Introduction
Shady corners of the yard often feel like a challenge, but they are actually the perfect stage for some of the most vibrant flowers in the gardening world. Begonias offer an incredible range of colors and textures, from the massive, rose-like blooms of tuberous varieties to the stunning, metallic-patterned leaves of Rex begonias. At Longfield Gardens, we believe that every garden has room for these versatile plants. Whether you have a sprawling backyard or a small apartment balcony, begonias provide nonstop color from the moment they are planted until the first frost of autumn.
We want to help you feel confident as you bring these beautiful plants into your home landscape. Success with begonias does not require a "green thumb" or years of experience. It simply comes down to understanding what these plants need to thrive: the right timing, a bit of protection from the hot sun, and soil that allows their roots to breathe. This guide will walk you through everything you need to know about how to plant begonia plants so you can enjoy a season full of lush growth and spectacular flowers. If you like to buy with confidence, our 100% Quality Guarantee is part of that commitment.
Growing begonias is a rewarding experience that adds a professional touch to your flower beds and containers. By following a few simple steps, you can transform a quiet, shaded area into a bright destination. Our goal is to make the planting process clear and achievable for every gardener.
Choosing the Right Begonia for Your Space
Before you dig your first hole, it is helpful to know which type of begonia best fits your garden goals. Not all begonias are the same, and choosing the right variety ensures your plants will look their best in the spot you have chosen.
Tuberous Begonias
These are the showstoppers of the family. Tuberous begonias grow from a thick, potato-like structure called a tuber. They produce large, dramatic flowers that can be upright or trailing. They are perfect for hanging baskets or window boxes where you can see the blooms at eye level. Varieties like 'Double Delight' or the 'Nonstop' series are famous for their high flower count and ability to bloom all summer long.
Wax Begonias
Wax begonias are the workhorses of the summer garden. They are named for their glossy, waxy leaves, which can be green or a deep bronze. These plants are smaller and more compact, making them ideal for "mass planting," which means planting many of them close together to create a solid carpet of color. They are very reliable and handle a bit more sun than other varieties.
Rex Begonias
If you love interesting textures and patterns, Rex begonias are for person for you. While they do produce small flowers, they are primarily grown for their spectacular foliage. The leaves can feature swirls of silver, purple, pink, and deep burgundy. They stay relatively short and are excellent choices for adding "thrill" to a container or as indoor houseplants.
Cane-Like or Angel Wing Begonias
These begonias have upright, woody stems and beautiful, wing-shaped leaves. They often feature silver spots or splashes. They produce clusters of dangling flowers that look like jewels. These varieties can grow quite tall, sometimes reaching several feet in a single season if given the space.
Key Takeaway: Match the begonia type to your garden's needs. Use tuberous varieties for big blooms, wax begonias for borders, and Rex varieties for stunning leaf patterns.
Selecting the Perfect Planting Site
Begonias are famous for their love of shade, but "shade" can mean many things. Finding the right balance of light and protection is the first step toward a healthy plant.
Light Requirements
Most begonias prefer "partial shade" or "filtered light." This means a spot that gets bright light but is protected from the harsh, direct rays of the afternoon sun. A location that receives 3 to 4 hours of gentle morning sun followed by afternoon shade is often the "sweet spot."
If your begonias get too much sun, their leaves may look scorched or turn brown at the edges. If they get too much shade, they may become "leggy," which means they grow long, thin stems as they stretch toward the light, and they will produce fewer flowers.
Soil and Drainage
The most important rule for begonias is that they hate "wet feet." This means they should never sit in soil that stays soggy or saturated. Begonias need "well-drained soil," which is a term for soil that allows water to move through it quickly.
If you are planting in the ground, you can check your drainage by digging a small hole and filling it with water. If the water is still there an hour later, the soil is too heavy. You can improve this by mixing in organic matter like compost or finely ground bark. This creates tiny air pockets in the soil that help the roots stay healthy.
Protection from the Elements
Because begonias have succulent stems and delicate flowers, they appreciate a bit of protection from strong winds. A sheltered porch, a spot near a fence, or an area under the canopy of a large tree are all excellent choices. This prevents the heavy flower heads from snapping and keeps the foliage looking pristine.
When to Plant Your Begonias
Timing is everything when it comes to how to plant begonia plants. Because begonias are tropical in nature, they have no tolerance for frost.
Watching the Temperature
Wait to move your begonias outdoors until the danger of frost has completely passed. In most regions, this is several weeks after the official "last frost date." A good rule of thumb is to wait until the nighttime temperatures are consistently above 50°F to 60°F. If you want to check your local planting window, our Hardiness Zone Map can help you match timing to your area. If the soil is too cold and wet, the tubers or roots may rot before they have a chance to grow.
Starting Indoors for an Early Show
Many gardeners in cooler climates like to "jump-start" their begonias by planting them indoors about 6 to 8 weeks before the last frost. This gives the plants a head start so they are already blooming when they finally go outside. This is particularly common with tuberous begonias, as they can take a little while to wake up from their winter dormancy.
What to do next:
- Check your local frost dates.
- Monitor nighttime temperatures for a week before planting.
- Prepare your containers or garden beds once the soil feels warm to the touch.
How to Plant Tuberous Begonia Tubers
Tuberous begonias require a specific technique because the tuber itself must be positioned correctly to grow.
Step 1: Identify the Top
Look at the tuber closely. One side will be slightly "concave" or hollowed out, like a shallow bowl. This is the top. The other side will be rounded; this is the bottom where the roots will grow. It is very common for beginners to be confused by this, but just remember: "hollow side up."
Step 2: Preparing the Pot
If you are starting indoors, use a shallow tray or individual small pots with drainage holes. Fill the container with a high-quality potting mix. Moisten the mix slightly so it feels like a wrung-out sponge.
Step 3: Placing the Tuber
Push the tuber into the soil so the top is just at or slightly below the soil surface. You do not need to bury it deep. In fact, leaving the top slightly exposed can help prevent water from settling in the hollow part, which can cause the tuber to rot.
Step 4: Spacing and Depth
If you are planting multiple tubers in a large container or garden bed, space them about 8 to 12 inches apart. This gives each plant enough room to spread out and ensures good airflow between the leaves. If you want a deeper refresher on spacing, see our How Far Apart to Plant Begonias guide. If you are planting directly into the garden, a depth of about 1 inch of soil over the tuber is sufficient once the weather is warm.
Step 5: Initial Watering
Water the soil gently around the tuber to settle it into place. Move the container to a warm, bright spot. Avoid overwatering at this stage. The tuber does not have roots yet, so it cannot drink much water. Only water again when the soil surface feels dry.
How to Plant Wax and Cane Begonias
Wax begonias and Cane-like varieties are usually sold as "transplants" in nursery six-packs or individual pots. Planting these is a straightforward process.
Preparing the Root Ball
When you take the plant out of its plastic pot, look at the roots. If they are circling around the bottom in a tight mass, they are "rootbound." Gently tease the roots outward with your fingers. This "wakes them up" and encourages them to grow into the surrounding soil rather than staying in a tight knot.
Setting the Depth
Dig a hole that is twice as wide as the root ball but no deeper. When you place the begonia in the hole, the top of the root ball should be level with the surface of the garden soil. If you plant them too deep, the stems may rot. If you plant them too high, the roots may dry out.
Backfilling and Tamping
Fill the space around the plant with soil and press down gently with your hands. You do not need to stomp on the soil; a light press is enough to remove large air pockets while keeping the soil fluffy enough for root growth.
Spacing for Impact
Wax begonias look best when planted in groups. Space them about 6 to 8 inches apart. As they grow, they will fill in the gaps to create a solid line of color. Cane-like begonias, which grow taller and wider, should be spaced 12 to 18 inches apart to accommodate their mature size. For another look at placement in the landscape, our Where to Plant Begonias for a Stunning Shade Garden article is a helpful companion.
Planting Begonias in Containers
Begonias are among the best plants for containers. Because you can control the soil and the location, containers often produce the most successful results for home gardeners.
Choosing the Right Pot
Always select a container with drainage holes. If you find a beautiful decorative pot that doesn't have holes, use it as a "cachepot." This means you plant the begonia in a plain plastic nursery pot with holes and then set that pot inside the decorative one. This allows you to remove the inner pot to drain away excess water.
The size of the pot should be slightly larger than the root system of the plant. A pot that is too large can hold too much moisture, which can lead to problems. A 6-inch pot is usually perfect for a single wax begonia, while a 10-inch or 12-inch pot can hold three tuberous begonias for a full, lush look.
Using Potting Mix
Never use "garden soil" or "topsoil" in a container. It is too heavy and will pack down, preventing the drainage begonias need. Instead, use a high-quality "soilless" potting mix. These mixes usually contain peat moss, perlite, or vermiculite, which keep the soil light and airy.
The "Thriller, Filler, Spiller" Method
Begonias fit perfectly into the classic container design rule:
- Thriller: Use a tall Cane-like begonia or a large Rex begonia in the center for height.
- Filler: Use wax begonias or upright tuberous begonias to fill the middle space with color.
- Spiller: Use trailing tuberous begonias or "Waterfall" varieties to drape over the edges of the pot.
For hanging displays, our How to Plant a Begonia Hanging Basket guide walks through the setup step by step.
Key Takeaway: For container success, use light potting mix and ensure your pot has drainage holes. This mimics the begonia's natural tropical environment.
Water and Fertilizer: The Keys to Constant Blooms
Once your begonias are in the ground or their new pots, consistent care will keep them blooming until the end of the season.
The Golden Rule of Watering
Begonias like to be "evenly moist." This means the soil should feel like a sponge that has been squeezed out. To know when to water, stick your finger an inch into the soil. If it feels dry, it is time to water. If it still feels damp, wait another day.
When you water, aim for the base of the plant. Avoid getting water on the leaves, especially late in the day. Wet leaves can encourage "powdery mildew," which looks like a white dusting of flour on the foliage. Watering in the morning is ideal because it allows any accidental splashes to dry in the sun.
Feeding Your Plants
Begonias are "heavy feeders," meaning they use a lot of energy to produce those constant flowers and lush leaves. Starting about a month after planting, begin using a balanced, water-soluble fertilizer. You can find these at any garden center.
Follow the instructions on the label, but a general rule is to fertilize every two to three weeks. If you prefer a lower-maintenance approach, you can mix "slow-release" fertilizer granules into the soil at planting time. These will slowly dissolve and feed the plants for several months.
Simple Maintenance and Grooming
One of the best things about begonias is that they are generally "self-cleaning." This means the old flowers often fall off on their own, so you don't have to spend hours "deadheading" (removing spent blooms). However, a little grooming goes a long way.
Pinching for Fullness
If your begonias are starting to look a bit tall and thin, you can "pinch" them. Use your thumb and forefinger to snip off the very tip of the main stem. This signals the plant to grow more side branches, resulting in a bushier, fuller plant with more flowers.
Removing Yellow Leaves
If you see a yellow or brown leaf, simply snip it off. This keeps the plant looking tidy and prevents any potential issues from spreading. Always use clean scissors or pruners to make sharp cuts.
Supporting Tall Varieties
Cane-like begonias can sometimes become top-heavy as they grow. If your plant starts to lean, you can use a simple bamboo stake and a piece of soft twine to provide support. Tie it loosely so the stem has room to grow thicker over time.
Caring for Begonias at the End of the Season
As autumn approaches and the temperatures drop, you have a few options for your begonias. At Longfield Gardens, we want you to enjoy your plants for as long as possible, and sometimes that means bringing the garden indoors.
Overwintering Tuberous Begonias
If you live in a cold climate, you can save your tuberous begonias for next year. When the leaves start to turn yellow in the fall, stop watering. Once the foliage has died back completely, dig up the tubers.
Shake off the excess soil and let them dry in a cool, shady spot for a few days. Store them in a box filled with dry peat moss or sawdust and keep them in a cool, dark place (like a basement) where they won't freeze. Next spring, you can start the process all over again!
Begonias as Houseplants
Rex begonias and Cane-like begonias make wonderful houseplants. Before the first frost, bring your containers inside and place them in a bright window. They will enjoy the consistent warmth of your home. Keep in mind that indoor air is often drier than outdoor air, so your begonias might appreciate being placed near other plants to help maintain humidity.
Wax Begonias as Annuals
In most parts of the US, wax begonias are treated as "annuals," meaning they complete their life cycle in one year. While you can try to bring them inside, they are often so affordable and easy to find that most gardeners simply compost them at the end of the year and start fresh with new varieties the following spring.
Troubleshooting Common Issues
While begonias are generally easy to grow, you might run into a few simple challenges. Usually, these are easy to fix by adjusting your care routine.
Leggy Growth
If your plant is growing tall and spindly with very few leaves, it is likely asking for more light. Move it to a slightly brighter spot, but avoid putting it in direct, hot afternoon sun. A gentle "pinch" of the stems will also help it fill out.
Dropping Flowers
If your begonia is dropping its flower buds before they open, it is often a sign of stress. This can happen if the soil gets too dry or if there is a sudden, dramatic change in temperature. Check your watering schedule and try to keep the moisture levels consistent.
White Spots on Leaves
If you see white, fuzzy spots, it is likely powdery mildew. This often happens when there is not enough airflow around the plant or if the leaves stay wet at night. To fix this, move the plant to a spot with better air circulation and make sure you only water the soil, not the leaves. If you want a deeper care refresher, our Tips for Growing Tuberous Begonias guide covers the basics in more detail.
What to do next:
- Walk through your garden and check the moisture of your pots.
- Snip off any spent blooms or yellow leaves.
- Adjust the location of any plants that look like they are stretching for light.
Conclusion
Planting begonias is one of the easiest ways to bring high-impact color to the shaded parts of your yard. By choosing the right variety for your space, waiting for warm weather, and ensuring your soil drains well, you are setting yourself up for a beautiful season. We at Longfield Gardens are proud to provide the high-quality tubers and plants that help your garden shine. Whether you are planting a single pot for your porch or an entire border of wax begonias, the process should be a joyful part of your spring routine. For more seasonal choices, browse our Spring-Planted Summer-Blooming Bulbs.
- Choose the variety that fits your light and space.
- Wait for warm nights (above 50°F) before planting outside.
- Use light, well-draining potting mix for containers.
- Water when the top inch of soil feels dry and feed every few weeks.
"Gardening is a journey of discovery. With begonias, that journey is filled with some of the most spectacular colors and patterns nature has to offer. We are here to help you every step of the way."
If you are ready to start your own begonia display, we invite you to explore our selection of premium tubers and plants. With a little bit of planning and these simple steps, your garden will be the talk of the neighborhood. Happy planting!
FAQ
Can begonias grow in full sun?
Most begonias prefer partial shade, but wax begonias with bronze foliage are more sun-tolerant than others. In cooler northern climates, many begonias can handle more sun if they are kept consistently moist. However, in the hot southern US, almost all begonias need protection from the intense afternoon sun to prevent their leaves from burning.
How often should I fertilize my begonia plants?
For the best results, use a water-soluble fertilizer every 2 to 3 weeks during the active growing season (late spring through late summer). This provides the nutrients the plants need to produce constant blooms. If you prefer a "set it and forget it" method, you can use slow-release fertilizer granules at the time of planting, which will feed the plants for several months.
Why are the edges of my begonia leaves turning brown?
Brown, crispy edges on begonia leaves are usually a sign of either too much direct sunlight or inconsistent watering. If the plant is in a very bright spot, try moving it to a more shaded area. Also, check the soil regularly; if it dries out completely, the plant will struggle. Aim for consistently moist, but not soggy, soil.
Do I need to dig up my begonias for the winter?
It depends on the type of begonia and where you live. Tuberous begonias can be dug up and stored in a cool, dry place for the winter if you live in a zone with freezing temperatures. Wax begonias are typically treated as annuals and replaced each year. Rex and Cane-like begonias are often brought indoors to spend the winter as houseplants in a bright window.
