Introduction
Begonias are a favorite for home gardeners because they offer such a stunning variety of colors and textures. Whether you are looking for the massive, rose-like blooms of tuberous varieties or the glossy, reliable foliage of wax begonias, these plants bring a sense of joy to any shaded corner. At Longfield Gardens, we enjoy helping people discover how versatile these plants can be in beds, borders, and hanging baskets.
The question of whether begonias are annuals or perennials is one of the most common things we hear from new gardeners. The answer depends largely on where you live and how much effort you want to put into your seasonal garden transitions. While they have a reputation for being one-season wonders, their botanical story is much more interesting.
This post explains the life cycle of the begonia and provides clear steps for managing them year after year. We will cover the different types of begonias and how to give them the best chance at a long life. By the end, you will know exactly how to treat these beautiful plants to get the most value and beauty from every bloom.
The Botanical Truth: Begonias as Perennials
Botanically speaking, all begonias are perennials. This means that in their native tropical and subtropical environments, they do not naturally die off at the end of a single growing season. In the wild, they continue to grow, flower, and thrive for many years. They are native to regions like Central and South America, Africa, and parts of southern Asia, where the weather remains warm and humid year-round.
In the United States, however, we use the term "tender perennial" to describe them. This term refers to plants that are genetically programmed to live for many years but lack the internal "antifreeze" needed to survive a typical frost. Because begonias are made up of mostly water in their stems and leaves, even a light frost can cause significant damage to the plant tissue.
Because of this sensitivity, most gardeners in temperate climates treat begonias as annuals. They plant them in the spring, enjoy their blooms all summer, and allow the first frost of autumn to conclude the plant's life cycle. However, if you provide the right protection or live in a frost-free region, these plants can happily return for several seasons.
Key Takeaway: Begonias are naturally perennials, but their tropical DNA makes them very sensitive to cold. In most of the U.S., they are treated as annuals unless they are moved indoors for the winter.
Defining the "Tender Perennial"
Understanding the "tender perennial" label is the first step toward gardening success. Hardiness refers to a plant's ability to survive the coldest winter temperatures in a specific geographic area. Most begonias are only hardy in USDA zones 9, 10, and 11. In these areas, the ground never freezes, and temperatures rarely dip toward the freezing mark.
If you live in one of these warm southern or coastal zones, you can leave your begonias in the ground all year. They may slow down or go slightly dormant during the shorter days of winter, but the root systems will stay alive and push out new growth as soon as the spring sun warms the soil.
For the rest of the country—Zones 3 through 8—the winter environment is simply too harsh for a begonia to remain outdoors. For these gardeners, a begonia is "practically" an annual. You get one glorious season of color, and then you start fresh the following year. This is not a failure of the plant or the gardener; it is simply a reflection of the plant’s natural limitations in a cooler climate.
Four Begonia Types and Their Life Cycles
Not all begonias are created equal. The way a begonia grows underground dictates how you should care for it and whether it is easy to keep alive through the winter.
Tuberous Begonias
Tuberous begonias, such as the Non Stop begonias or Picotee varieties, grow from a thick, potato-like structure called a tuber. These varieties are famous for their large, dramatic flowers that often resemble roses or camellias. Because they have a storage organ (the tuber), they have a built-in survival mechanism for a dormant period.
In the wild, tuberous begonias use this dormancy to survive dry seasons. In your garden, you can use this dormancy to save the plant from the winter cold. Tuberous begonias are the easiest type to keep as perennials because you can simply "hibernate" the tubers in a cool, dry place until spring.
Wax Begonias
Wax begonias, often called fibrous begonias, are the most common bedding plants. They have small, succulent leaves and clusters of red, white, or pink flowers. Unlike the tuberous types, these grow from a mass of thin, hair-like roots.
Because they lack a thick storage organ, wax begonias do not have a natural dormant phase. To keep them as perennials, they must stay in an active growth state. This usually means bringing them inside as houseplants before the first frost. They are very reliable and can live for four or five years if kept in a sunny window during the winter months. For a broader overview of the family, see All About Begonias.
Rhizomatous and Rex Begonias
Rex begonias are grown primarily for their incredible foliage, which can feature swirls of silver, purple, pink, and deep green. These plants grow from a rhizome, which is a thick stem that grows horizontally along the soil surface.
Like wax begonias, these do not typically go dormant. They are most often kept as year-round houseplants. While they can spend the summer on a shaded patio, they must return indoors long before the autumn chill sets in. Our Pegasus variety is a great example of a begonia that offers stunning silver-patterned leaves and transitions easily between indoor and outdoor life.
Cane-like Begonias
Often called "Angel Wing" begonias because of the shape of their leaves, these plants have long, woody stems that resemble bamboo. They are upright and can grow quite large over several years. These are almost exclusively treated as perennials by keeping them in pots. You can enjoy them as large floor plants inside your home and then move them to a porch for a summer growth spurt. If you like this upright style, browse our Upright Double begonias.
What to do next:
- Identify the root type of your begonia (tuberous vs. fibrous).
- Check your USDA hardiness zone to see if outdoor overwintering is possible.
- Decide if you want to store tubers or keep the plant active as a houseplant.
Climate Matters: Hardiness Zones Explained
At Longfield Gardens, we always recommend checking your local hardiness zone before planning your garden. This ensures that your expectations match the reality of your local weather.
- Zones 9-11: You can plant begonias in the ground as permanent landscape features. They will function as true perennials with very little extra effort.
- Zones 3-8: You should plan to plant your begonias in late spring after the danger of frost has passed. You will treat them as annuals unless you follow an overwintering plan.
If you are unsure of your zone, the Hardiness Zone Map is a helpful place to start.
Remember that soil temperature is just as important as air temperature. Begonias love warm "feet." Even if the days are sunny, if the soil is still cold and damp from winter, the plants will sit still and may even struggle. Waiting until nighttime temperatures are consistently above 50°F is the secret to a fast start.
Transitioning Begonias: From Garden to Greenhouse
If you want to move beyond the "annual" label and keep your begonias for next year, you have two main paths. Both require a little bit of timing, but the reward is larger plants and more blooms in the second and third seasons.
Saving Tuberous Begonias for Spring
Saving tubers is a rewarding way to build a collection of your favorite flowers. The process begins when the leaves start to yellow in the fall or immediately after the first light frost kills the top growth.
- Lift the tubers: Carefully dig the tubers out of the soil. Be gentle, as the tubers can be brittle.
- Cure them: Let the tubers sit in a warm, dry, and shady spot for about a week. This allows the outer skin to toughen up and prevents rot during storage.
- Clean and trim: Once dry, remove any remaining stems or loose soil.
- Store in bedding: Place the tubers in a box filled with dry peat moss, sand, or sawdust. Do not use plastic bags, as they trap moisture and cause the tubers to decay.
- Keep cool: Store the box in a dark place that stays between 40°F and 50°F. A cool basement or insulated garage is usually perfect.
If you want details on timing, see our shipping information page.
In late winter or early spring, you can bring these tubers back into the light, give them a little water, and watch them sprout. Starting them indoors about six weeks before the last frost gives you a head start on the blooming season.
Overwintering Wax Begonias as Houseplants
Since wax begonias don't go dormant, you have to keep them growing. If you have them in the garden, you can dig them up and put them in a pot with fresh potting soil.
The transition from the humid outdoors to a dry indoor heated home can be a shock. To make it easier, bring the plants inside while the windows are still open in the early autumn. This allows the plant to adjust gradually to the lower light levels of your home. Place them in a bright window, but keep them away from heater vents, which can dry out the leaves too quickly.
Key Takeaway: Turning a "seasonal annual" into a perennial is entirely possible with a little bit of indoor space. Tuberous varieties need a dry rest, while wax and foliage varieties need a sunny windowsill.
The Benefits of Growing Begonias as Annuals
While many gardeners enjoy the challenge of overwintering, there is absolutely nothing wrong with treating begonias as annuals. In fact, many of the most successful landscapes in the country rely on fresh plantings every spring.
Treating them as annuals offers several advantages:
- Freshness: You don't have to worry about pests or diseases that might have hitched a ride on last year's plants.
- Variety: Every year is an opportunity to try a new color or leaf pattern. Maybe this is the year for the deep burgundy leaves of the Surefire Red or the pastel tones of Double Delight Blush Rose.
- Simplicity: Gardening should be a relaxing hobby. If the thought of digging and storing tubers feels like a chore, buying fresh plants each spring keeps the hobby light and fun.
- Perfect Sizing: In many garden designs, especially window boxes and small containers, you need a plant of a specific size. New annuals are predictable in their growth, whereas a three-year-old begonia might become too large for its space.
Setting the Stage for Success
Whether you want your begonias to live for six months or six years, the foundation of their health is "Right Plant, Right Place." If a begonia is healthy and vigorous during the summer, it will be much easier to overwinter or will provide a much better floral display as an annual.
For a broader selection of shade-loving options, explore our shade bulbs and perennials.
Soil and Moisture
Begonias have very specific preferences when it comes to their roots. They like "evenly moist" soil. This means the soil should feel like a wrung-out sponge. If the soil stays soggy, the stems and roots will rot quickly. This is especially true for tuberous varieties, which can disappear into a mushy mess if they sit in standing water.
Always use a pot with drainage holes. If you are planting in the ground, ensure the area doesn't collect puddles after a rainstorm. Adding a little compost or peat moss to your soil can help it hold the right amount of moisture while still letting the excess drain away.
Light and Airflow
Most begonias are famous for loving the shade, but "shade" doesn't mean "darkness." They thrive in filtered light, like the dappled sun under a tall tree, or in a spot that gets gentle morning sun and afternoon shade.
Foliage-heavy begonias, like the Rex varieties, are particularly sensitive to the hot afternoon sun, which can scorch their beautiful patterns. On the other hand, wax begonias with bronze-colored leaves can actually handle quite a bit of sun if they have enough water.
Good airflow is the final piece of the puzzle. Because begonias have fleshy leaves and stems, they can be prone to powdery mildew if the air is stagnant and humid. Space your plants according to the tag instructions—usually 6 to 12 inches apart—to let the breeze move through the foliage.
What to do next:
- Check your soil drainage by pouring water into a small hole; it should disappear within minutes.
- Find a spot with "bright shade" for your most colorful varieties.
- Plan your spacing to ensure every plant has room to breathe as it grows.
Conclusion
Begonias are truly the chameleons of the garden. They can be hardworking annuals that fill your porch with color for a season, or they can become long-term perennial companions that you move from the garden to the living room every year. At Longfield Gardens, we believe the best way to grow them is the way that brings you the most satisfaction.
If you want to explore more options before choosing your favorites, start with our begonia collection.
If you live in a cold climate, don't feel pressured to save every tuber. Enjoy the freedom of starting fresh each spring with new varieties. But if you find a specific flower that you simply can't live without, take heart in knowing that its perennial nature makes it possible to keep it for many years to come.
- Tuberous begonias can be stored as dry tubers in a cool, dark place.
- Wax and Rex begonias can live for years as houseplants in a sunny window.
- Success starts with warm soil and consistent, moderate moisture.
- Most U.S. gardeners treat begonias as annuals for simplicity and variety.
"The secret to begonia success isn't about fighting the seasons; it's about understanding the plant's tropical heart and giving it the warmth it craves."
We invite you to explore the different colors and shapes available this season. Whether you choose a trailing variety for a basket or an upright wax begonia for a border, you are adding a touch of tropical elegance to your home.
FAQ
Can begonias survive a frost?
No, most begonias cannot survive a frost. Because their stems and leaves are succulent and hold a lot of water, the freezing temperatures turn the plant tissue to mush very quickly. If a frost is predicted and you want to save your plants, you should bring them indoors or cover them with a frost blanket immediately.
Do tuberous begonias come back every year?
Tuberous begonias will come back every year if you live in a frost-free zone (Zones 9-11) or if you dig up the tubers and store them indoors for the winter. In colder climates, the tuber will freeze and rot if left in the ground, so manual storage is necessary to keep them as perennials. For more guidance, review our shipping information.
Should I bring my wax begonias inside for the winter?
If you want to keep your wax begonias as perennials, you must bring them inside before the temperature drops below 50°F. They do not have a dormant phase like tuberous begonias, so they need to stay in a warm, bright environment as houseplants until the following spring. You can also use the Hardiness Zone Map to judge whether outdoor overwintering is realistic.
Are begonias perennial in Zone 7?
In Zone 7, begonias are treated as annuals because the winter temperatures frequently drop well below freezing. While the summer heat in Zone 7 is perfect for begonias, the roots and tubers will not survive the winter in the ground. You must either replant each spring or overwinter the plants indoors.
