How Do I Grow Begonias for Beautiful Summer Color

Table of Contents

1. Introduction
2. Getting to Know the Different Types of Begonias
3. Picking the Perfect Location
4. How to Plant Begonia Tubers
5. Essential Care for Growing Begonias
6. Growing Begonias in Containers and Hanging Baskets
7. How to Overwinter Your Begonias
8. Simple Ways to Propagate Begonias
9. Conclusion
10. FAQ

Introduction

Begonias are a favorite for many home gardeners because they bring incredible color and lush foliage to those tricky, shaded spots in the yard. Whether you are looking for large, rose-like blooms to fill a hanging basket or striking, patterned leaves for a centerpiece on your patio, there is a begonia that fits the bill. At Longfield Gardens, we enjoy how these plants transform a quiet corner into a vibrant display with very little effort.

This guide is designed for any gardener who wants to learn the simple steps for success with begonias. We will walk through the different types you might encounter, the best ways to plant them, and how to keep them blooming all summer long. From choosing the right location to storing your plants for next year, we have you covered.

Growing begonias is a rewarding and achievable way to add professional-looking beauty to your home landscape. By focusing on a few basic needs like drainage and light, you can enjoy a season full of spectacular flowers and foliage.

Getting to Know the Different Types of Begonias

Before you get started, it is helpful to know which kind of begonia you are growing. While there are thousands of varieties, most home gardeners choose from four main groups. Each has its own personality and growth habit.

Tuberous Begonias

These are the showstoppers of the shade garden. They grow from a thick, brown, potato-like structure called a tuber. Tuberous begonias are famous for their large, multi-petaled flowers that look like roses or camellias. You can find them in upright versions for garden beds and trailing versions that spill beautifully over the sides of hanging baskets. Popular series like "Non-Stop" are known for blooming continuously from early summer until the first frost.

Wax Begonias (Fibrous Begonias)

If you have ever seen a public park with neat rows of small, mounding flowers in red, white, or pink, you were likely looking at wax begonias. These are easy-to-grow annuals with succulent stems and waxy, heart-shaped leaves. They are very reliable and can handle a bit more sun than their tuberous cousins.

Cane Begonias (Angel Wing)

These begonias have upright, woody stems that look a bit like bamboo. Their most striking feature is the foliage—long, pointed leaves that often have silver spots or "freckles." They produce clusters of drooping flowers and are just as happy as houseplants as they are on a covered porch.

Rex Begonias (Rhizomatous)

With Rex begonias, the leaves are the main event. The foliage comes in incredible swirls of silver, purple, pink, and deep green. While they do produce small flowers, most gardeners grow them for their artistic, painted-looking leaves. They prefer high humidity and filtered light, making them excellent choices for containers and indoor life.

What to do next:

• Identify whether you want large blooms (Tuberous) or colorful leaves (Rex).
• Decide if your plant will live in the ground, a pot, or a hanging basket.
• Choose colors that complement your existing garden palette.

Picking the Perfect Location

Matching your begonia to the right spot is the first step toward a healthy plant. Most begonias evolved as forest understory plants, meaning they are used to dappled light and moist, rich soil.

Light Requirements

The general rule for begonias is "bright, indirect light." Direct afternoon sun can be too intense and may scorch the delicate leaves or cause the flowers to wilt. A spot that gets gentle morning sun and afternoon shade is often perfect. If you have a fully shaded porch, begonias will still grow, though they may produce fewer flowers than they would with a little bit of filtered light.

Soil and Drainage

Begonias have very fine, sensitive roots that do not like to sit in water. Drainage—which is how fast water leaves the soil—is the most important factor for plant health. If you are planting in the ground, the soil should be loose and rich in organic matter. If you notice water puddling in a spot hours after it rains, that area is likely too wet for begonias.

For containers, always use a high-quality potting mix rather than garden soil. Potting mix is designed to be light and airy, which allows the roots to breathe and prevents rot.

Airflow and Space

While begonias love humidity, they also need good air circulation. If plants are crowded too closely together, moisture can sit on the leaves and lead to issues like powdery mildew. Space your plants about 10 to 12 inches apart to give them room to grow and breathe.

How to Plant Begonia Tubers

If you are growing tuberous begonias, you will likely start with dormant tubers in the spring. These look like small, brown discs. Following a few simple rules for planting depth and orientation will give your plants a strong start.

Starting Indoors for Earlier Blooms

Since begonias are tropical and take about 8 to 12 weeks to reach full bloom, many gardeners start them indoors. This is usually done about two months before the last expected frost in your area. Starting them in a warm, indoor spot gives you a "head start" so you can enjoy flowers as soon as the weather warms up.

1. Find the "Up" Side: Look at your begonia tuber. One side is usually slightly indented or hollowed out like a bowl. This is the top. The rounded, smooth side is the bottom. If you see tiny pink or green nubs, those are the sprouts—make sure they face up!
2. Prepare the Container: Fill a shallow tray or small pots with moist potting mix.
3. Set the Tuber: Place the tuber on top of the soil with the hollow side facing up. Do not bury it deep. You only need to cover it with about half an inch of soil. Some gardeners even leave the very top of the tuber exposed until sprouts appear.
4. Water Sparingly: Water the soil once to settle it, then wait. The tuber is prone to rot if the soil stays too wet before roots have formed. Only water again if the soil feels dry to the touch.

Moving Begonias Outdoors

Once the threat of frost has passed and nighttime temperatures are consistently above 60°F, your begonias are ready for the garden. Moving them too early can stunt their growth, as they truly love warmth.

If you are planting directly into the ground, dig a small hole, place the tuber (or the sprouted plant) about an inch below the soil surface, and space them 10 to 12 inches apart. If you are using hanging baskets, three tubers in a 12-inch basket will create a full, lush look.

Key Takeaway: Always plant begonia tubers with the hollow, bowl-like side facing up. Covering them with just a thin layer of soil (about 1/2 inch) is the secret to quick sprouting.

Essential Care for Growing Begonias

Once your begonias are established, they are relatively low-maintenance. Getting the watering and feeding right will keep them looking lush throughout the summer heat.

Watering Correctly

The goal with begonias is to keep the soil "evenly moist." Think of a wrung-out sponge—damp, but not dripping.

• Check the soil: Stick your finger an inch into the soil. If it feels dry, it is time to water.
• Water the base: Avoid splashing water on the leaves or flowers. Moisture sitting on the foliage can encourage fungal issues.
• Adjust for weather: In the peak of summer or on windy days, containers and hanging baskets may need water every day. If the weather is cool and cloudy, you can wait longer between waterings.

Fertilizer and Growth

Begonias are "heavy feeders," meaning they use a lot of energy to produce those big blooms and leaves. To support this, use a balanced, water-soluble fertilizer every two weeks during the growing season. Following the instructions on the label will ensure you are giving them the right amount without overdoing it.

Deadheading and Grooming

To keep your plants looking tidy and to encourage more flowers, practice "deadheading." This simply means removing flowers as they begin to fade. If a stem gets too long and "leggy," you can pinch back the tip. This tells the plant to grow bushier and produce more side branches, leading to more blooms.

Safety Note

It is important to remember that all parts of the begonia plant can be toxic to pets if ingested. The most toxic part is the underground tuber or root system. If you have curious cats or dogs, it is a good idea to keep your begonias in hanging baskets or raised containers out of their reach.

Growing Begonias in Containers and Hanging Baskets

Begonias are practically designed for container life. Their shallow root systems and spectacular colors make them the perfect "thriller" or "spiller" for your pots.

Choosing the Right Pot

When picking a container, the most important feature is a drainage hole. Without a way for excess water to escape, the soil will stay too wet and the tubers may rot. Terra cotta pots are great because they are porous and allow air to reach the roots, but plastic or glazed ceramic pots also work well if you monitor your watering carefully.

Potting Mix Secrets

Never use "topsoil" or "garden soil" in a container. It is too heavy and will pack down, crushing the roots and holding too much water. We recommend a peat-based potting mix that includes perlite or vermiculite. These white, popcorn-like bits in the soil help keep it light and airy.

Designing Your Display

• Upright Begonias: These work best in the center of a pot. Surround them with smaller shade plants like lobelia or creeping jenny.
• Trailing Begonias: These are the stars of hanging baskets. Their stems naturally arch and cascade downward.
• Foliage Focus: Mix Rex begonias with ferns or hostas in a large planter for a texture-rich, sophisticated look.

What to do next:

• Choose a pot with a drainage hole that is 2 inches wider than your plant's root ball.
• Use fresh, light potting mix.
• Place your containers in a spot protected from heavy winds.

How to Overwinter Your Begonias

In most of the United States, begonias are treated as annuals because they cannot survive freezing temperatures. However, you can save your tuberous begonias to plant again next year! This is a great way to enjoy your favorite varieties for multiple seasons.

The Curing Process

When the leaves start to turn yellow in the fall or after the first light frost, it is time to bring them in.

1. Lift the tubers: Carefully dig the tubers out of the ground or remove them from their pots.
2. Trim the stems: Cut the stems back to about an inch above the tuber.
3. Dry them out: Place the tubers in a cool, dry, shaded spot for a few days. This "curing" helps the outer skin toughen up for storage.

Winter Storage

Once dry, shake off the excess soil. Place the tubers in a paper bag or a box filled with dry peat moss, sawdust, or shredded paper. Store them in a cool, dark, and dry place where temperatures stay between 40°F and 50°F. A basement or a cool closet is usually ideal. Check on them once or twice during the winter to make sure they aren't shriveling up or getting soft. In the spring, you can start the whole process over again.

Simple Ways to Propagate Begonias

If you have a begonia you truly love, you can easily create more plants through cuttings. This is a fun and cost-effective way to expand your garden.

Stem Cuttings

This method works well for Cane and Wax begonias.

• Cut a 4-inch piece of a healthy stem, making sure it has at least two "nodes" (the bumps where leaves grow).
• Remove the lower leaves and place the stem in a glass of water or a small pot of moist potting mix.
• If using water, change it once a week. You should see roots starting to form in about 3 to 4 weeks.
• Once the roots are an inch long, you can move the new plant into its own pot.

Leaf Cuttings

Rex begonias can be propagated using just a single leaf! By cutting a healthy leaf into sections and placing them on top of moist soil, you can grow several new "baby" begonias from one parent leaf. This requires a bit of patience and high humidity, but it is a fascinating project for any gardener.

Conclusion

Growing begonias is a wonderful way to bring color and life to the shaded parts of your yard. Whether you are starting with tubers in the spring or picking up a few wax begonias for your garden beds, these plants offer a high reward for very little work. By remembering the simple rules of "right plant, right place"—focusing on indirect light and excellent drainage—you can enjoy a lush, tropical look all summer long.

At Longfield Gardens, we want every gardener to feel confident in their ability to create a beautiful space. Begonias are the perfect partner in that journey, providing reliable performance and stunning variety year after year.

• Start early: Plant tubers indoors 8 weeks before the last frost.
• Check the drainage: Ensure pots have holes and soil is light and airy.
• Water at the base: Keep the soil moist but the leaves dry.
• Feed your plants: Use a balanced fertilizer every two weeks for the best blooms.

For the best results, match the begonia variety to your specific space. Choose trailing types for baskets and upright types for garden beds to create a balanced and beautiful landscape.

Ready to start your own shade garden masterpiece? You can explore our collection of premium begonia tubers at Longfield Gardens to find the perfect colors for your home.

FAQ

Which side of the begonia tuber should face up when planting?

The top of a begonia tuber is the side with a slight indentation or "hollow" shape, similar to a shallow bowl. You should always plant this side facing up, as this is where the new sprouts will emerge. The smooth, rounded side should face down into the soil.

When will my begonias start blooming?

Begonias typically take about 12 to 15 weeks from the time they are planted to reach full bloom. If you start your tubers indoors in March or April, you can expect to see flowers by early summer. They will continue to bloom consistently until the first frost in autumn.

Can begonias grow in full sun?

Most begonias, especially tuberous and Rex varieties, prefer partial shade or filtered light and can scorch in direct afternoon sun. However, wax begonias (fibrous begonias) are much more sun-tolerant and can often handle full sun if they are given plenty of water and the weather isn't extremely hot.

Why are the leaves on my begonia turning yellow or mushy?

Yellow, mushy leaves are usually a sign of overwatering or poor drainage. Begonias are very susceptible to root and tuber rot if the soil stays saturated. To fix this, allow the top inch of soil to dry out before watering again and ensure your container has adequate drainage holes.