Table of Contents
- Introduction
- What Are Weeping Begonias?
- Selecting High-Quality Tubers
- Timing and Starting Indoors
- How to Plant Weeping Begonia Tubers
- Choosing the Right Location
- Watering and Feeding for Maximum Blooms
- Designing with Weeping Begonias
- Simple Solutions for Healthy Plants
- Saving Tubers for Next Year
- Conclusion
- FAQ
Introduction
There is a unique kind of joy that comes from watching a hanging basket transform into a lush, overflowing curtain of color. Weeping begonias are the stars of the shaded porch, offering a graceful, cascading habit that traditional upright flowers simply cannot match. With their rose-like blooms and soft, trailing stems, these plants turn even the simplest garden corner into a sophisticated retreat.
At Longfield Gardens, we want to help you achieve that high-end look with ease. These tropical beauties are surprisingly low-maintenance once you understand their basic needs for light, water, and soil. Whether you are a seasoned gardener or just starting your first container garden, weeping begonias like Begonia Nonstop Mix provide a rewarding experience with nonstop blooms from midsummer all the way to the first frost.
In this guide, we will cover everything you need to know about selecting, planting, and caring for these elegant pendulous plants. By following a few simple steps, you can enjoy a spectacular display of trailing flowers all season long. Growing weeping begonias is a wonderful way to bring vibrant life to the shaded spots of your home and landscape.
What Are Weeping Begonias?
When we talk about weeping begonias, we are specifically referring to tuberous begonias with a pendulous or trailing growth habit. While many begonias grow upright on sturdy stems, the "pendula" varieties are bred to have flexible, arching stems that naturally drape over the edges of pots and baskets.
These plants grow from a thickened underground stem called a tuber. The tuber acts as a storage unit, holding the energy the plant needs to produce its spectacular flowers. In the world of begonias, there is a vast range of flower forms, from single petals that look like wildflowers to lush, multi-petaled double blooms that mimic roses or camellias.
The foliage is equally attractive. Most weeping varieties feature asymmetrical, heart-shaped leaves with slightly jagged edges. The leaves are often a deep, forest green, though some varieties may have a hint of bronze or burgundy. This dark foliage provides a perfect backdrop for the bright, luminous colors of the blossoms, which come in shades of white, yellow, pink, orange, and red.
Selecting High-Quality Tubers
The secret to a full, impressive hanging basket starts with the quality of the tuber. Much like a larger bulb produces a bigger tulip, a larger begonia tuber produces a more vigorous plant with more stems and a higher flower count. When you are shopping for your garden, look for tubers that feel heavy for their size and firm to the touch, similar to a fresh potato.
We provide premium tubers that are sized to ensure they have enough stored energy to jumpstart the growing season. Smaller, "bargain" tubers may eventually bloom, but they often take much longer to fill out a container and may produce fewer trailing stems. Starting with a large, healthy tuber is one of the easiest ways to guarantee a "thriller" effect in your garden displays.
Avoid any tubers that feel soft, mushy, or exceptionally light, as these may have dried out or suffered from poor storage. If you see small, pinkish "eyes" or buds starting to emerge from the concave (hollow) side of the tuber, that is a great sign. It means the plant is already waking up and ready to grow.
Timing and Starting Indoors
Weeping begonias are tropical plants at heart. They love warmth and are very sensitive to cold temperatures. Because they have a relatively long growing season, many gardeners choose to start their tubers indoors in late winter or early spring. This gives the plants a head start so they are ready to begin blooming as soon as they move outside.
When to Start Your Tubers
The best time to start begonia tubers indoors is about 8 to 12 weeks before the average last frost date in your area. For most regions in the United States, this means planting them in pots indoors sometime in March or April. Starting them early allows the tuber to develop a strong root system and several inches of top growth before the summer heat arrives.
The Indoor Setup
You do not need a greenhouse to start your begonias. A warm room with a bright window or a simple fluorescent shop light will work perfectly. The goal is to provide consistent warmth—ideally between 65°F and 75°F—and enough light to prevent the new stems from becoming too "leggy" or stretched out.
Key Takeaway: Starting your begonias indoors 8–12 weeks before the last frost ensures you have flowers by early summer rather than late August.
How to Plant Weeping Begonia Tubers
Planting begonias is a straightforward process, but getting the orientation and depth right is the most important part of the job. Because the tuber looks like a brown, slightly fuzzy disk, it can be confusing to tell which side is the top.
Determining Which Side is Up
Look for the side of the tuber that has a slight depression or a "bowl" shape. This concave side is the top. The sprouts will emerge from the small bumps or "eyes" located inside this hollow area. The rounded, smooth side is the bottom, where the roots will grow. If you find a tuber that is flat on both sides, look for any remnants of last year's stems; those will mark the top.
Soil and Container Selection
Use a high-quality, well-draining potting mix. Avoid using heavy garden soil in containers, as it can pack down too tightly and prevent the roots from breathing. A mix that includes peat moss or coco coir is ideal because it holds moisture while remaining light and airy.
- Fill your container or a starting tray with moistened potting soil.
- Place the tuber on the surface with the hollow side facing up.
- Press the tuber gently into the soil so it is mostly submerged, but only cover the top with about half an inch to an inch of soil.
- If you are planting directly into a hanging basket, space multiple tubers about 3 to 4 inches apart to ensure a full, lush look.
Initial Watering
After planting, water the soil once to settle it around the tuber. Then, be patient. One of the most common mistakes is overwatering before the plant has leaves. Until you see green sprouts poking through the soil, keep the mix only slightly damp. Too much water at this early stage can cause the tuber to rot before it ever has a chance to grow.
Choosing the Right Location
Once the weather warms up and the danger of frost has passed, it is time to move your weeping begonias to their permanent summer home. "Right plant, right place" is a core principle for gardening success, and for begonias, that place is usually in the shade.
Light Requirements
Weeping begonias thrive in filtered light or partial shade. They are the perfect solution for north-facing porches, under the canopy of large trees, or tucked away on a shaded balcony. While they can handle some morning sun, the intense heat of the afternoon sun can scorch their delicate leaves and cause the flowers to wilt.
If your begonias are not blooming well, they might need a bit more light. "Deep shade" (where no direct light ever reaches) can result in lots of green leaves but very few flowers. A spot that receives "dappled" sunlight throughout the day is often the sweet spot for maximum bloom production.
For a closer look at placement, see Is a Begonia a Shade Plant?.
Temperature and Wind Protection
Because weeping begonias have succulent stems that are heavy with water, they can be somewhat brittle. It is best to hang your baskets in a location that is protected from strong, gusty winds. A heavy summer storm can occasionally snap a trailing stem, so providing a little shelter will keep the plant looking its best.
Remember that these are heat-loving plants. Do not move them outdoors permanently until nighttime temperatures are consistently above 50°F. If a surprise late-spring cold snap is forecast, simply bring your baskets into the garage or house for the night.
Watering and Feeding for Maximum Blooms
Begonias have a reputation for being somewhat thirsty, but they actually prefer a "deep water, then dry out" approach. Because their stems and tubers store water, they are more resilient than they look.
How to Water Correctly
Check your containers daily during the heat of summer. Stick your finger into the soil; if the top inch feels dry, it is time to water. When you water, do so thoroughly until water runs out of the drainage holes at the bottom of the pot. This ensures the roots at the very bottom of the container are getting the moisture they need.
Try to water the soil directly rather than pouring water over the foliage. Wet leaves in a shaded environment can sometimes lead to powdery mildew or other fungal issues. Watering in the morning is also helpful, as it allows any accidental splashes on the leaves to dry out during the day.
If you want a deeper watering reference, visit How to Water Begonia Plants.
Fertilizing for Success
To keep that "curtain of color" going from July until October, your begonias will need a little extra nutrition. They are heavy feeders because they are putting so much energy into constant flower production.
- Early Season: Use a balanced, water-soluble fertilizer every two weeks once the plant has several sets of leaves.
- Mid-Summer: Switch to a fertilizer with a higher middle number (phosphorus) to encourage more blooms.
- Application Tip: It is often better to use a half-strength fertilizer solution every week than a full-strength one every two weeks. This provides a steady stream of nutrients without the risk of burning the roots.
What to do next:
- Check the soil moisture every morning.
- Remove faded flowers to keep the plant looking tidy.
- Apply a half-strength liquid fertilizer once a week during the peak of summer.
Designing with Weeping Begonias
The cascading nature of weeping begonias makes them incredibly versatile in garden design. While they look stunning on their own, they also play well with others in mixed arrangements.
The "Thriller, Filler, Spiller" Method
In container design, we often use the "thriller, filler, spiller" formula. Weeping begonias are the ultimate "spillers." To create a professional-looking arrangement, try planting an upright "thriller" in the center of a large pot—such as a Coleus or a small Caladium—and surround it with weeping begonias. As the begonias grow, they will trail over the edges, creating a soft, finished look.
Color Coordination
Because weeping begonias come in such saturated colors, you can use them to set the mood for your outdoor space:
- Romantic: Mix white and pale pink cascading begonias with silver-foliaged plants like Dichondra 'Silver Falls'.
- Tropical: Combine bright orange and yellow begonias with dark-leaved sweet potato vines.
- Classic: Use a single color, like vibrant red, in a series of matching black hanging baskets for a clean, high-contrast look.
For a bold basket option, take a look at Begonia Upright Double Bertini.
Selecting the Right Container
The container you choose affects how often you will need to water. Terra cotta pots are beautiful but porous, meaning the soil dries out faster. Plastic or glazed ceramic pots hold moisture longer, which can be a benefit for begonias. Regardless of the material, ensure there is at least one large drainage hole. If water sits in the bottom of the pot, the tuber may rot.
Simple Solutions for Healthy Plants
Gardening is a learning process, and weeping begonias are generally very forgiving. If your plant isn't looking its best, the solution is usually found in one of three areas: light, water, or nutrients.
Leggy Growth
If your begonia stems are very long with a lot of space between the leaves, it is likely asking for more light. Move the container to a slightly brighter spot. You can also pinch back the tips of the stems early in the season to encourage the plant to branch out and become bushier.
Dropping Buds
It can be disappointing to see flower buds fall off before they open. This is usually a sign of stress, often caused by either a sudden swing in temperature or the soil staying too wet for too long. Check the drainage holes to make sure they aren't blocked and try to keep the watering schedule as consistent as possible.
Powdery Mildew
If you see a white, flour-like dust on the leaves, it is likely powdery mildew. This happens when there is high humidity and poor air circulation. To fix this, move the plant to a spot with better airflow and be careful to water only the soil, not the leaves. You can also snip off the most affected leaves to stop the spread.
For more help with container growing, see Can Begonias Be Planted in Pots?.
Saving Tubers for Next Year
One of the most rewarding aspects of growing weeping begonias is that you can save the tubers and replant them year after year. As the tubers age, they actually get larger and produce even more spectacular displays.
The Overwintering Process
When the temperatures begin to drop in the fall, the begonia will naturally start to slow down. Before the first hard frost, bring the containers into a protected area like a porch or garage.
- Stop Watering: Let the soil dry out completely. This signals to the plant that it is time to go dormant.
- Remove Foliage: Once the stems have turned yellow or brown and feel loose, they should easily pull away from the tuber. If they don't pull away easily, let them dry a bit longer.
- Lift and Clean: Gently dig the tuber out of the dry soil. Brush off any excess dirt, but do not wash them with water, as they need to stay dry.
- Storage: Place the tubers in a cardboard box filled with peat moss, sawdust, or even wrapped in individual pieces of newspaper.
- Location: Store the box in a cool, dark, and dry place where the temperature stays around 40°F to 50°F. A cool basement or an attached garage that doesn't freeze is perfect.
When you are ready to plan next season, the Hardiness Zone Map can help you time your spring start.
In the spring, simply pull the tubers out of storage, check for firmness, and start the process all over again!
Conclusion
Growing weeping begonias is an achievable and joyful way to add elegance to your home's shaded areas. These plants ask for very little—just some protection from the sun, consistent moisture, and a little bit of food—in exchange for a breathtaking display of cascading color. By starting with high-quality tubers and following the simple steps of starting them indoors and providing the right light, you can enjoy a professional-looking garden all summer long.
We are proud to provide home gardeners with the premium plants and practical advice needed to succeed. At Longfield Gardens, our goal is to make your gardening journey as rewarding as the blooms themselves. We stand behind our quality, and we are here to support you as you create your most beautiful garden yet. If you ever need help with an order, our Contact Us page is always available.
Next Steps for Success:
- Choose a few of your favorite colors from our collection of weeping begonias.
- Gather your potting mix and containers about 8 weeks before your last frost.
- Start your tubers indoors to get a jump on the summer season.
- Enjoy the stunning, trailing transformation of your shaded spaces!
FAQ
Can I grow weeping begonias in full sun?
Most weeping begonias prefer partial to full shade, especially in warmer climates. While they can tolerate some gentle morning sun, direct afternoon sunlight is usually too intense and can scorch the leaves and flowers. If you live in a very cool northern climate, they may handle more sun, but filtered light is always the safest bet for lush growth.
For more background on light exposure, see Where to Plant Begonias: Sun or Shade?.
Why are my begonia flowers falling off?
Begonias may drop their buds or flowers if they experience stress, such as extreme heat, overwatering, or underwatering. It is also common for the plant to drop older flowers as it makes room for new ones. To encourage more blooms, ensure the soil stays consistently moist but not soggy, and feed the plant with a phosphorus-rich fertilizer.
Do I need to prune my weeping begonias?
Weeping begonias generally do not require heavy pruning. However, you can pinch off the growing tips of the stems early in the season if you want the plant to grow fuller and more branched. Additionally, removing spent flowers (deadheading) helps keep the plant looking tidy, though many modern varieties are "self-cleaning" and drop their old blooms naturally.
Are begonia tubers toxic to pets?
Yes, begonias are toxic to dogs and cats if ingested, with the tubers being the most toxic part of the plant. It is always a good idea to keep your potted plants and stored tubers out of reach of curious pets. If you suspect your pet has eaten part of a begonia, contact your veterinarian for guidance.
For more general begonia care, you can also read Can You Plant Begonias in the Ground? or How Do You Plant Begonias?.