Tips for Growing Begonias Outside Successfully

Table of Contents

1. Introduction
2. Understanding the Different Types of Begonias
3. Finding the Best Location Outside
4. When to Plant Begonias Outside
5. How to Plant Begonias: Step-by-Step
6. Essential Care for Outdoor Begonias
7. Managing Pests and Common Issues
8. Overwintering Begonias for Next Year
9. Designing with Begonias
10. Realistic Expectations for Your Garden
11. Conclusion
12. FAQ

Introduction

Walking onto a shaded porch or patio filled with the lush foliage and vibrant blooms of begonias is one of the most rewarding experiences a gardener can have. These versatile plants are famous for their ability to bring bright, tropical color to the corners of the yard where other flowers might struggle to grow. At Longfield Gardens, we want to help you transform your outdoor spaces with these dependable, long-blooming favorites that perform beautifully from early summer all the way to the first frost.

This guide is designed for home gardeners who want to understand the simple steps for growing begonias outside in containers, hanging baskets, or garden beds. We will cover the different types of begonias available, how to time your planting for the best results, and the straightforward care routines that keep them healthy. Whether you are looking for dramatic trailing flowers like Pink Balcony or stunning ornamental leaves, there is a variety that fits your landscape perfectly.

By matching the right plant to the right place and following a few basic care steps, you can enjoy a spectacular display of color all season long. For a quick shopping option, see Non-Stop Begonias.

Understanding the Different Types of Begonias

Before you start planting, it is helpful to know which type of begonia you are working with. While they all belong to the same family, different groups have unique growth habits and light preferences. Choosing the right one ensures your plants thrive in the specific conditions of your yard.

Tuberous Begonias

Tuberous begonias are the stars of the shade garden, prized for their large, rose-like flowers. These grow from a thick, potato-like underground stem called a tuber. They come in two main growth styles: upright and trailing. Upright varieties are excellent for garden borders and window boxes, while trailing types (sometimes called pendula) look stunning cascading over the sides of hanging baskets. If you want a classic upright option, Upright Double Begonias are a great place to start.

Wax Begonias

Wax begonias (Semperflorens) are some of the most common bedding plants in the United States. They have fibrous roots and shiny, waxy leaves that can be green or a deep bronze. These plants are incredibly sturdy and can often handle more sunlight than other types. They are self-cleaning, meaning the old flowers fall off on their own, making them very low-maintenance.

Rex and Rhizomatous Begonias

While many begonias are grown for their flowers, Rex begonias are grown for their spectacular foliage. Their leaves come in an incredible array of swirls, stripes, and colors like silver, purple, and burgundy. Rhizomatous begonias grow from creeping stems that sit near the soil surface. Both types are often used as houseplants but can spend the summer outdoors in shaded, humid spots to add texture to the landscape.

Cane Begonias

Commonly known as "Angel Wing" begonias because of their wing-shaped leaves, cane begonias have upright, bamboo-like stems. They produce clusters of drooping flowers and can grow quite tall if given the space. These are excellent "thriller" plants for large containers, providing height and architectural interest.

Key Takeaway Match your begonia type to your garden goal: Tuberous for big blooms, Wax for easy borders, and Rex for stunning foliage.

Finding the Best Location Outside

Success with begonias starts with placement. Most varieties are native to forest understories, which means they prefer filtered light and protection from the harsh elements. For more light-placement guidance, see Where to Plant Begonias: Sun or Shade?.

Light Requirements

Most begonias prefer partial shade or dappled sunlight. Direct, hot afternoon sun can often scorch their delicate leaves and cause the flowers to wilt. A spot that gets four to six hours of morning sun followed by afternoon shade is usually ideal.

If you have a very sunny spot, look for wax begonias with bronze-colored leaves. These varieties have a higher tolerance for sunlight and heat. Conversely, if your garden is very dark, Rex begonias can add brightness with their silver-patterned foliage, though they still need some indirect light to maintain their vibrant colors.

Soil and Drainage

Begonias need soil that stays moist but never stays soggy. "Drainage" refers to how quickly water moves through the soil. If water sits in a puddle for hours after a rain, the roots or tubers may rot. In the ground, you can improve drainage by mixing in organic matter like compost or finely ground bark. For containers, always use a high-quality potting mix and ensure the pot has at least one drainage hole at the bottom. For more on keeping moisture balanced, see How Much Water Does a Begonia Plant Need?.

Protection from the Elements

Because begonias have succulent, brittle stems, they can be damaged by high winds or heavy downpours. Placing them in a somewhat sheltered area—such as near a wall, under a porch roof, or nestled among sturdier plants—helps keep them looking their best.

When to Plant Begonias Outside

Timing is everything when it comes to these tropical plants. Begonias are very sensitive to cold and will not survive a frost.

Tracking the Temperature

We recommend waiting to move your begonias outside until the danger of frost has completely passed and the nighttime temperatures are consistently above 50°F to 60°F. If the soil is too cold, the plants will sit dormant and may struggle to grow later in the season. In many northern regions, this means waiting until late May or early June. For help matching planting time to your region, check the Hardiness Zone Map.

Starting Early Indoors

If you want flowers earlier in the summer, you can start tuberous begonias indoors about eight to twelve weeks before the last frost date. Place the tubers in a shallow tray of moist potting mix and keep them in a warm, bright spot. By the time the weather is warm enough to move them outside, you will already have established plants ready to bloom.

What to do next:

• Check your local average last frost date.
• Monitor nighttime temperatures for a week before moving plants out.
• Prepare your pots or garden beds with fresh, well-draining soil.
• Identify the sun and shade patterns in your yard.

How to Plant Begonias: Step-by-Step

Whether you are planting tubers or nursery-started plants, getting the depth and spacing right is a quiet win for garden success.

Planting Tubers

When planting begonia tubers, look for the indented or "bowl-shaped" side. This is the top where the sprouts will emerge.

1. Dig a shallow hole about 1 to 2 inches deep.
2. Place the tuber in the hole with the indented side facing up.
3. If you live in a very rainy climate, you can set the tuber at a slight angle so water does not collect in the center of the "bowl."
4. Cover with about 1 inch of soil.
5. Water lightly to settle the soil, but do not soak it until you see green sprouts appearing.

Planting Nursery Starts

If you are transplanting wax or cane begonias from nursery pots:

1. Dig a hole as deep as the root ball and twice as wide.
2. Gently remove the plant from its container and loosen the roots if they are circling the pot.
3. Set the plant in the hole so the top of the root ball is level with the surrounding soil.
4. Fill in with soil and press down gently to remove air pockets.
5. Water thoroughly immediately after planting.

Spacing for Success

Begonias need good air circulation to prevent fungal issues. Space small wax begonias about 6 to 8 inches apart. Larger tuberous or cane varieties should be spaced 10 to 12 inches apart to give them room to reach their full mature size. If you are planting from a mixed collection, Begonia Upright Double Roseform Pink & Picotee White is one of several options in the upright double group.

Key Takeaway Always plant tubers with the "hollow" side up and keep the top of the root ball level with the soil surface for started plants.

Essential Care for Outdoor Begonias

Once your begonias are settled in their outdoor home, a simple routine will keep them blooming and lush throughout the summer.

Watering Correctly

The goal is to keep the soil "evenly moist." This means the soil should feel like a wrung-out sponge. We suggest checking the soil daily, especially for plants in containers or hanging baskets, which dry out faster than the ground. For a deeper watering guide, see How Often Do You Water a Begonia Plant?.

Stick your finger about two inches into the soil. If it feels dry, it is time to water. Always water at the base of the plant rather than over the leaves. Wet foliage, especially in the evening, can lead to powdery mildew or other fungal spots. If you are caring for baskets, How to Care for a Hanging Begonia Plant has more specific tips.

Feeding Your Plants

Begonias are "heavy feeders," meaning they need a regular supply of nutrients to produce those spectacular flowers. During the active growing season, use a balanced, water-soluble fertilizer every two to four weeks. If you are growing tuberous varieties, switching to a fertilizer higher in potassium (like a tomato fertilizer) once the buds appear can help encourage more blooms.

Grooming and Pinching

While many modern varieties like the Surefire series are self-cleaning, your plants will still benefit from a little attention.

• Deadheading: For varieties that don't drop their own flowers, snip off faded blooms to encourage the plant to put energy into new buds.
• Pinching: If your cane or wax begonias are looking "leggy" (tall and thin with few leaves), pinch off the tips of the stems. This encourages the plant to branch out and become bushier.
• Cleaning: Remove any yellowing or damaged leaves to keep the plant looking tidy and to improve airflow.

Managing Pests and Common Issues

While begonias are generally easy to care for, you may occasionally run into a few hurdles. Most problems can be solved by adjusting the environment rather than using complex treatments.

Fungal Issues

Powdery mildew looks like a dusty white coating on the leaves. It usually happens when the air is humid and there isn't enough circulation. To fix this, ensure your plants aren't crowded and try to water only in the morning so the leaves have time to dry during the day.

Root and Stem Rot

If a begonia looks wilted even though the soil is wet, it may be suffering from rot. This happens when the soil stays waterlogged for too long. To prevent this, always use pots with drainage holes and avoid watering if the soil still feels moist.

Garden Pests

Snails and slugs sometimes enjoy the succulent leaves of begonias. You can deter them by using copper tape around pots or by hand-picking them in the evening. Mealybugs, which look like small bits of white cotton, can sometimes appear on the stems. These are often less of a problem outdoors where natural predators are present, but you can remove them with a steady stream of water or a dab of rubbing alcohol on a cotton swab.

Overwintering Begonias for Next Year

Since begonias are tropical, they will not survive a freezing winter in most of the United States (USDA zones 3–8). However, you don't have to start from scratch every year. You can save your plants to enjoy again next season.

Storing Tuberous Begonias

In the fall, when the leaves start to turn yellow or after the first very light frost, it is time to lift your tubers.

1. Dig up the tubers and cut the stems back to about an inch long.
2. Let the tubers dry in a shady, frost-free spot for a few days until the remaining stem bits fall off easily.
3. Shake off the excess soil.
4. Place the tubers in a cardboard box or paper bag filled with peat moss, perlite, or sawdust.
5. Store them in a cool (around 50°F), dark, and dry place like a basement or crawlspace.

Bringing Other Begonias Inside

Wax, Rex, and cane begonias can be brought indoors and kept as houseplants during the winter. Before the first frost, move the pots inside to a bright window. They may lose a few leaves as they adjust to the lower humidity and light of your home, but they will usually bounce back. Reduce your watering and stop fertilizing during the winter months while the plant is resting.

Designing with Begonias

Begonias are incredibly versatile in the landscape. Their wide range of colors and growth habits makes them perfect for various design styles.

Hanging Baskets and Containers

Trailing tuberous begonias are the classic choice for hanging baskets. Varieties like the Double Delight series offer pendulous flowers that look beautiful at eye level. For a "thriller, filler, spiller" container:

• Thriller: Use a tall cane begonia or a Pegasus begonia for its striking foliage.
• Filler: Use wax begonias or upright tuberous varieties to fill the middle space.
• Spiller: Use trailing begonias or companion plants like ivy or sweet potato vine to drape over the edges.

Shady Borders

Wax begonias are perfect for creating a clean, colorful edge along a shaded walkway. Because they grow to a consistent height, they create a neat ribbon of color. We often suggest massing them together for a high-impact look. For bulk planting, Begonia Upright Double Superba Mix is another option for a larger display.

Companion Plants

Begonias play well with other shade-loving plants. Try pairing them with:

• Coleus: For a mix of colorful foliage.
• Caladiums: The large, heart-shaped leaves provide a great backdrop for begonia flowers.
• Ferns: The fine texture of ferns contrasts beautifully with the waxy leaves of begonias.
• Fuchsias: Both plants enjoy similar light and water conditions, making them perfect partners in a hanging basket.

If you are looking for a broad summer-blooming option, Begonia Non Stop Mix - Bulk Offer can be a useful starting point.

Realistic Expectations for Your Garden

Gardening is a journey, and every year brings different weather patterns. It is helpful to remember that begonias are living things that respond to their environment. In a very hot, dry summer, your begonias may need water twice a day and more shade. In a cool, rainy summer, you might need to move pots under cover to prevent them from becoming waterlogged.

If your plant doesn't bloom immediately after you move it outside, don't worry. It often takes a few weeks for the roots to establish in the new soil before the plant has the energy to produce flowers. Patience is part of the reward. Once they start, they will continue to provide color until the cold weather returns.

Conclusion

Growing begonias outside is a simple way to bring professional-level beauty to your home garden. By choosing the right variety for your light levels, waiting for warm weather, and providing consistent water, you can enjoy these tropical treasures all season long. Whether you are planting a single hanging basket on your porch or a long border of wax begonias, the effort is well worth the vibrant results.

At Longfield Gardens, we take pride in providing high-quality tubers and plants that help you succeed. We work with experienced growers to ensure you receive healthy, true-to-variety begonias that are ready to perform in your yard. Learn more about our about our guarantee, and check shipping information before placing your order. Remember, the best way to learn is to get your hands in the soil and observe how your plants grow.

• Wait for warm nights (above 50-60°F) before planting.
• Prioritize well-draining soil to keep roots healthy.
• Provide partial shade to protect delicate foliage from the sun.
• Water at the base of the plant to keep leaves dry.

Your garden is a place of relaxation and joy. Start with a few begonias this season and enjoy the easy, nonstop color they provide to your outdoor living spaces.

FAQ

Do begonias need sun or shade?

Most begonias prefer partial shade or filtered light. While wax begonias with bronze foliage can handle more direct sun, most tuberous and Rex varieties will scorch if they get too much hot afternoon light. A location with morning sun and afternoon shade is usually the best balance for most types.

How often should I water begonias outside?

Watering frequency depends on your weather and whether the plants are in the ground or in pots. As a general rule, water when the top inch or two of soil feels dry to the touch. In the heat of summer, containers and hanging baskets may need water every day, while garden beds may only need it two or three times a week. For a quick refresher, How Much Water Does a Begonia Plant Need? covers the basics.

Will begonias come back every year?

Begonias are tropical plants and are only perennial in very warm climates (USDA zones 9–11). In most of the U.S., they are treated as annuals or the tubers are dug up and stored indoors for the winter. If you live in a cold climate, you must bring them inside or protect them before the first frost if you want to see them again next year.

Why are the leaves on my begonia turning yellow?

Yellow leaves are most often a sign of overwatering or poor drainage. If the soil stays soggy, the roots cannot "breathe," which leads to yellowing foliage and eventually rot. To fix this, allow the soil to dry out more between waterings and ensure your pots have functional drainage holes.