Table of Contents
- Introduction
- Finding the Ideal Light Balance
- Soil Conditions and Drainage Requirements
- Choosing the Right Physical Location
- Maximizing Impact in Containers
- Considering Airflow and Humidity
- Regional Nuances for Planting Sites
- Maximizing Beauty with Companion Plants
- Managing Your Begonia's Life Cycle
- Conclusion
- FAQ
Introduction
There is a unique sense of excitement that comes with planting your first tuberous begonia. These plants offer some of the most spectacular, rose-like blooms in the gardening world, often in shades so vibrant they seem to glow. At Longfield Gardens, we enjoy helping gardeners find the perfect spots for these tuberous begonias to ensure they thrive all season long.
Choosing the right location is the most important step in growing healthy begonias. This guide will help you identify the best areas in your yard or on your patio for these stunning flowers. Whether you are planting in the ground or using decorative containers, we will cover how to evaluate light, soil, and protection from the elements.
Finding the perfect home for your begonias is a rewarding process that sets the stage for a summer full of color. Success with tuberous begonias begins by matching their need for filtered shade and consistent moisture to the specific conditions of your outdoor space.
Finding the Ideal Light Balance
Tuberous begonias are famous for their ability to brighten up the shady parts of a garden. However, "shade" can mean many different things to a home gardener. To get the best results, you need to find a spot that offers the right amount of light without exposing the plants to harsh conditions.
The Beauty of Dappled Light
The most successful location for tuberous begonias is one that receives dappled or filtered light. This is the kind of light you find under the canopy of a tall, airy tree. The leaves of the tree break up the direct sun, creating a moving pattern of light and shadow on the ground.
This environment mimics the natural tropical habitats where begonias originally grew. It provides enough energy for the plant to produce large, healthy flowers without the risk of burning the foliage. If you have a spot under a honey locust or a similar tree with small leaves, your begonias will likely be very happy there.
Morning Sun vs. Afternoon Heat
If you do not have dappled shade, look for a spot that gets direct morning sun followed by shade in the afternoon. Morning sun is much cooler and less intense than the sun after midday. This gentle light helps the plants start their day with a boost of energy.
By the time the sun reaches its peak intensity in the early afternoon, your begonias should be in the shade. Direct afternoon sun in most parts of the United States is too hot for tuberous begonias. It can cause the leaves to turn brown at the edges or even shrivel. A location on the east side of your home is often the perfect solution for this light requirement.
Avoiding Deep Shade
While these plants love shade, they should not be planted in "deep shade." Deep shade occurs in areas where no direct sunlight ever reaches the ground, such as under a low-hanging evergreen or in a narrow alley between tall buildings.
In these dark spots, begonias may grow very tall and thin as they stretch toward the light. This is often called "leggy" growth. The plants will also produce fewer flowers because they lack the energy needed for blooming. If your chosen spot is so dark that moss is the only thing growing there, it is likely too shady for begonias.
What to do next:
- Observe your garden at different times of the day to see where the light falls.
- Identify areas on the east side of your house for gentle morning light.
- Look for spots under high-canopy trees that offer a flickering light pattern.
- Avoid the west and south sides of buildings where the heat is most intense.
Soil Conditions and Drainage Requirements
Once you have identified a spot with the right light, the next factor to consider is the soil. Tuberous begonias have a very specific preference for how they like their roots to feel. They need moisture, but they cannot sit in water.
Understanding Drainage
"Drainage" simply refers to how fast water leaves the soil after a rain or watering session. Tuberous begonias have soft, fleshy stems and tubers that are prone to rotting if the soil stays too wet for too long.
A good way to check drainage is to observe the area after a heavy rain. If you see puddles that remain for several hours, that spot has poor drainage and is not ideal for begonias. You want a location where the water soaks in quickly, leaving the soil feeling like a wrung-out sponge.
Enriching the Soil
If your garden soil is heavy clay or very sandy, you can improve it by adding organic matter. We recommend mixing in compost, leaf mold, or finely ground bark before planting. These materials help create a loose, crumbly soil structure that allows roots to grow easily and excess water to drain away.
In containers, always use a high-quality potting mix rather than garden soil. Potting mixes are specifically designed to provide the airy, well-drained environment that begonias crave. Make sure your pots have drainage holes at the bottom so water never collects around the tuber.
The Importance of Nutrients
Begonias are considered "heavy feeders." This means they use a lot of nutrients to produce their large, double blooms throughout the summer. Planting them in a spot with "fertile" soil—soil that is naturally rich in nutrients—gives them a great head start. Even in good soil, you will want to provide regular liquid fertilizer during the growing season to keep the flower show going.
Choosing the Right Physical Location
The physical layout of your yard offers many different microclimates. A microclimate is a small area where the conditions are slightly different from the rest of the yard. Finding these sweet spots can make gardening feel much easier.
Under Trees and Near Shrubs
Planting under trees is a classic choice for begonias. However, you must be mindful of root competition. Some trees, like maples, have shallow roots that will steal moisture and nutrients from your begonias.
If you plant in the ground near large trees, ensure you provide extra water during dry spells. Alternatively, placing begonias in decorative pots nestled among the tree roots is a great way to get the shade benefits without the root competition.
Against Walls and Structures
The walls of your home or garage can provide excellent protection and light management. As mentioned, the north and east sides of a building are usually the safest bets.
- North Side: This area usually stays cool and shaded all day. It is perfect for begonias, provided there is enough "sky brightness" or indirect light reflecting off nearby surfaces.
- East Side: This is the gold standard for begonias, offering cool morning sun and total shade during the heat of the afternoon.
Avoid planting directly against a south-facing brick wall. Brick absorbs heat during the day and radiates it back at night. This can create an environment that is far too hot for these cool-loving tropicals.
Garden Borders and Pathways
Tuberous begonias are wonderful for edging garden paths. Because they stay relatively compact—usually 12 to 18 inches tall—they won't block the view of other plants behind them. Planting them along a shaded walkway allows you to enjoy their intricate flower shapes up close every time you pass by.
Key Takeaway: Success with begonias depends on "Right Plant, Right Place." Match the plant's need for cool, filtered light and perfect drainage to a sheltered spot in your landscape for a stress-free growing season.
Maximizing Impact in Containers
Many gardeners find that the best place to plant tuberous begonias is in a container. Containers give you complete control over the soil and drainage. They also allow you to move the plants if you realize a spot is getting too much sun or wind.
Porches and Covered Patios
A covered porch or patio is one of the most reliable places for begonias. The roof of the porch provides permanent shade, protecting the foliage from sunscald. If your porch faces east or north, you have the ideal begonia environment.
Begonias in these locations often look more pristine because they are protected from heavy rain, which can sometimes bruise the large, delicate flower petals. Just remember that plants under a roof do not get rainwater, so you will need to check the soil moisture daily.
The Charm of Hanging Baskets
If you are planting cascading or pendula varieties, a hanging basket is the best home for them. These varieties have stems that naturally arch downward. Placing them in a hanging basket at eye level allows you to see the flowers as they spill over the edges.
When choosing a spot for a hanging basket, make sure it is not in a high-wind area. Hanging baskets dry out faster than pots on the ground, so a spot that is easy to reach with a watering can or hose is a practical win.
Window Boxes and Urns
Upright begonias on a shaded side of a house are a classic look. Begonias fill these boxes with lush foliage and a constant stream of color. For a formal look, try planting upright begonias in tall urns on either side of a shaded entryway. The elevation makes the large blooms even more impressive.
What to do next:
- Select pots with plenty of drainage holes.
- Use a lightweight potting mix to ensure the tubers can breathe.
- Place containers in areas with good air circulation to keep the leaves dry.
- Group several pots together to create a lush, tropical feel on your patio.
Considering Airflow and Humidity
Tuberous begonias are tropical plants, so they appreciate a certain amount of humidity. However, they also need good airflow to stay healthy. This is a delicate balance that is easy to achieve once you know what to look for.
The Role of Air Circulation
When air becomes stagnant and still, moisture can sit on the leaves for too long. This sometimes leads to powdery mildew, which looks like a dusting of white flour on the foliage.
To prevent this, avoid "crowding" your begonias. Whether they are in the ground or in pots, give them enough space so that air can move freely between the plants. If you are planting them in a garden bed, a spacing of 10 to 12 inches is usually perfect. This allows the air to circulate while still giving you a full, lush look once the plants mature.
Managing Humidity
In very dry climates, begonias may struggle with the low humidity. You can improve their "where" by placing them near a water feature or grouping them with other plants. Plants naturally release moisture through their leaves, so grouping them creates a slightly more humid microclimate.
If you are growing them on a balcony or patio in a dry area, setting the pots on a tray filled with pebbles and a bit of water can also help. Just make sure the bottom of the pot is sitting on the pebbles and not in the water itself.
Protection from Wind
The stems of tuberous begonias are thick and succulent, which makes them quite brittle. A strong gust of wind can easily snap a stem right at the base.
When choosing a planting site, look for areas that are naturally sheltered. This might be behind a low hedge, near a fence, or in a corner of the patio. If you are planting tall, upright varieties with very large flowers, you might want to choose a spot where it is easy to add a small bamboo stake for extra support.
Regional Nuances for Planting Sites
The "perfect spot" for a begonia in Maine might be different from the "perfect spot" in Georgia. Your local climate plays a big role in where you should place your plants.
Northern Gardens
In cooler northern climates, tuberous begonias can often handle a bit more sun. Because the ambient temperature is lower and the sun is less intense, a spot with four to five hours of morning sun can produce very robust plants. In these regions, the challenge is often the short growing season. Starting your tubers indoors in late winter allows you to have blooming plants ready to move outside as soon as the weather is warm. To check your local growing conditions, see the hardiness zones.
Southern Gardens
In the South, heat is the biggest factor. Tuberous begonias may struggle if the nights stay very hot (above 75°F) for long periods. In these areas, finding the coolest spot in the yard is essential.
Deep, bright shade is better than any direct sun in the South. Look for locations near stone patios or water features that might stay a few degrees cooler than the rest of the garden. Some southern gardeners find that Non-Stop varieties are particularly resilient in warmer temperatures.
Timing Your Planting
No matter where you live, the most important rule about "where" to plant is "when." Begonias are very sensitive to cold. At Longfield Gardens, we always recommend waiting until the soil is warm and the danger of frost is completely gone.
Nighttime temperatures should consistently stay above 50°F before you move your plants outdoors. In many parts of the country, this is usually in late May or early June. If a surprise cold snap is predicted, be ready to move your pots into a garage or cover your garden plants with a light cloth. For more on timing and delivery windows, see our Shipping Information.
Maximizing Beauty with Companion Plants
Where you plant your begonias also involves what you plant with them. Choosing the right neighbors can make the colors of your begonias pop and create a more professional-looking garden.
Textural Contrasts
Begonias have broad, often jagged leaves. They look fantastic when paired with plants that have different textures. Consider planting them near ferns, which have delicate, lacy fronds. The contrast between the bold begonia leaves and the fine fern foliage is visually stunning.
Foliage Neighbors
Since begonias thrive in the shade, they share the same space as other shade-loving favorites. Hostas are excellent companions. You can plant colorful begonias in front of large, blue or green-leaved hostas. The hostas provide a solid backdrop that makes the begonia flowers stand out.
Coleus is another great partner. Since coleus comes in almost every color imaginable, you can find a variety that perfectly complements the hue of your begonias. For example, a lime-green coleus looks incredible next to a bright red or orange begonia.
Creating Layers
In a garden bed, think about the "vertical" location. Plant taller shade perennials, like astilbe or bleeding hearts, in the back. Place your tuberous begonias in the middle layer, and use low-growing plants like impatiens or sweet alyssum as a "carpet" in the front. This creates a full, layered look that makes your shade garden feel like a professional landscape.
Managing Your Begonia's Life Cycle
The "where" of planting also changes as the seasons turn. Because tuberous begonias grow from a tuber, they have a natural cycle of growth and rest.
Summer Growth
During the height of summer, your main job is to keep the location consistent. Begonias don't like to be moved around once they are established. Keep up with watering and fertilizing, and remove the spent blooms to keep the plant looking tidy. If you want a fuller overview of the plant itself, All About Begonias is a helpful place to start.
Late Summer Transitions
As the days get shorter in late August and September, you might notice the flowering starts to slow down. This is a natural signal that the plant is preparing for dormancy. You can keep them in their summer spot until the leaves start to turn yellow or until the first light frost.
Winter Storage
In most of the United States, tuberous begonias cannot stay outside during the winter. Once the foliage has died back, you will need to "move" your begonias to a new location: indoors.
Dig up the tubers, let them dry for a few days in a protected spot, and then store them in a cool, dark, and dry place (about 45°F to 50°F) for the winter. A basement or a cool closet is usually perfect. If you want extra growing tips for the offseason, Tips for Growing Tuberous Begonias can help you prepare for next year. This allows the tuber to rest so it can be replanted in the same beautiful outdoor spots next spring.
Key Takeaway: Thinking of your begonia's location as a year-round plan—from the shaded patio in summer to the cool closet in winter—ensures you can enjoy these spectacular flowers year after year.
Conclusion
Finding where to plant tuberous begonias is a simple matter of matching their tropical needs to your home's unique environment. By prioritizing dappled light, excellent drainage, and protection from the wind, you create a space where these plants can truly shine. Whether they are cascading from a hanging basket on your porch or brightening a shaded border under a favorite tree, begonias bring a level of elegance and color that few other shade plants can match.
At Longfield Gardens, we believe that gardening should be a source of joy and relaxation. By following these basic principles of site selection, you are setting yourself up for a successful and beautiful growing season. If you want to learn more about the company behind these bulbs, our 100% Quality Guarantee explains how we stand behind our plants. Remember that every garden is a little different, and half the fun is discovering the special microclimates in your own backyard.
- Seek out dappled shade or gentle morning sun.
- Ensure the soil or potting mix drains quickly and thoroughly.
- Provide shelter from strong winds to protect brittle stems.
- Wait for warm weather before moving your plants outdoors.
Planting begonias is one of the easiest ways to transform a quiet, shady corner into a highlight of your home. With the right spot and a little bit of care, you will be rewarded with stunning, rose-like blooms all summer long.
FAQ
Can tuberous begonias grow in full sun?
Tuberous begonias generally cannot handle full sun, especially in the heat of the afternoon. Their leaves and delicate flower petals are prone to sunburn, which appears as brown, crispy edges. In northern climates, they may tolerate a bit more morning sun, but they always perform best with some level of shade or filtered light.
What is the best side of the house to plant begonias?
The east side of a house is typically the best location for tuberous begonias. This spot provides the plants with gentle morning sunlight and protects them from the intense, drying heat of the afternoon. The north side of a house is also a great choice, as it provides consistent shade throughout the day.
Do I need to plant my begonias in pots or the ground?
Tuberous begonias thrive in both containers and garden beds, so the choice depends on your space. Containers offer the advantage of perfect drainage and the ability to move the plants if the weather becomes too harsh. For more general growing advice, How to Plant and Care for Begonias: A Complete Grower's Guide is a useful reference. Planting in the ground is excellent for creating colorful borders, provided the soil is loose and well-drained.
How much space do begonias need between plants?
When planting tuberous begonias, it is best to space them about 10 to 12 inches apart. This gives each plant enough room to reach its full size while ensuring there is plenty of air circulation between them. Good airflow is essential for preventing common issues like powdery mildew and keeping the foliage healthy.