Introduction
Finding the perfect flower for a shady corner can sometimes feel like a puzzle. Begonias are the colorful, reliable answer that gardeners have turned to for generations. These versatile plants thrive where many others struggle, offering lush foliage and brilliant blooms from early summer right through the first frost. At Longfield Gardens, we love how begonias bring a tropical, high-end look to porches, patios, and garden beds with very little effort.
This guide is designed to help you succeed with begonias, whether you are planting them in the ground or in decorative containers. We will cover the different types of begonias, how to get your tubers off to a strong start, and the simple steps for keeping them healthy all season. By focusing on a few basics like light and drainage, you can enjoy a spectacular show of color that lasts for months.
Growing begonias is a rewarding way to brighten your landscape and create a more beautiful outdoor living space.
Understanding the Different Types of Begonias
Before you start digging, it is helpful to know which type of begonia you are growing. While there are thousands of species, most home gardeners choose from four main groups. Each has its own personality and growth habit.
Tuberous Begonias
These are the stars of the summer shade garden and the primary focus for most bulb enthusiasts. Tuberous begonias grow from a thickened underground stem called a tuber. They are famous for their large, rose-like flowers and come in two main styles: upright and trailing. Upright varieties are perfect for window boxes and garden borders. Trailing varieties, like the 'Double Delight' series, look stunning cascading over the edges of hanging baskets.
Wax Begonias
Also known as bedding begonias, these are compact plants often used to edge walkways or fill mass plantings. They have waxy, succulent-like leaves that come in green or bronze. Their flowers are smaller than tuberous types but are produced in massive quantities. These are very easy to grow and can handle more sun than most other begonias.
Rex Begonias
If you love dramatic foliage, Rex begonias are for you. While they do produce small flowers, they are grown almost exclusively for their leaves. You will find patterns of silver, purple, burgundy, and emerald green. They are popular as both houseplants and "thriller" plants in shaded outdoor containers.
Cane-Stemmed Begonias
You might recognize these by their common name, "Angel Wing" begonias. They have long, upright stems with joints that look a bit like bamboo. The leaves are often shaped like wings and frequently feature silver spots. These are excellent for large pots and can grow quite tall if given the right support.
Key Takeaway: Match the begonia type to your goal. Choose tuberous for big blooms, wax for borders, and Rex or cane-type for spectacular foliage.
Finding the Best Location for Your Begonias
Success begins with "right plant, right place." Begonias are famous for their love of shade, but their light requirements are actually a bit more nuanced.
Sunlight and Exposure
Most begonias prefer filtered light or dappled shade. Think of the light found under a tall tree or on a porch that gets gentle morning sun. Intense, direct afternoon sun can scorch the delicate leaves and cause the flowers to wilt.
If you have a very sunny spot, look for wax begonias with bronze foliage, as they are naturally more sun-tolerant. For tuberous begonias, about four hours of morning sun followed by afternoon shade is the ideal recipe for success. In northern climates, begonias can often handle more sun than they can in the hot, humid South. For more detailed guidance, see this begonia light and sun guide.
Soil and Drainage
The "quiet winner" in begonia care is drainage. "Drainage" simply means how fast water leaves the soil. Begonias have fleshy stems and roots that hold a lot of moisture. If they sit in soggy soil for too long, they can develop rot.
For garden beds, the soil should be rich in organic matter. If your soil stays wet for hours after a rain, it is best to plant your begonias in raised beds or containers. In pots, always use a high-quality, well-draining potting mix. Avoid heavy garden soil in containers, as it packs down too tightly and prevents air from reaching the roots.
How to Plant Tuberous Begonias
Planting tuberous begonias is a simple process, but timing and orientation are the two most important factors. Because these are tropical plants, they have no tolerance for frost.
When to Plant
Wait until the soil is warm and the danger of frost has passed before planting outdoors. In most regions, this is late May or early June. A good rule is to wait until nighttime temperatures consistently stay above 60°F. If you put them out too early, the cold soil can stunt their growth or cause the tubers to rot before they even start.
Which Way is Up?
When you look at a begonia tuber, you will notice that one side is slightly indented or hollowed out, like a shallow bowl. This indented side is the top. This is where the leaf sprouts will emerge. The rounded, smooth side is the bottom, where the roots will grow.
Planting Depth and Spacing
In the garden, plant the tubers about 10 to 12 inches apart to allow for good airflow. Dig a shallow hole and place the tuber with the indented side facing up. Cover it with no more than one inch of soil. If you are planting in a container, you can space them a bit closer—about 4 to 6 inches apart—for a fuller look. For additional guidance, see how deep to plant begonias.
What to do next:
- Check the weather forecast for your "last frost date."
- Inspect your tubers to identify the indented (top) side.
- Prepare your pots or garden beds with fresh, loose soil.
Starting Begonias Indoors for Earlier Blooms
Many gardeners in northern zones choose to start their begonia tubers indoors. Since begonias can take a few weeks to wake up and start growing, starting them early gives you a "head start" on the flowering season. This often results in plants that start blooming by early summer rather than mid-summer.
The Indoor Setup
About 8 to 12 weeks before the last expected frost, place your tubers in a shallow tray or individual small pots. Use a moist, peat-based potting mix. Do not bury them deeply; just press them into the soil so the tops are barely covered or even slightly exposed.
Light and Warmth
Keep the tray in a warm spot (around 70°F). They do not need bright light until the first green sprouts appear. Once you see growth, move them to a bright window or place them under grow lights. Be careful not to overwater at this stage. The soil should be damp like a wrung-out sponge, not soaking wet.
Moving Outdoors
Before moving your indoor-started begonias to the garden, they need to be "hardened off." This means gradually introducing them to the outdoor environment. Start by placing them in a sheltered, shady spot for an hour or two each day, slowly increasing the time and light exposure over a week. This prevents the leaves from getting "sunburned" by the sudden change in light intensity.
Growing Begonias in Containers and Hanging Baskets
Begonias are perhaps the most popular choice for shade-loving containers. Their mounding or trailing habits make them ideal for filling pots with color.
Choosing the Right Pot
Always ensure your container has at least one drainage hole. If the pot is decorative and lacks a hole, use it as a "cachepot"—place the begonia in a simple plastic nursery pot with holes, then set that inside the decorative one. This allows you to remove the inner pot to drain away excess water. For more container-specific advice, read how to grow tuberous begonias in pots.
Potting Mix Tips
Use a potting mix that contains perlite or vermiculite (those little white "rocks"). These materials help keep the soil airy and light. We recommend adding a bit of compost to the mix to provide a steady supply of nutrients.
Creating a "Thriller, Filler, Spiller" Display
Begonias play several roles in a container design:
- Thriller: Use an upright tuberous begonia or a tall cane-stemmed variety as the center focal point.
- Filler: Compact wax begonias or Rex begonias fill the space around the base with interesting textures.
- Spiller: Trailing begonias, like the 'Double Delight' varieties, hang over the edges to soften the look of the pot.
Essential Care: Water, Feed, and Maintenance
Once your begonias are established, they are relatively low-maintenance. However, a little consistent care goes a long way in extending the bloom season.
Watering Correctly
The goal is to keep the soil evenly moist but never soggy. The best way to check is to stick your finger about an inch into the soil. If it feels dry, it is time to water.
Try to water at the base of the plant rather than over the leaves. Getting the foliage wet, especially in the evening, can encourage powdery mildew. In hanging baskets, you may need to water more frequently, as these dry out much faster than garden beds.
Feeding for More Flowers
Begonias are "heavy feeders," meaning they use a lot of energy to produce those constant blooms. Start fertilizing once the plant has several sets of leaves. A balanced, water-soluble fertilizer applied every two weeks works well. Alternatively, you can use a slow-release granular fertilizer at planting time. If you notice the leaves turning pale yellow but the veins remain green, the plant might need a boost of nutrients.
Deadheading and Grooming
"Deadheading" is the practice of removing faded flowers. Many modern begonia varieties are "self-cleaning," meaning the old flowers fall off on their own. However, picking off wilted blooms helps the plant look tidy and prevents mold from growing on old petals. You can also pinch back the tips of the stems if the plant starts to look too "leggy" or stretched out. This encourages the begonia to grow fuller and bushier.
Key Takeaway: Consistent moisture and regular feeding are the two secrets to a begonia that blooms from June until October.
Troubleshooting Common Begonia Issues
While begonias are generally easy-going, you might run into a few common hurdles. Most can be fixed by adjusting one variable at a time. This begonia growing-season guide covers additional seasonal troubleshooting tips.
Why Are My Begonias Not Blooming?
The most common cause for a lack of flowers is too much shade. While they love shade, they still need "bright" light to produce energy for blooms. If your plant is all green leaves and no buds, try moving it to a slightly brighter location. Another cause can be too much nitrogen in the fertilizer, which promotes leaf growth over flower production.
Drooping Leaves or Soft Stems
If the plant looks wilted even though the soil is wet, it is likely getting too much water. This can lead to root rot. Stop watering immediately and allow the soil to dry out significantly. If the stems feel mushy at the base, the plant may be beyond saving, but you can often take a healthy cutting from the top to start a new plant.
White Spots on Leaves
A white, dusty coating on the leaves is usually powdery mildew. This is a fungal issue caused by high humidity and poor airflow. To prevent this, space your plants further apart and avoid getting water on the leaves. If it appears, you can find simple organic sprays at your local garden center to help manage it.
How to Overwinter Begonia Tubers
In most parts of the US, begonias are treated as annuals and discarded at the end of the year. However, one of the best things about tuberous begonias is that you can save the tubers and plant them again next year! This is a great way to save money and enjoy your favorite varieties year after year. Follow this begonia overwintering guide for a detailed process.
The First Frost Signal
In autumn, when the leaves start to yellow or the first light frost hits, it is time to bring them in. The frost will blacken the foliage, but the tuber underground will be fine for a short time. Stop watering the plants and allow the soil to dry out.
Digging and Drying
Carefully dig up the tubers or remove them from their pots. Cut the stems back to about an inch above the tuber. Brush off the excess soil, but do not wash them with water—keeping them dry is key. Lay them out in a cool, dry place for about two weeks to "cure." This toughens up the outer skin.
Winter Storage
Once cured, the remaining stem should fall off easily. Place the tubers in a cardboard box or a paper bag filled with peat moss, sawdust, or shredded paper. Store them in a cool, dark, and dry place where temperatures stay between 40°F and 50°F. A basement or a crawlspace is often perfect. Check on them once or twice during the winter to make sure they aren't shriveling up or getting soft.
Designing Your Garden with Begonias
Begonias play well with others. Because they share a love for shade and moisture, they have many natural companions in the garden.
Classic Companion Plants
- Hostas: The bold, wide leaves of hostas provide a perfect green backdrop for the bright colors of begonias.
- Ferns: The airy, feathery texture of ferns contrasts beautifully with the thick, waxy leaves of begonias.
- Coleus: Since coleus comes in almost every color imaginable, you can find a variety that perfectly matches or contrasts with your begonia blooms.
- Caladiums: These "heart of the garden" plants offer stunning leaf patterns that complement the tropical vibe of begonias.
Color Palettes
For a high-energy look, mix bright red begonias (like 'Switzerland') with lime-green coleus. For a more serene, elegant space, choose white or pale pink begonias and pair them with silver-leafed plants like 'Pegasus' begonias or dusty miller.
What to do next:
- Pick a "color theme" for your shade garden.
- Choose 2–3 companion plants with similar water needs.
- Sketch a simple layout for your containers or garden beds.
Our Quality Guarantee
We want your gardening experience to be as rewarding as possible. When you order from us, we ensure your plants are true to variety and arrive in prime condition for planting. We work with trusted growers in major bulb-growing regions, including Holland, to bring you high-performing varieties that we have tested in our own trial gardens.
If your items arrive damaged or if there is a quality issue, please contact us promptly after delivery. We also stand behind the performance of our plants during their first growing season. Depending on the situation, we may offer a replacement, store credit, or a refund to ensure you are happy with your garden's results.
Conclusion
Begonias are a true gift to the shade gardener. They offer an incredible variety of colors and forms, making it easy to brighten up even the dimmest corners of your yard. By choosing the right location, ensuring good drainage, and providing a little bit of food and water, you can enjoy a lush, tropical display all summer long.
At Longfield Gardens, we believe gardening should be an enjoyable and accessible hobby for everyone. We provide the quality plants and practical support you need to turn your garden dreams into a reality. Whether you are planting a single hanging basket or a whole border of blooms, the beauty of begonias is well worth the small amount of effort they require.
- Choose the right variety for your space (upright vs. trailing).
- Wait for warm weather before planting outdoors.
- Focus on drainage to keep roots healthy.
- Feed regularly to encourage nonstop blooming.
Ready to start your shade garden? Explore premium begonia tubers and find the perfect match for your home today.
FAQ
Do begonias need to be deadheaded?
While many modern begonias are self-cleaning, removing faded flowers manually helps the plant look its best. It also prevents old petals from falling onto the leaves and causing mold or rot in humid weather. Gently pinching off the spent blooms encourages the plant to put its energy back into creating new flowers.
Can begonias grow in full sun?
Most begonias prefer partial shade or filtered light, but some varieties are tougher than others. Wax begonias, especially those with darker bronze-colored leaves, can handle more direct sunlight than tuberous begonias. In northern states, begonias can often tolerate more sun than they can in the hot, intense heat of the southern US.
Why are my begonia leaves turning yellow?
Yellow leaves are usually a sign of a watering issue—either too much or too little. Check the soil moisture by sticking your finger an inch deep; if it is soaking wet, hold off on watering and check your pot's drainage. If the soil is bone-dry and pulling away from the edges of the pot, your plant likely needs a deep drink.
Are begonias toxic to pets?
Yes, begonias contain calcium oxalates which can be toxic if ingested by cats or dogs. The most toxic part of the plant is the tuber (the underground portion). It is a good idea to keep these plants in hanging baskets or on high surfaces out of reach of curious pets. Always consult a veterinarian if you suspect your pet has eaten any part of a garden plant.
