Top Tips for Growing Begonias for a Season of Color

Table of Contents

1. Introduction
2. Understanding the Different Types of Begonias
3. Timing Your Planting for Success
4. Preparing the Best Growing Environment
5. How to Plant Begonia Tubers
6. Watering Correctly, Not Constantly
7. Feeding Your Plants for Maximum Blooms
8. Maintenance and Grooming Tips
9. Growing Begonias in Containers and Hanging Baskets
10. Overwintering: Saving Your Tubers for Next Year
11. Simple Solutions for Common Issues
12. Choosing Varieties for Specific Looks
13. Conclusion
14. FAQ

Introduction

There is something truly magical about the way begonias can transform a quiet, shaded corner into a vibrant display of color. Whether you are looking for the massive, rose-like blooms of tuberous begonias or the intricate, swirling patterns of foliage types, these plants are remarkably rewarding to grow. They offer a lush, tropical feel that few other plants can match, especially in areas where other flowers might struggle to find enough sunlight. For a broader look at the family, start with our All About Begonias guide.

At Longfield Gardens, we believe that everyone can enjoy these beautiful blooms with just a few simple steps. Begonias are versatile enough for garden beds, window boxes, and hanging baskets, making them a perfect choice for gardeners of all experience levels. This guide is for anyone who wants to bring more color to their landscape and needs practical advice to get the best results. If you are ready to shop, browse our Begonia Flower Bulbs for Sale collection.

Our goal is to help you understand the specific needs of these plants so you can enjoy a full season of spectacular flowers and foliage. By matching the right variety to your space and getting the timing right, you can create a stunning garden retreat. Growing begonias is an achievable way to add elegance and charm to your outdoor living spaces, and our Shipping Information page can help you plan by zone.

Understanding the Different Types of Begonias

Before you get started, it is helpful to know that not all begonias are the same. Each type has its own personality and growth habit. Choosing the right one for your specific garden goal is the first step toward success.

Tuberous Begonias

These are the showstoppers often found in our catalog. They grow from a thick, potato-like tuber and produce large, dramatic flowers that can reach several inches across. You will find upright varieties that stand tall in garden beds and cascading types that spill beautifully over the sides of hanging baskets. Tuberous begonias are famous for their rose-form, ruffled, or picotee-edged petals, and the Non-Stop Begonias collection is a great example of the look.

Wax Begonias (Fibrous)

Often called "bedding begonias," these are the hardy workhorses of the garden. They have smaller, succulent-like leaves and clusters of petite flowers in red, white, or pink. They are typically grown as annuals and are excellent for mass plantings or borders. Unlike some of their cousins, wax begonias are often more tolerant of sunny spots.

Rex Begonias

If you love striking patterns and colors, Rex begonias are for you. While they do bloom, they are grown primarily for their foliage. The leaves can feature metallic silvers, deep purples, and vivid pinks in swirls and stripes. These are popular as both shade garden accents and long-lasting houseplants. For design ideas, see What Flowers to Plant with Begonias for a Stunning Garden.

Cane Begonias

Commonly known as "Angel Wing" begonias, these plants have tall, bamboo-like stems and attractive, wing-shaped leaves. They often have silver spots on the foliage and produce clusters of drooping flowers. These can grow quite large and make excellent focal points in large containers. If you want to compare light needs, read Where to Plant Begonias: Sun or Shade?.

Key Takeaway: Match the begonia type to your garden's needs. Choose tuberous for big blooms, wax for borders, and Rex for stunning foliage.

Timing Your Planting for Success

Begonias are tropical plants by nature, which means they love warmth and cannot handle a frost. Getting the timing right is more important than almost any other tip.

In most parts of the United States, we recommend waiting until the soil has warmed up and the danger of frost has completely passed before moving plants outdoors. A good rule of thumb is to wait until nighttime temperatures are consistently above 50°F or 60°F. If you plant them too early in cold, damp soil, the tubers may sit dormant or struggle to start growing. The Shipping Information page is a helpful place to check zone timing.

For those in cooler climates (Zones 3 through 8), you can get a head start by pre-sprouting your tubers indoors. Starting them 8 to 12 weeks before the last expected frost gives the plants plenty of time to develop a strong root system. By the time the weather is warm enough to move them outside, you will already have established plants ready to bloom.

Preparing the Best Growing Environment

Begonias are not overly demanding, but they do have a few specific preferences for their "home." If you give them the right light and soil from the start, they will require much less maintenance later in the season.

Light Requirements: The Shade Myth

While begonias are famous for being shade plants, most varieties actually prefer "filtered" or "dappled" light rather than deep, dark shade. Think of the light under a tall tree or on a porch that gets soft morning sun but is protected from the harsh afternoon heat.

• Tuberous varieties: These love bright, indirect light. Too much direct afternoon sun can scorch the leaves, while too much shade can result in fewer flowers and "leggy" stems.
• Wax begonias: These are more sun-tolerant, especially if the soil stays moist. Varieties with bronze-colored leaves generally handle more sun than those with green leaves.

Soil and Drainage

The word "drainage" simply refers to how fast water leaves the soil. Begonias have fleshy stems and roots that store water, which makes them very sensitive to "wet feet." If they sit in waterlogged soil, the roots or tubers can rot.

Use a high-quality potting mix that feels light and fluffy. If you are planting in the ground, we suggest adding some compost or peat moss to loosen the soil. This helps ensure that excess water can move away from the plant while still keeping the roots cool and moist. For more on site selection, see Where to Plant Begonias: Sun or Shade?.

What to do next:

• Check your local frost dates to plan your planting.
• Choose a spot with dappled light, away from the hot afternoon sun.
• Ensure your pots have plenty of holes at the bottom for drainage.

How to Plant Begonia Tubers

If you are starting with tubers from Longfield Gardens, you might notice they have a unique shape. They look a bit like a small, brown bowl.

1. Identify the top: The indented or "cupped" side is the top. This is where the sprouts will eventually emerge. The rounded side is the bottom where the roots will grow.
2. Planting depth: You do not need to bury them deep. In fact, planting them too deep is a common reason they might fail to sprout. Simply tuck the tuber into the soil so it is just barely covered—about 1/2 inch to 1 inch of soil on top is plenty. For a full step-by-step, see How Deep Should I Plant Begonias?.
3. Spacing: Give them room to breathe. Upright tuberous begonias should be spaced about 10 to 12 inches apart. This allows for good air circulation, which helps prevent diseases like powdery mildew (a white, dusty-looking fungus on the leaves). For more spacing guidance, read How Far to Plant Begonias Apart?.
4. Initial watering: Give them a gentle drink after planting to settle the soil, but then wait until you see green growth before watering heavily again.

Watering Correctly, Not Constantly

One of the most important tips for growing begonias is learning the balance of watering. Because they are succulent-like, they hold water in their stems. They want to stay moist, but never soggy.

The "finger test" is your best tool. Stick your finger about an inch into the soil. If it feels dry, it is time to water. If it still feels damp, wait another day.

When you do water, try to aim for the base of the plant. Getting water trapped in the leaves or the center of the plant can lead to rot or fungal issues. For a container-focused approach, see Can Begonias Be Planted in Pots?. For plants in containers and hanging baskets, check them more frequently, as these dry out much faster than garden beds—especially during the heat of July and August.

Feeding Your Plants for Maximum Blooms

Begonias are "heavy feeders," meaning they need a regular supply of nutrients to keep producing those large flowers all summer long.

When the plants are about 3 to 4 inches tall and have several sets of leaves, you can begin a regular feeding schedule. We recommend using a balanced, water-soluble fertilizer. Look for a "bloom booster" formula with a higher middle number (phosphorus), which encourages flower production rather than just green leaves.

Feeding your begonias every two weeks throughout the growing season will ensure they have the energy to bloom right up until the first frost of autumn. Always follow the instructions on the fertilizer label, and never apply fertilizer to bone-dry soil, as this can stress the roots.

Maintenance and Grooming Tips

A little bit of "beauty shop" work goes a long way with begonias. Taking a few minutes each week to groom your plants will keep them looking fresh and healthy.

Deadheading

"Deadheading" is simply the act of removing spent or faded flowers. When a begonia flower begins to wilt, gently pinch it off at the stem. This prevents the plant from putting energy into producing seeds and instead directs that energy into creating new flower buds. It also keeps the plant looking tidy and prevents old petals from rotting on the leaves.

Supporting Tall Stems

Upright tuberous begonias can sometimes produce flowers so large and heavy that the stems might lean or snap. This is especially true after a heavy rain. You can use a small bamboo stake and a loose tie to give the main stem some extra support. Just be careful not to poke the stake through the tuber underground.

Pinching for Fullness

If your begonias are looking a bit tall and thin (leggy), you can "pinch" back the tips of the stems. This encourages the plant to branch out, resulting in a bushier, fuller appearance with more places for flowers to grow.

Key Takeaway: Regular grooming, deadheading, and bi-weekly feeding are the "secret" to professional-looking begonias that bloom all summer.

Growing Begonias in Containers and Hanging Baskets

Begonias are perhaps the ultimate container plants. Their ability to thrive in pots makes them perfect for renters, urban gardeners, or anyone who wants to decorate a porch or patio.

Choosing the Right Container

Always prioritize drainage over aesthetics. If you find a beautiful ceramic pot that doesn't have a hole in the bottom, use it as a "sleeve" for a plain plastic nursery pot that does have drainage.

For hanging baskets, cascading varieties like the "Illumination" or "Cascading" series are ideal. These are bred specifically to trail downward, creating a waterfall of color. If you want a ready-made option for a shady display, the Assorted Bold Container for Shade Collection is another useful choice. Because hanging baskets are exposed to wind on all sides, they dry out very quickly. You may need to water them every day during the peak of summer.

Container Soil

Never use garden soil in a container. It is too heavy and can pack down, suffocating the roots. Always use a high-quality, peat-based potting mix. This provides the light, airy environment that begonia roots love.

Overwintering: Saving Your Tubers for Next Year

One of the best things about tuberous begonias is that you can keep them for years. In most of the United States, they are treated as annuals, but the tubers themselves are perennials that just need a nap in a frost-free place.

The Dormancy Process

As the days get shorter and the temperatures drop in the fall, your begonias will naturally start to slow down. The leaves may begin to turn yellow. This is the plant's way of telling you it is ready for its winter rest.

1. Lift the tubers: Before the first hard frost, carefully dig up the tubers or bring the pots into a garage or shed.
2. Dry them out: Let the plants sit in a dry, protected spot until the foliage turns completely brown and brittle. At this point, the stems should pull away from the tuber very easily.
3. Clean and store: Shake off any excess soil. Place the tubers in a paper bag or a box filled with dry peat moss or sawdust.
4. The ideal spot: Store them in a cool, dark, and dry place (like a basement or crawlspace) where temperatures stay between 40°F and 50°F.

In the spring, you can pull them out, start the pre-sprouting process again, and enjoy the same plants year after year. For more on long-term performance, see Are Begonias a Perennial Plant?.

Simple Solutions for Common Issues

While begonias are generally easy-going, you might run into a few common hurdles. Most can be fixed by simply adjusting the environment.

Powdery Mildew

If you see a white, flour-like substance on the leaves, it is likely powdery mildew. This often happens when the air is humid and there isn't enough breeze around the plants. To prevent this, make sure your plants aren't crowded too closely together. If you see affected leaves, remove them promptly and ensure you aren't watering the foliage directly.

Dropping Buds

It can be disappointing to see flower buds fall off before they open. This usually happens if the plant is stressed. The most common causes are the soil being either too dry or too wet. Extreme heat can also cause bud drop. If a heatwave hits, move your containers to a cooler, more shaded spot until the temperature drops.

Leggy Growth

If your begonia is growing very tall with long spaces between the leaves and very few flowers, it is likely asking for more light. Try moving it to a spot that receives more bright, indirect light or a little bit of soft morning sun.

What to do next:

• If your plant looks unhappy, check the soil moisture first.
• Improve air circulation to keep leaves healthy.
• Remove any yellowing or diseased leaves as soon as you see them.

Choosing Varieties for Specific Looks

When you browse our selection at Longfield Gardens, you will see a wide variety of colors and shapes. Here are a few ways to use them in your design:

• For a Romantic Look: Choose "Roseform" begonias in soft pinks, whites, and corals. Their multi-petaled blooms look exactly like roses but thrive where roses won't grow.
• For High Contrast: Look for "Picotee" varieties. These have petals in one color (like yellow or white) with a thin, vibrant edge of another color (like red or pink).
• For Scent: While many begonias aren't fragrant, the "Scentiment" series offers a lovely, light perfume that is rare for these plants.
• For Small Spaces: "Non-Stop" begonias are compact and produce flowers continuously, making them perfect for smaller pots or front-of-the-border displays.

Conclusion

Growing begonias is one of the simplest ways to bring professional-level beauty to your home garden. By focusing on the basics—choosing the right variety, providing dappled light, and ensuring well-drained soil—you can enjoy an incredible display that lasts from midsummer all the way to the first frost. These plants are a testament to the fact that you don't need a full-sun garden to have a spectacular floral show.

At Longfield Gardens, we take pride in providing high-quality tubers that are ready to perform in your yard. Whether you are planting a single hanging basket or a sprawling shade border, we are here to support your journey. Remember that gardening is meant to be a relaxing and rewarding process. Don't be afraid to experiment with different colors and textures to find what brings you the most joy.

• Start your tubers indoors for an earlier summer show.
• Keep the soil moist but never soggy to protect the roots.
• Fertilize regularly to keep the flowers coming all season long.

Success with begonias is all about providing a warm, protected environment and a little bit of consistent care. Once you see that first massive bloom open, you’ll understand why these plants are a favorite for generations of gardeners.

FAQ

Can begonias grow in full sun?

Most begonias, especially tuberous and Rex types, prefer shade or filtered light and will scorch in direct afternoon sun. However, certain wax begonias and some modern hybrids like Dragonwing or Big begonias can tolerate more sun if they are given plenty of water and have time to acclimate.

Why are my begonia leaves turning yellow?

Yellow leaves are usually a sign of overwatering or poor drainage. If the soil stays too wet, the roots cannot breathe, leading to yellowing foliage and eventually rot. Check the soil moisture and ensure your container has adequate drainage holes.

How often should I fertilize my begonias?

For the best flower production, we recommend fertilizing your begonias every two weeks during the growing season. Use a balanced, water-soluble fertilizer or a bloom-booster formula once the plant has established its first few sets of leaves.

Are begonias toxic to pets?

Yes, begonias are known to be toxic to cats and dogs if ingested, with the most toxic part of the plant being the underground tuber or rhizome. It is always a good idea to keep these plants out of reach of curious pets and to consult a veterinarian if you suspect your pet has eaten any part of the plant.