Table of Contents
- Introduction
- Understanding the Light Needs of Double Begonias
- Evaluating Soil and Drainage Requirements
- Best Locations Based on Variety Type
- Environmental Considerations: Wind and Temperature
- Designing with Companion Plants
- Using Microclimates to Your Advantage
- Realistic Expectations for Your Site
- Managing Moisture in Your Chosen Location
- Summary of Where to Plant
- Conclusion
- FAQ
Introduction
There is a special kind of excitement that comes with watching the first rose-like blossoms of a double begonia unfurl in a shaded corner of the yard. These plants are beloved for their lush, layered petals and vibrant colors that can brighten even the quietest spots in a landscape. At Longfield Gardens, we enjoy helping gardeners discover how these versatile plants can transform a porch, patio, or garden bed into a floral showcase. Because they bloom continuously from midsummer right up until the first frost, they are one of the most rewarding additions you can make to your outdoor space.
This guide is designed to help you identify the perfect locations for your double begonias, whether you are working with a spacious backyard or a small balcony. We will cover the specific light requirements, soil needs, and environmental factors that allow these plants to thrive. By matching the right variety to the right spot, you can enjoy a season full of spectacular color. Choosing the best location for your double begonias is the most important step toward ensuring a healthy, vibrant garden all summer long.
Understanding the Light Needs of Double Begonias
When deciding where to plant double begonias, light is the single most important factor to consider. While many people categorize begonias simply as "shade plants," their needs are a bit more nuanced, and the Non-Stop Begonias collection is a good example. To produce those large, double blossoms that look like roses or camellias, the plants need a specific balance of light and protection.
The Magic of Morning Sun
The ideal spot for most double begonias, particularly upright varieties like the Non-Stop series or the large-flowered Roseform types, is a location that receives about four hours of morning sun. Morning sunlight is bright but lacks the intense heat of the afternoon. This early-day light provides the energy the plant needs for photosynthesis and flower production without scorching the delicate foliage.
If you have a garden bed or a porch that faces east, you have found a prime location. The plants will soak up the gentle morning rays and then spend the hot afternoon in the cooling shade. This prevents the leaves from developing "scald," which looks like dry, brown patches, and keeps the flowers from wilting prematurely.
Finding Filtered and Dappled Light
In areas where morning sun isn't an option, the next best thing is filtered or dappled light. This is the kind of light you find under the canopy of high-branching trees or beneath a wooden lattice or pergola. The sunlight "flickers" through the leaves, providing bright light without direct, sustained heat.
Double begonias thrive in these environments because they mimic their native high-altitude tropical habitats. If you have a spot under an oak or maple tree where the grass grows a bit thinner but it isn't completely dark, your begonias will likely be very happy there. The key is to avoid "deep shade," such as the area directly against a north-facing wall under a heavy overhang. In deep shade, the plants may grow tall and "leggy" as they reach for light, and they will produce far fewer flowers.
Avoiding the Afternoon Heat
It is best to avoid planting double begonias in spots that receive direct sun between 12:00 PM and 5:00 PM. The afternoon sun in most parts of the United States is simply too intense for their fleshy stems and water-filled leaves. If a plant is forced to endure high heat and direct sun, it will often drop its buds before they have a chance to open.
Key Takeaway: For the most flowers and the healthiest leaves, aim for a spot with 4 hours of morning sun followed by afternoon shade, or a location with bright, filtered light all day.
Evaluating Soil and Drainage Requirements
Once you have identified a spot with the right light, the next step is to look at the ground—or the pot—where the begonias will live. Double begonias have a unique root structure; they grow from tubers that act as a storage system for water and nutrients. Because of this, they are very sensitive to how much moisture stays around their roots.
The Importance of Drainage
"Drainage" is a term gardeners use to describe how quickly water moves through the soil and away from the plant's roots. Double begonias require excellent drainage. If the soil stays "soggy" (meaning it feels like a wet sponge for hours after watering), the tubers can rot.
If you are planting in garden beds, look for a spot where water does not puddle after a rainstorm. If your soil is heavy clay, which tends to hold onto water, you can improve the drainage by adding organic matter like compost or peat moss. This creates air pockets in the soil, allowing the roots to breathe and the water to move through more freely.
Soil Quality and Nutrients
These plants are "heavy feeders," meaning they use a lot of energy to produce their massive blooms. They prefer soil that is rich in organic matter. We recommend a soil that is "humus-rich," which essentially means it contains plenty of decayed plant material like compost. This type of soil stays moist enough to hydrate the plant but remains loose enough to allow for healthy root growth.
Container Soil vs. Garden Soil
If you are planting your double begonias in pots, hanging baskets, or window boxes, do not use soil from your garden. Garden soil is too heavy for containers and can easily become compacted, which "suffocates" the roots. Instead, use a high-quality, peat-based potting mix. For step-by-step container guidance, see How to Plant Begonia Tubers in Pots for Summer Blooms.
What to do next:
- Test your garden soil by digging a small hole and filling it with water; if it takes more than an hour to empty, consider a raised bed or a container instead.
- Purchase a fresh bag of potting mix for any containers to ensure the soil is free of pests and diseases.
- Mix a handful of compost into your garden beds before planting to provide a natural nutrient boost.
Best Locations Based on Variety Type
Not all double begonias grow the same way. Matching the growth habit of your specific variety to the right location will ensure the display looks its best. We generally categorize them into upright varieties and cascading (or trailing) varieties.
Upright Varieties: Beds, Borders, and Large Pots
Upright double begonias, such as the Ruffled, Fimbriata, or Begonia Upright Double Roseform Pink varieties, grow on sturdy, vertical stems. They typically reach a height of 12 to 18 inches.
- Garden Borders: These are excellent for the front of a shaded flower bed. Their consistent height creates a neat edge of color.
- Pathway Edging: Planting them along a walkway that receives morning sun creates a welcoming, colorful entrance to your home.
- Large Patio Urns: An upright begonia makes a beautiful "thriller" (the central, show-stopping plant) in a large decorative container.
Because the flowers on these varieties can be quite large and heavy—sometimes up to 5 to 8 inches across—the stems can be a bit brittle. When choosing a location for upright types, try to pick a spot that is somewhat protected from high winds to prevent the stems from snapping.
Cascading Varieties: Hanging Baskets and Window Boxes
Cascading or "pendula" begonias have a different mission. Instead of growing up, their stems naturally arch and hang downward. This makes them the perfect choice for locations where they can "spill" over an edge.
- Hanging Baskets: This is the classic home for cascading begonias, like Begonia Hanging Golden Balcony.
- Window Boxes: Planting cascading begonias in window boxes on the north or east side of a house creates a lush, curtain of color that can be enjoyed from both inside and outside the home.
- Retaining Walls: If you have a stone or timber retaining wall in a shaded part of the yard, planting these at the edge allows them to soften the hard lines of the landscape as they drape downward.
The Non-Stop Series: The Multi-Tasker
If you are looking for a variety that works almost anywhere, the Non-Stop series is a fantastic choice, and the Begonia Upright Double Superba Mix - Bulk Offer is another good option. They have a compact, mounded habit that works well in both small pots and garden beds. They are called "Non-Stop" because they are bred to bloom early and continue vigorously throughout the heat of the summer, provided they have enough shade.
Environmental Considerations: Wind and Temperature
Where you plant is about more than just sun and soil. The physical environment—the air around the plant—matters just as much.
Protecting from Wind
As mentioned earlier, double begonias have thick, succulent stems that are surprisingly fragile. A sudden, strong gust of wind can easily snap a stem laden with heavy flowers. When selecting a site, look for "natural windbreaks." This could be the side of your house, a fence, or a group of taller, sturdier shrubs. If you are planting in a very open area, you might need to use small bamboo stakes to give the upright varieties extra support.
Temperature and Airflow
Begonias are tropical plants that love humidity, but they do not like stagnant, "heavy" air. If you plant them in a corner where there is no air movement at all, they can become susceptible to powdery mildew, a fungal issue that looks like a dusting of white flour on the leaves.
The best location is one that has "good air circulation." This doesn't mean a wind tunnel, but rather a spot where the air can move gently around the plants. To help with this, make sure you don't crowd your begonias. If you are planting in a garden bed, space the tubers about 8 to 12 inches apart. This allows enough room for each plant to grow to its full size while ensuring air can reach the inner leaves.
The 50°F Rule
When deciding where to plant, you also have to think about when. Because begonias are tender, they should not be placed in their permanent outdoor location until the nighttime temperatures are consistently above 50°F. If your chosen spot is a particularly low-lying area of your yard (a "frost pocket"), you may need to wait even longer or choose a slightly higher elevation where the air stays warmer.
Designing with Companion Plants
Thinking about what will grow next to your begonias can help you determine the best location. By grouping plants with similar needs, you make your gardening chores much simpler.
The Shade Garden Palette
Double begonias pair beautifully with other shade-loving plants, and Summer Bulbs for Shady Gardens offers more ideas for matching them with cool, bright spaces. When you are looking for a spot in your garden beds, see if you have room near these common companions:
- Hostas: The broad, often blue or variegated leaves of hostas provide a calm, green backdrop that makes the bright colors of begonias "pop."
- Ferns: The delicate, lacy texture of ferns contrasts wonderfully with the bold, waxy leaves and large blossoms of the begonias.
- Caladiums: These plants are grown for their spectacular heart-shaped leaves in shades of pink, white, and red. Since they also grow from tubers and love the shade, they are the perfect "neighbors" for double begonias.
- Coleus: With endless color combinations in their foliage, coleus can be used to echo the colors of your begonia blooms.
Container Combinations
If you are planting in containers, the "Thriller, Filler, Spiller" method is a great way to choose a location, and the Assorted Bold Container for Shade Collection is an easy ready-made example. A large upright begonia serves as the "thriller" in the center. Around it, you can plant "fillers" like lobelia or bacopa, which have smaller flowers. Finally, "spillers" like creeping Jenny or sweet potato vine can hang over the edge. This type of arrangement works best on a shaded porch or a patio table where it can be seen from all sides.
Key Takeaway: Grouping begonias with companions like hostas and ferns not only looks beautiful but also ensures all your plants are happy with the same light and water levels.
Using Microclimates to Your Advantage
Every yard has "microclimates"—small areas where the temperature, light, or wind is slightly different than the rest of the property. Finding these hidden gems can help you grow the best begonias in the neighborhood.
The North Side of the House
The north side of a building is often the coolest and shadiest, and the Hardiness Zone Map can help you confirm how that fits your climate. While this might be too dark for some flowers, it is often a great spot for begonias, provided it isn't "blocked" by a dense row of evergreen trees. The reflected light from the sky is often enough to keep them blooming without the risk of heat stress.
Covered Porches and Balconies
A covered porch is almost like a custom-built home for a begonia. The roof provides the necessary shade, while the open sides allow for the airflow the plants crave. If you have a balcony that is shaded by the floor above it, you have a perfect microclimate for cascading begonias in railing planters.
Under the Eaves
Be careful when planting directly under the eaves of a house. These spots often stay dry even when it rains because the roof blocks the water. If you choose this location, you will need to be more diligent about watering your begonias manually. Conversely, avoid spots directly under a "drip line" (where water pours off the roof during a storm), as the force of the water can damage the fragile stems and wash away the soil.
Realistic Expectations for Your Site
While we want every gardener to have a yard full of blooms, it is important to remember that nature is in charge. The exact performance of your double begonias will depend on your specific weather and soil conditions.
In the Pacific Northwest or the Northeast, where summers are often cooler and more humid, your begonias might be able to handle a bit more sun than they could in the Southeast or the Midwest. If you live in a very hot, dry climate, you may find that your begonias need "deep" shade during the hottest part of the day and perhaps a bit more frequent watering to keep the humidity up around the leaves.
Gardening is a rewarding journey of observation. If you plant your begonias in a spot and notice the leaves are turning yellow or the stems are reaching toward the light, don't be afraid to move the pot to a slightly brighter location. If the leaves look scorched, move them into more shade. These small adjustments are all part of the fun and will help you learn the unique rhythm of your own garden.
Managing Moisture in Your Chosen Location
Once you have picked the spot, your main task will be managing water. Because you have chosen a location with excellent drainage (as we discussed!), you will need to keep the soil "consistently moist."
Checking the Soil
The best way to tell if your begonia needs water is the "finger test." Stick your finger into the soil up to the first knuckle. If the soil feels dry, it’s time to water. If it still feels damp, wait another day. For a deeper look at watering habits, see How Much Water Does a Begonia Plant Need?.
How to Water
When you water, aim the stream at the base of the plant, near the soil. Try to avoid getting water on the leaves and flowers. Water trapped on the leaves in a shaded area can lead to spotting or fungal issues. For more tips, see How to Water a Begonia Plant for Healthy, Vibrant Blooms.
Watering in Containers
Plants in pots and hanging baskets dry out much faster than plants in the ground. In the height of summer, a hanging basket of begonias on a porch might need water every day. If you find that your chosen spot is particularly breezy, the pots will dry out even faster. Keep a close eye on them during July and August.
What to do next:
- Set a regular time to check your begonias, such as in the morning while you have your coffee.
- If using containers, ensure they have saucers to catch excess water, but never let the pots sit in a saucer full of water for more than an hour.
- Consider using "self-watering" pots if you have a busy schedule; they have a reservoir at the bottom that helps maintain consistent moisture.
Summary of Where to Plant
Finding the right home for your double begonias doesn't have to be complicated. If you focus on a few key factors, the plants will do most of the work for you.
- Light: Look for morning sun (4 hours) or bright, dappled shade. Avoid the harsh afternoon sun.
- Drainage: Ensure the soil or potting mix allows water to move through freely.
- Protection: Pick a spot sheltered from strong winds to protect the brittle stems.
- Airflow: Space plants properly to allow air to circulate and prevent mildew.
- Variety: Use upright types for beds and large pots; use cascading types for hanging baskets and window boxes.
Conclusion
Choosing where to plant double begonias is the first step in a very rewarding gardening experience. These plants offer a level of elegance and color that is hard to match in the shade garden. By taking the time to understand their preference for morning sun, well-drained soil, and a bit of protection from the wind, you are setting the stage for a summer filled with breathtaking blooms. At Longfield Gardens, we take great pride in providing high-quality tubers that are true to variety and ready to perform in your garden. We stand behind our plants with a 100% quality guarantee, so you can plant with confidence.
- Select a spot with gentle morning light and afternoon shade.
- Improve your soil with compost or use a high-quality potting mix for containers.
- Match the begonia's growth habit (upright or cascading) to the right garden feature.
- Wait until the weather is warm before moving your plants outdoors, and check the Shipping Information page for timing by zone.
We are here to support you at every step of your gardening journey, from planning your layout to enjoying your first blossoms. Gardening is an achievable and joyful activity for everyone, and double begonias are a perfect way to bring a touch of luxury to your home.
FAQ
Can I plant double begonias in full shade?
While double begonias are shade-tolerant, "full shade" (a spot with no direct or bright reflected light) is often too dark. In these conditions, the plants may become leggy and produce very few flowers. For the best results, aim for "bright shade" or a location with a few hours of morning sun. For a broader overview, see All About Begonias.
Do double begonias grow better in pots or in the ground?
Both can work well, but many gardeners find more success in pots. Containers make it easier to provide the perfect well-draining soil and allow you to move the plant if the light levels aren't quite right. However, if your garden soil is rich and well-drained, double begonias can make a stunning border or mass planting.
Why are the buds falling off my begonia?
Bud drop is usually caused by environmental stress. The most common culprits are the soil being too wet, the soil being too dry, or temperatures being too high. If your begonias are in a spot that gets hot afternoon sun, moving them to a cooler, shadier location often solves the problem.
How much space do I need to leave between plants?
In garden beds, it is best to space double begonia tubers about 8 to 12 inches apart. This gives each plant enough room to reach its full width while ensuring there is enough airflow between them to prevent fungal diseases like powdery mildew. For containers, you can plant them slightly closer together for a fuller look, such as three tubers in a 12-inch pot. For more spacing guidance, see How Far Apart Do You Plant Begonias?.