
- Choose a spot with morning sun and afternoon shade.
- Use a high-quality potting mix for containers.
- Check the soil moisture with your finger before watering.
- Avoid getting water directly on the leaves to prevent spots.
Timing Beats Tricks
When it comes to begonias, timing is more important than any special fertilizer or "gardening hack." Because they are so sensitive to cold, you must be careful about when you put them outside in the spring.
It is tempting to plant begonias as soon as the first warm day of April arrives. However, the soil is often still cold, and late-season frosts are common. Begonias will "pout" if they are planted in cold soil. Their growth will stall, and they may turn yellow.
Wait until the nights are consistently above 50°F before moving your begonias outdoors. This ensures the soil has warmed up enough for the roots to start growing. If a surprise frost is predicted after you have planted them, cover them with a light sheet or an upside-down bucket for the night.
At Longfield Gardens, we time our shipping based on your local hardiness zone. This helps ensure your plants arrive when it is nearly time to get them into the ground. You can find more details on our shipping information page.
Simple Troubleshooting
If your begonias aren't performing well, it is usually due to one of three things: water, light, or temperature. You don't need fancy tools to fix these issues.
Why Are the Leaves Falling Off?
If a begonia suddenly drops its leaves, it is often a reaction to a big change. This happens most often when you move a plant from the outdoors to the indoors. It can also happen if the soil has become bone-dry or if the plant was exposed to a cold draft. If the stems are still firm, simply adjust the care and wait; new leaves will usually grow back.
Why Isn't It Blooming?
Begonias are generally very reliable bloomers. If yours has plenty of leaves but no flowers, it may be in too much shade. Move it to a spot with a bit more light. Another cause can be too much nitrogen fertilizer, which encourages leaves but discourages flowers. Switch to a balanced fertilizer to encourage more buds.
What Is This White Powder?
If you see a white, dusty substance on the leaves, it is likely "powdery mildew." This is a fungal issue that happens when the air is stagnant and humid. To fix this, make sure your plants aren't crowded too closely together. Better air circulation is the best way to keep the leaves clean and healthy.
The Joy of Begonias
Gardening should be a rewarding and relaxing hobby. Begonias are the perfect example of a plant that gives back much more than it takes. Whether you choose to treat them as a one-season splash of color or a multi-year investment, they bring a unique charm to the garden.
The lush leaves and constant flowers make them one of the most reliable choices for any gardener. There is a special satisfaction in seeing a tuber you saved over the winter sprout its first green leaves in the spring. It connects you to the cycle of the seasons and makes the arrival of warm weather even more exciting.
We hope this guide makes you feel confident in choosing and caring for these wonderful plants. With just a few simple steps, you can turn a seasonal flower into a long-term part of your garden's story.
Conclusion
Begonias are versatile plants that can fit into any gardening style. While they are technically perennials, most of us will grow them as annuals unless we take a few extra steps. Whether you choose the naturally hardy Begonia grandis, decide to store your tuberous begonias in a cool basement, or bring your favorites inside as houseplants, you have many options for enjoying them year after year.
Remember that the "secret" to begonia success is simply matching the plant to the right environment. Give them shade, make sure the water can drain away freely, and keep them protected from the frost.
- Choose the right type: Use tuberous varieties if you want to save them for next year.
- Watch the weather: Never plant them outside until the danger of frost has passed.
- Keep it simple: If saving them sounds like too much work, there is no shame in planting fresh ones each spring.
"Begonias offer a level of color and texture that few other shade plants can match. By understanding their tropical roots, you can help them thrive in your own backyard."
We are here to help you grow a more beautiful life, one bloom at a time. For more tips on choosing the best varieties for your home, explore our other planning guides and articles on our Learn hub or learn more about Longfield Gardens.
FAQ
Can I leave my begonias in the ground over winter?
Only if you live in a frost-free climate like USDA zones 10 or 11. In all other areas, the freezing temperatures will kill the plants. The only exception is the "Hardy Begonia" (Begonia grandis), which can survive the winter in the ground down to zone 6 if it is well-mulched.
Do begonias need to be dug up every year?
If you want to keep tuberous begonias as perennials in a cold climate, yes, they must be dug up before the ground freezes. However, many gardeners choose to treat them as annuals and buy fresh plants or tubers each spring because it is easier. Wax begonias and other fibrous types are rarely dug up because they are difficult to store.
How long do begonias live?
In their native tropical habitat or as well-cared-for houseplants, begonias can live for many years. Tuberous begonias can be saved and replanted for several seasons as long as the tubers remain healthy and firm. Some indoor "Angel Wing" begonias have been known to live for decades and grow into large, impressive specimens.
Can I grow begonias from seeds instead of tubers?
Yes, you can grow begonias from seeds, but it requires a lot of patience. Begonia seeds are incredibly tiny—almost like dust—and they grow very slowly. Most home gardeners find it much easier and faster to start with established plants or tubers, which provide big results in a single season.
