Table of Contents
- Introduction
- Understanding Begonias in the Garden
- Choosing the Right Begonia for Your Outdoor Space
- The Perfect Outdoor Environment
- When to Move Begonias Outdoors
- Planting and Spacing Tips
- Keeping Your Begonias Beautiful All Summer
- Bringing Begonias Indoors for Winter
- Conclusion
- FAQ
Introduction
Imagine a shaded porch or a quiet garden corner transformed into a lush sanctuary of cascading blooms and vibrant foliage. Begonias are often the secret to this success, offering a range of colors and textures that few other plants can match. At Longfield Gardens, we see how these versatile plants bring joy to gardeners of all skill levels every season.
Whether you are looking to fill a hanging basket or add a splash of color to a garden bed, understanding the outdoor potential of begonias is the first step. These plants are famous for their reliability and long blooming season. This guide will help you decide which varieties belong in your backyard and how to help them thrive under the open sky.
Begonias are indeed excellent outdoor plants, provided you match the right variety to your specific garden conditions and local climate.
Understanding Begonias in the Garden
Most begonias are tropical or subtropical perennials by nature. In the United States, they are typically grown as annuals because they cannot survive freezing temperatures. However, during the warm months, they truly shine in the outdoor landscape. Moving them outside offers benefits like improved airflow and natural light, which often leads to larger flowers and more robust growth than they might achieve indoors.
The key to success is remembering that begonias are tender. This means they are sensitive to the cold. They thrive when the air is warm and the soil has lost its winter chill. While some gardeners enjoy them as houseplants, their performance in garden beds and patio containers is where they often reach their full potential.
Choosing the Right Begonia for Your Outdoor Space
Not all begonias are the same. Some love the deep shade of a covered porch, while others can handle a bit of morning sun. Choosing the right type for your spot ensures your gardening experience is rewarding and easy.
Tuberous Begonias for Shade
Tuberous begonias are some of the most spectacular choices for the outdoor garden. These plants grow from a thickened underground stem called a tuber. They are famous for their large, rose-like blooms and their ability to brighten up dark corners.
Varieties like the Non-Stop series are a favorite for garden beds and containers. They produce upright, bushy plants that stay covered in flowers from early summer until the first frost. If you have hanging baskets, look for trailing varieties that create a cascading habit over the sides of a pot.
Key Takeaway: Tuberous begonias are the best choice for shady areas where you want high-impact, elegant flowers that bloom continuously.
Wax Begonias for Sun and Bedding
If you need a plant that can handle more light, wax begonias (also known as fibrous begonias) are the way to go. These are often used as "bedding plants" because they stay compact and create a dense carpet of color.
Wax begonias have fleshy, waxy leaves that help them retain moisture. Varieties with bronze-colored foliage generally have the best sun tolerance. While they still appreciate some relief from the harshest afternoon heat, they are much more resilient in sunny borders than their tuberous cousins.
Cane and Angel Wing Begonias
Cane begonias, including the popular Dragon Wing varieties, provide height and structural interest. These plants have upright, bamboo-like stems and beautiful, wing-shaped leaves. They are incredibly vigorous and can easily fill a large decorative urn.
Dragon Wing begonias are particularly prized for being "self-cleaning." This means the old flowers fall off on their own, so you do not have to spend time pinching off dead blooms. They are tough, heat-tolerant, and perform beautifully in a wide range of light conditions, from part sun to full shade.
The Perfect Outdoor Environment
To get the best results, you need to think about what a begonia needs to feel at home. Most of their requirements are simple to meet if you plan ahead.
Finding the Right Light
Light is the most important factor when placing begonias outdoors. Most varieties prefer "filtered light." Think of the dappled sunlight found under a leafy tree or the bright but indirect light on a north-facing porch.
- Deep Shade: Tuberous begonias and Rex begonias thrive here.
- Partial Shade: Most varieties enjoy morning sun and afternoon shade.
- Full Sun: Only specific wax begonias with bronze leaves should be tried in full sun, and even then, they need extra water.
If you notice the leaves looking pale or scorched, the plant might be getting too much direct sun. If the plant is getting leggy and not blooming well, it likely needs a bit more light.
Soil and Drainage
Begonias have delicate root systems that do not like to sit in water. Good drainage is essential. Drainage simply refers to how fast water leaves the soil. If water pools on the surface for a long time after rain, the soil may be too heavy.
For garden beds, we recommend mixing in some organic matter like compost to lighten the soil. For containers, always use a high-quality potting mix and ensure the pot has plenty of holes in the bottom. This allows excess water to escape, keeping the roots healthy and preventing rot.
Watering Correctly
Watering is a balance. Begonias like to be consistently moist, but not soggy. A good rule is to check the soil with your finger. If the top inch feels dry, it is time to water.
During the heat of summer, plants in containers will dry out much faster than those in the ground. You may find yourself watering daily during a heatwave. When you water, try to aim for the base of the plant. Keeping the leaves dry helps prevent common issues like powdery mildew.
What to do next:
- Check your garden for areas that receive dappled shade.
- Select a high-quality potting mix for any container-grown begonias.
- Look for pots with pre-drilled drainage holes to make care easier.
When to Move Begonias Outdoors
Timing is everything when it comes to tender plants. Moving begonias outside too early can stunt their growth or damage the foliage.
Temperature Requirements
Wait until the danger of frost has passed and nighttime temperatures stay consistently above 50°F. Even if the days are warm, chilly nights can be hard on these tropical natives. If a late spring frost is predicted after you have planted them, a light frost blanket or moving containers into a garage for the night can save them.
The soil temperature also matters. Begonias grow much faster once the soil has warmed up to about 60°F. At Longfield Gardens, we time our shipping based on your USDA hardiness zone to help ensure your plants arrive when it is safe to start planting in your area.
Hardiness Zones
In USDA zones 9 through 11, begonias may survive outdoors year-round. In these warm regions, they can act as short-lived perennials. However, for most of the United States, they are treated as annuals that finish their life cycle when the cold weather returns in the fall.
Planting and Spacing Tips
Getting the spacing right makes a big difference in how your garden looks by mid-summer. Proper spacing allows for airflow, which keeps the plants healthy.
- For Bedding Plants: Space wax begonias about 6 to 8 inches apart. They will grow together to form a solid mound of color.
- For Tuberous Varieties: Space these 8 to 12 inches apart. They need a bit more room to show off their large flowers.
- For Large Containers: One Dragon Wing begonia can often fill a 12-inch pot entirely by itself. If you are mixing varieties, ensure each plant has enough room to grow without being smothered by its neighbors.
When planting tubers, place them with the hollow or indented side facing up. Cover them with only about an inch of soil. Planting them too deep is a common reason why they might be slow to sprout.
Keeping Your Begonias Beautiful All Summer
Once your begonias are established, they require very little work. They are generally "self-cleaning," meaning they drop their old flowers naturally. This keeps the plants looking tidy without much effort from you.
Feeding Your Plants
Begonias are hungry plants. Because they bloom so much, they use a lot of energy. We suggest using a balanced, water-soluble fertilizer every two to three weeks during the growing season. This provides a steady supply of nutrients to keep the foliage green and the flowers coming.
If you are growing begonias in containers, regular feeding is even more important. Nutrients wash out of the potting soil every time you water, so they need to be replaced frequently.
Managing Heat and Humidity
Most begonias love humidity. If you live in a dry climate, grouping your pots together can help create a small humid microclimate. During extreme heatwaves, your plants might look a little tired. This is normal. Continue to water them, and they will usually perk right back up once the temperatures drop in the late afternoon.
Bringing Begonias Indoors for Winter
As autumn approaches and temperatures drop, you have a choice. You can let the plants go with the first frost, or you can try to save them for next year.
Saving Tuberous Begonias
Tuberous begonias are the easiest to overwinter. When the leaves start to yellow in the fall, stop watering. Once the foliage dies back after a light frost, carefully dig up the tubers. Shake off the excess soil and let them dry in a cool, dark place for a few days. Store them in a box of peat moss or sawdust in a frost-free area like a basement. You can then restart them indoors the following spring.
Moving Potted Plants Inside
Cane begonias and Rex begonias can often transition to life as houseplants. Before the first frost, bring the containers inside. Place them in a bright spot with indirect light. Keep in mind that the dry air inside a heated home can be a shock. Using a pebble tray with water or a humidifier can help them adjust to their indoor winter home.
Key Takeaway: While begonias are usually grown as annuals, tuberous varieties offer the easy win of being stored and replanted year after year.
Conclusion
Begonias are among the most versatile and rewarding plants you can add to your outdoor garden. Their ability to thrive in shade, their self-cleaning nature, and their incredible variety of flower forms make them a favorite for many. Whether you choose the elegant, rose-like blooms of a tuberous variety or the rugged reliability of a wax begonia, you are sure to enjoy a season of effortless color.
At Longfield Gardens, we take pride in helping you find the perfect plants for your unique landscape. By following the simple steps of matching the right plant to your light and soil, you can create a stunning display that lasts from the first warm days of spring until the arrival of autumn.
"The joy of gardening with begonias is that they do so much of the work for you. Give them the right spot and a little water, and they will reward you with a spectacular show all summer long."
For your next gardening project, consider these steps:
- Identify the shade levels in your yard to choose the right variety.
- Prepare your containers with fresh, well-draining potting soil.
- Wait for the warm weather to arrive before placing your plants outdoors.
FAQ
Can begonias grow in full sun?
Most begonias prefer shade or filtered light. However, wax begonias with bronze or dark foliage are bred to handle more sun than green-leaved varieties. If you plant them in a sunny spot, ensure they receive plenty of water to compensate for the heat.
Are begonias toxic to pets?
Yes, begonias contain calcium oxalate crystals, which can be toxic to dogs and cats if ingested. The highest concentration of these crystals is usually found in the underground tubers or roots. It is best to keep these plants in hanging baskets or areas where pets cannot reach them.
Do I need to remove the dead flowers?
Most modern begonia varieties, like the Dragon Wing or Non-Stop series, are self-cleaning. This means the old blooms fall off on their own, and the plant continues to produce new ones. You can "tidy up" by picking up fallen petals, but you do not need to manually deadhead to keep the plant blooming.
Why are the leaves on my begonia turning yellow?
The most common cause of yellow leaves is overwatering. Begonias prefer soil that is moist but never soggy. Ensure your pots have drainage holes and allow the top inch of soil to dry out before you water again. Yellowing can also be a sign that the plant is getting too much direct sunlight.