Introduction
One of the most rewarding moments in gardening is watching a once-quiet corner of the yard transform into a lush, colorful retreat. If you have a shady spot that needs a boost of energy, begonias are a perfect choice. These plants are famous for their continuous blooms and tropical-looking foliage, making them a favorite for window boxes and hanging baskets. However, many gardeners wonder if they can move beyond the container and plant these beauties directly into their landscape.
The short answer is a resounding yes. Planting begonias in the ground is a fantastic way to create vibrant borders, fill gaps in shade gardens, and add texture to your flower beds. We at Longfield Gardens love how begonias perform in garden soil because they often grow larger and fuller than they do in pots. Whether you are working with the classic wax begonia or the dramatic tuberous variety, these plants are remarkably adaptable.
This guide is designed for home gardeners who want to take their begonias out of the pot and into the earth. We will cover how to select the right location, when to get them in the ground, and the simple steps you can take to ensure they bloom beautifully from early summer until the first frost. By following a few basic rules of sun and soil, you can enjoy a stunning, low-maintenance display all season long.
Choosing the Right Begonia for Your Garden Beds
Before you grab your trowel, it is helpful to know which type of begonia you are planting. While there are thousands of varieties, most gardeners will choose between three main types for in-ground planting. Each has its own personality and growth habit.
Tuberous Begonias
Tuberous begonias are the stars of the shade garden. They grow from a firm, brown tuber and produce some of the most spectacular flowers in the garden world. Some varieties have blooms that look like roses or camellias, while others have ruffled petals or unique bi-color patterns. For garden beds, you generally want to look for "upright" tuberous begonias. These have sturdy stems that hold the heavy flowers aloft, making them visible from across the yard.
Wax Begonias (Fibrous Begonias)
If you have ever seen a public park with a perfectly manicured "carpet" of red or pink flowers, you were likely looking at wax begonias. These are fibrous-rooted plants, meaning they have a standard root system rather than a tuber. They are incredibly tough and are often used as bedding plants because they stay compact and bloom prolifically. Wax begonias come with either green or bronze foliage, and the bronze-leafed varieties are particularly well-suited for spots that get a bit more sun.
Hardy Begonias
While most begonias are treated as annuals in the United States, there is one notable exception: Begonia grandis. This is a hardy perennial that can survive the winter in many regions. It features lovely heart-shaped leaves with red undersides and delicate pink flowers that appear in late summer. This is an excellent choice for a permanent shade border where you want a plant that returns year after year.
Key Takeaway Most begonias thrive in the ground. Choose upright tuberous varieties for large, dramatic flowers, or wax begonias for a low-growing, colorful border that lasts all season.
Finding the Perfect Spot: Sun and Soil
The secret to success with in-ground begonias lies in the location. Because begonias are tropical in origin, they have specific preferences for light and moisture. Getting these two factors right is the most important part of the planting process.
The Right Light
Most begonias are "shade-loving" plants, but that term can be a bit misleading. In the garden, "shade" usually means filtered sunlight or a spot that gets morning sun and afternoon shade.
- Avoid Deep Shade: If a spot is so dark that moss is the only thing growing there, begonias may struggle to produce flowers. They need some light to trigger those blooms.
- Avoid Midday Scorch: The hot afternoon sun can be too intense for the fleshy leaves of a begonia. If the leaves start to look bleached or the edges turn brown and crispy, they are likely getting too much direct light.
- The Best Balance: A spot under a high-canopy tree or on the east side of a building is usually ideal. This provides the bright light they love without the heat of the afternoon sun.
Soil and Drainage
Begonias have "succulent" stems, which means they hold a lot of water. Because of this, they are very sensitive to "drainage." Drainage simply refers to how fast water leaves the soil after a rain or watering. If the soil stays soggy for too long, the stems and roots can rot.
We recommend planting begonias in soil that is rich in organic matter but loose enough to let air reach the roots. If your garden soil is heavy clay, you can improve it by mixing in some compost or leaf mold before planting. This adds nutrients and creates the "crumbly" texture that begonias prefer.
When to Plant Begonias in the Ground
Timing is everything when it comes to begonias. Because they are tropical plants, they have no tolerance for frost. Even a light frost can turn a healthy begonia into a pile of mush overnight.
The 50°F Rule
Wait to plant your begonias outside until the danger of frost has completely passed. A good rule of thumb is to wait until nighttime temperatures are consistently above 50°F. If the air is still chilly, the plants will simply sit there and refuse to grow. They really begin to take off once the soil temperature reaches about 60°F.
Acclimating Your Plants
If you bought your begonias from a greenhouse or started them indoors, they need a little time to get used to the "real world." This process is called hardening off. Start by placing them in a sheltered, shady spot outside for a few hours a day. Gradually increase their time outdoors over the course of a week. This prevents the plants from going into shock when they are finally moved into the ground.
Step-by-Step Guide to Planting
Once the weather is warm and you have found the perfect spot, it is time to plant. The process is slightly different depending on whether you are planting a pre-grown plant or a tuber.
Planting Pre-Grown Starts
Most gardeners buy begonias in "cell packs" or small pots from a garden center.
- Prepare the Hole: Dig a hole that is the same depth as the pot and twice as wide.
- Add Nutrients: Toss a handful of compost into the bottom of the hole to give the plant a healthy start.
- Be Gentle: Begonia stems are very brittle and can snap easily. Carefully turn the pot upside down and let the plant slide into your hand.
- Set the Depth: Place the plant in the hole so the top of the root ball is level with the surrounding soil.
- Backfill: Fill in the space around the roots with soil and press down very gently with your fingers. Do not pack the soil too tightly, as the roots need oxygen.
Planting Begonia Tubers Directly
If you are planting tubers rather than started plants, the orientation matters.
- Find the "Up" Side: Tuberous begonia bulbs are shaped like small bowls or saucers. The "hollow" or indented side is the top. This is where the sprouts will emerge. The rounded side is the bottom.
- Dig a Shallow Trench: Dig a hole about 1.5 to 2 inches deep.
- Position the Tuber: Place the tuber in the hole with the hollow side facing up. If you live in an area with very heavy rain, you can tilt the tuber slightly to prevent water from pooling in the center.
- Cover: Cover the tuber with about 1 inch of soil.
- Wait to Water: If the soil is already moist, you do not need to water immediately. Wait until you see the first green sprouts poking through the soil before you begin a regular watering schedule. This prevents the tuber from rotting while it is dormant.
Spacing for Success
Give your begonias enough room to breathe. Proper spacing ensures good air circulation, which helps prevent leaf diseases.
- Wax Begonias: Space these about 6 to 8 inches apart. They will eventually grow together to form a solid mound of color.
- Tuberous Begonias: These need more room. Space them 10 to 12 inches apart to allow their large leaves and flowers to expand.
What to Do Next
- Check your local frost dates to ensure nighttime temperatures are above 50°F.
- Mix a few inches of compost into your garden bed to improve drainage and fertility.
- Identify the "hollow" side of your tubers before placing them in the ground.
- Space plants at least 6–12 inches apart, depending on the variety.
Watering and Feeding Your Garden Begonias
Once your begonias are established in the ground, they are relatively low-maintenance, but they do have a few "rules" for care.
The "Deep, Then Dry" Method
Watering is the area where most gardeners make mistakes. Begonias do best with a "deep, then dry" approach. Instead of giving them a little bit of water every day, give them a thorough soaking about once or twice a week (depending on the weather). Then, let the top inch of soil dry out before watering again.
When you water, try to aim for the base of the plant. Wetting the foliage can sometimes lead to powdery mildew, a white, dusty-looking fungus. If you can keep the leaves dry, the plants will stay much healthier.
Fertilizing for Big Blooms
Begonias are "heavy feeders," meaning they need plenty of nutrients to keep producing those large flowers.
- Early Season: Use a balanced, water-soluble fertilizer every two weeks to help the plant grow strong stems and leaves.
- Mid-Season: Once you see flower buds forming, you can switch to a fertilizer with a higher phosphorus count (the middle number on the package). This encourages more blooms.
- Consistency: Garden soil usually holds nutrients better than pots, but begonias still benefit from regular feeding through mid-August. Stop fertilizing as the days get shorter in late summer.
Managing Common Garden Challenges
Gardening is a partnership with nature, and sometimes nature brings a few challenges. Here is how to handle the most common issues for in-ground begonias.
Pests and Critters
One of the best things about begonias is that they are generally not a favorite snack for deer or rabbits. While no plant is 100% "pest-proof," begonias are a safe bet for yards with heavy wildlife pressure. However, you might occasionally see slugs or snails, especially in damp, shady areas. A thin layer of mulch or some organic slug bait can help keep your plants protected.
Brittle Stems
As tuberous begonias grow, their flowers can become quite large and heavy. In a windy spot, the stems can sometimes snap. To prevent this, you can use a small bamboo stake to support the main stem. Use a soft tie, like a piece of twine or a garden clip, to loosely attach the stem to the stake. This gives the plant the support it needs to handle a summer breeze.
What to Do When the Season Ends
As autumn approaches and temperatures start to drop, you have a decision to make. In most parts of the US, begonias will not survive the winter in the ground.
Treating Them as Annuals
Many gardeners choose to treat begonias as annuals. Once the first light frost hits and the foliage turns black, you can simply pull the plants up and add them to your compost pile. This is the easiest approach and allows you to start fresh with new varieties next spring.
Saving Your Tubers
If you have a favorite tuberous begonia that you want to keep, you can "lift" the tubers and store them indoors.
- Dig them up: After the first light frost, carefully dig up the tubers. Keep the stems attached for now.
- Cure them: Place the tubers in a warm, dry spot (like a garage or basement) for about two weeks.
- Clean them: Once the stems are completely dry, they should easily snap off the tuber. Shake off any excess soil.
- Store them: Wrap each tuber in newspaper or place them in a box of peat moss. Keep them in a cool, dark place (around 50°F) until next spring.
Creating a Beautiful Shade Border
Planting begonias in the ground allows you to play with color and texture in a way that pots don't always permit. Try pairing your begonias with other shade-loving plants to create a multi-layered look.
For a classic woodland look, plant begonias in front of large-leafed hostas. The contrast between the broad, green hosta leaves and the bright, delicate begonia flowers is stunning. If you want a more modern, textured look, mix begonias with ferns or caladiums. The lacy texture of the ferns provides a perfect backdrop for the bold blooms of the begonias.
At Longfield Gardens, we have found that begonias are one of the most versatile plants for the home landscape. They bring a level of color and elegance to the shade that few other plants can match. By giving them the right start in the ground, you can enjoy a garden that looks like a professional botanical display with very little effort.
Conclusion
Planting begonias in the ground is a simple way to bring high-impact color to the shadier parts of your yard. By matching the right variety to your space and waiting for the warmth of late spring, you set the stage for a season full of beautiful blooms. Remember to prioritize well-drained soil and avoid the harsh afternoon sun for the best results.
Whether you are lining a walkway with wax begonias or creating a focal point with large tuberous varieties, these plants are sure to reward you. We at Longfield Gardens are proud to provide the high-quality tubers and plants you need to get started. Gardening should be a source of joy and relaxation, and with begonias, achieving a stunning result is easier than ever.
Final Tips for Success
- Right Plant, Right Place: Match your begonia's light needs to the sun levels in your yard.
- Watch the Water: Let the soil dry slightly between waterings to keep roots healthy.
- Feed Regularly: Use a balanced fertilizer to keep the flower show going all summer.
- Enjoy the View: Begonias are low-maintenance stars that brighten any garden bed.
FAQ
Can I plant begonias in full sun?
Most begonias prefer shade or partial sun, but some varieties are bred for higher light levels. Bronze-leafed wax begonias are the most sun-tolerant and can handle full sun in many regions if they are kept well-watered. However, in very hot climates, almost all begonias will appreciate protection from the intense afternoon sun to prevent leaf scorch.
How deep should I plant begonia tubers in the ground?
Begonia tubers should be planted quite shallowly. Dig a hole so that the tuber sits about 1.5 to 2 inches deep, and cover the top of the tuber with no more than one inch of soil. Make sure the hollow or indented side of the tuber is facing upward, as this is where the new growth will emerge. For more detail, see How Deep Should I Plant Begonias?
Why are the leaves on my begonias turning yellow?
Yellowing leaves are usually a sign of too much water. Begonias have thick, water-storing stems and are very sensitive to soggy soil, which can cause root or stem rot. If you see yellowing, check the soil moisture; if it feels wet, stop watering and allow the top inch or two of soil to dry out completely before watering again.
Do I need to deadhead begonias planted in the ground?
Wax begonias are generally "self-cleaning," meaning the old flowers fall off on their own. Tuberous begonias, however, benefit from occasional deadheading. Removing the spent flowers and any seed pods that form will keep the plant looking tidy and encourage it to put more energy into producing new blooms rather than seeds. If you want more growing help, Longfield Gardens also has begonia care and maintenance tips, plus shipping information and our 100% Quality Guarantee for added peace of mind.
