Introduction
There is a special kind of excitement that comes with spotting the first colorful blooms of a begonia tucked into a shady corner of the garden. These plants are beloved for their ability to brighten up dim spaces with vibrant flowers and striking foliage. Whether you are planting them in garden beds or hanging baskets, begonias offer a reliable splash of color that lasts from early summer right through the first frost. At Longfield Gardens, we enjoy helping gardeners discover how these versatile plants can fit into any landscape.
Many gardeners find themselves wondering if they can enjoy these beautiful blooms year after year without buying new plants each spring. The answer to whether a begonia is a perennial depends on the specific variety you choose and the climate where you live. This guide is designed for home gardeners who want to understand the lifespan of their begonias and how to help them return for another season.
While most begonias are grown as annuals in the United States, many are actually tender perennials that can survive for years with the proper care and winter protection.
The Difference Between Annual and Perennial Begonias
To understand if your begonia will come back next year, it helps to look at how plants are classified. In the gardening world, a perennial is a plant that lives for more than two years, while an annual completes its life cycle in a single growing season. Begonias fall into a unique middle ground often called "tender perennials."
In their native tropical and subtropical environments, begonias grow year-round. They do not die off when the calendar turns; they simply keep growing. However, because they evolved in warm climates, they have no natural defense against freezing temperatures. In most parts of the United States, a single night of frost will stop a begonia in its tracks.
Because of this sensitivity to cold, most gardeners treat begonias as annuals. They plant them in the spring, enjoy them all summer, and let the winter weather take its course. However, if you live in a frost-free region—typically USDA hardiness zones 9, 10, or 11—your begonias may live outdoors all year as true perennials. For those in colder zones, you can still treat them as perennials by moving them indoors or storing their roots over the winter.
Identifying Your Begonia Type
Not all begonias are the same, and their growth habits often dictate how you should care for them. Knowing which type you have is the first step in deciding if you can keep it as a perennial.
Tuberous Begonias
These are some of the most spectacular varieties, known for their large, rose-like flowers and trailing habits. They grow from a thick, potato-like root called a tuber. Tuberous begonias are classic tender perennials. They naturally go through a period of dormancy in the winter, which makes them very easy to save and replant. You can simply dig up the tubers in the fall, store them in a cool, dry place, and start them again the following spring.
Wax Begonias (Fibrous)
You will often see these in garden centers as small "bedding plants." They have waxy, succulent leaves that are either green or bronze and produce clusters of small red, white, or pink flowers. Wax begonias have fibrous roots rather than tubers. While they are perennials in the tropics, they are almost always grown as annuals in the U.S. because they are difficult to store in a dormant state. To keep these alive, you must bring the entire plant indoors as a houseplant before the weather turns cold.
Rex and Foliage Begonias
These begonias are grown primarily for their incredible leaves, which can feature swirls of silver, purple, pink, and deep green. Like wax begonias, these are fibrous or rhizomatous (growing from horizontal stems near the soil surface). They make excellent year-round perennials if kept indoors as houseplants.
Hardy Begonias (Begonia grandis)
This is the one true perennial begonia for gardeners in cooler climates. Unlike its tropical cousins, the hardy begonia (Begonia grandis) can survive the winter in the ground in USDA zones 6 through 9. It produces lovely heart-shaped leaves and delicate pink flowers in late summer. It survives the winter by dropping tiny "bulbils" (small pea-sized growths) that sprout into new plants the following spring.
Key Takeaway: Most begonias are tender perennials that cannot survive frost. Only the "Hardy Begonia" (Begonia grandis) is capable of surviving cold winters in the ground in most of the U.S.
Growing Tuberous Begonias as Perennials
Tuberous begonias are the variety most likely to be treated as perennials by home gardeners. Because they grow from a sturdy tuber, they have a built-in storage system for energy. This allows them to "sleep" through the winter and wake up when the weather warms. We work with growers to ensure the tubers you receive are high-quality and ready to perform, but their long-term success depends on how you handle them at the end of the season.
How to Overwinter Tuberous Begonias
If you want your tuberous begonias to return, you need to follow a simple process once the growing season ends.
- Watch the weather: Continue enjoying your begonias until the first light frost kills the foliage. This frost tells the plant it is time to go dormant.
- Lift the tubers: Carefully dig the tubers out of the ground or remove them from their pots. Be gentle to avoid bruising or cutting the tuber.
- Dry them out: Place the tubers in a shaded, dry, and well-ventilated area for about a week. This "curing" process helps the outer skin toughen up and prevents rot during storage.
- Clean and trim: Once dry, remove any remaining stems or loose soil. The stems should pull away easily from the tuber once they are fully dried.
- Storage: Place the tubers in a box filled with dry peat moss, sawdust, or vermiculite. Store the box in a cool, dark, and dry place where the temperature stays between 40°F and 50°F. A basement or an unheated (but frost-free) garage is often perfect.
Restarting in the Spring
When spring arrives, you can bring the tubers out of storage. Start them indoors about 6 to 8 weeks before the last expected frost. Place them on top of moist potting soil with the hollow side facing up. Once they start to sprout and the outdoor temperatures are consistently warm, they can go back into the garden. For additional guidance, see this guide to planting tuberous begonias in containers.
What to do next:
- Mark your calendar for the first frost date in your area.
- Prepare a storage box with dry peat moss before the cold arrives.
- Inspect your stored tubers once a month to ensure they aren't shriveling or rotting.
The Role of Hardiness Zones and Timing
When deciding if a begonia can be a perennial for you, your USDA hardiness zone is the most important factor. Hardiness zones are based on the average minimum winter temperature in your area. This helps you understand which plants can survive the winter outdoors.
For most begonias, the magic number is 50°F. When nighttime temperatures start dropping below this point, the plants will begin to slow down. If you live in zones 9 through 11, you may be able to leave your begonias in the ground year-round. In these warm regions, the soil stays warm enough that the roots do not freeze.
In zones 8 and colder, the ground will freeze deep enough to kill the roots of wax, tuberous, and Rex begonias. If you are in one of these zones, you must either treat the plants as annuals or use the overwintering methods mentioned above. Timing is everything; if you wait until a hard freeze (below 28°F) to dig up your plants, the tubers or roots may already be damaged.
Why Some Gardeners Prefer the Annual Approach
Even though many begonias are perennials by nature, many people choose to grow them as annuals every year. This is a perfectly valid and very popular way to garden. There are several benefits to the annual approach that might make it the right choice for your lifestyle.
Simplicity and Ease
Overwintering plants takes time, space, and a bit of effort. If you have a busy schedule, you might prefer the simplicity of starting fresh each spring. This eliminates the need for storage space and the task of monitoring tubers throughout the winter.
Design Flexibility
When you treat begonias as annuals, you aren't committed to the same colors or varieties every year. One year you might want the bold, upright look of "Non-Stop" tuberous begonias, and the next you might prefer the delicate, trailing look of "Illumination" varieties. Annual gardening allows you to treat your yard like a rotating art gallery.
Guaranteed Performance
While overwintered tubers can perform well, young plants or fresh tubers often have more vigor. Starting with new plants ensures you are getting the most current genetics and the healthiest starts possible. This can lead to more blooms and fewer issues with pests or diseases that might have hitched a ride on stored plants.
Simple Rules for Begonia Success
Regardless of whether you grow them as annuals or perennials, following a few basic gardening rules will help your begonias thrive. These plants are not demanding, but they do have specific preferences.
Right Plant, Right Place
Begonias are famous for their love of shade. Most varieties prefer dappled light or morning sun with afternoon shade. Intense, direct afternoon sun can scorch their leaves and cause the flowers to wilt. Additionally, begonias need "drainage," which is just a gardening word for how quickly water moves through the soil. They do not like to sit in soggy mud. If your soil is heavy clay, consider growing them in raised beds or containers.
Water Correctly, Not Constantly
A common mistake is watering begonias too frequently. They prefer soil that is "evenly moist," which means it feels like a wrung-out sponge. The best approach is to water them deeply until the water runs out of the bottom of the pot, and then wait until the top inch of soil feels dry before watering again. This encourages the roots to grow deep into the soil. For more outdoor care advice, see how to grow begonias outdoors.
Space to Breathe
Begonias can be susceptible to mildew if they are packed too tightly together. Giving them enough space for air to circulate between the leaves keeps them healthy and looking their best. Check the spacing recommendations on your plant tag; usually, 8 to 12 inches apart is ideal for most garden varieties.
Key Takeaway: Success with begonias comes from matching their tropical needs—shade, moisture, and warmth—to the spot you choose in your garden.
Frequently Asked Questions
Will my begonias come back if I leave them in the ground?
This depends entirely on your climate. If you live in a tropical or subtropical area (USDA zones 9–11), they will likely return. In colder zones, most begonias will die during the winter unless they are "Hardy Begonias" (Begonia grandis). Most gardeners in the U.S. should plan to either replant or bring their begonias indoors for the winter.
Can I grow begonias as houseplants during the winter?
Yes, wax begonias and Rex begonias make excellent houseplants. Before the first frost, carefully dig them up or bring their containers inside. Place them in a bright window with indirect light. Keep in mind that indoor air is often dry, so they may appreciate being placed on a tray of pebbles and water to increase humidity.
How do I know if I have a tuberous or wax begonia?
The easiest way to tell is by looking at the roots and the leaves. Tuberous begonias usually have larger, spectacular flowers and stems that grow from a single, thick, brown tuber. Wax begonias have smaller, rounded, shiny leaves and a cluster of many tiny, fibrous roots. If you bought your begonia in a multi-pack of small "bedding plants," it is likely a wax begonia.
When is the best time to plant begonias outside?
Patience is key when it comes to begonias. You should wait until all danger of frost has passed and the soil has warmed up. A good rule of thumb is to wait until nighttime temperatures are consistently above 50°F. Planting too early in cold, wet soil can cause the roots or tubers to rot before they have a chance to grow. See this guide to when to plant tuberous begonia bulbs for more timing advice.
Conclusion
Begonias are a wonderful addition to any garden, offering endless color and texture with very little fuss. While they are technically perennials in their native homes, their sensitivity to cold means most of us enjoy them as seasonal highlights. Whether you choose to save your tubers for next year or start fresh each spring with new varieties from our upright double begonia collection, the reward is a beautiful, thriving garden.
- Identify your begonia type to see if it can be saved.
- Check your USDA zone to understand your local winter conditions.
- Decide between the ease of annuals or the reward of perennials.
- Always wait for warm soil before planting in the spring.
"Gardening is about working with nature to create beauty. Whether a plant lasts for one season or ten, the joy it brings to your outdoor space is always worth the effort."
At Longfield Gardens, we want you to feel confident in your garden choices. If you are looking for new varieties to try or need high-quality tubers to start your begonia journey, we invite you to explore our selection and find the perfect match for your shady spots. Happy gardening!
