Introduction
There is a unique kind of magic in watching a shady corner of your yard transform into a sea of vibrant color. While many flowering plants crave the intense heat of the afternoon sun, begonias are the true stars of the shade. They offer a lush, tropical feel with very little effort, providing a steady supply of blooms from early summer all the way until the first frost.
At Longfield Gardens, we enjoy helping gardeners find the perfect varieties to turn their porches, patios, and garden beds into relaxing retreats. Whether you are looking for the massive, rose-like blooms of tuberous begonias or the reliable, bushy growth of wax begonias, the planting process is straightforward and rewarding. This guide is designed for home gardeners who want to know exactly how to get these stunning plants off to a great start.
Learning how do you plant begonias is one of the easiest ways to ensure your garden looks professional and polished throughout the season. By following a few simple steps for site preparation and planting depth, you can enjoy a season full of effortless beauty.
Identifying Your Begonia Type
Before you dig your first hole, it helps to know which type of begonia you are working with. Different begonias have slightly different needs, though most share a love for filtered light and well-draining soil. Drainage simply means how fast water leaves the soil; begonias prefer soil that stays moist but never stays soggy.
Tuberous begonias are perhaps the most popular choice for summer containers and hanging baskets, and our guide to where to plant tuberous begonias can help you choose the best spot. These grow from a tuber, which is a thick, fleshy underground stem that stores food for the plant. They are famous for their large, showy flowers that can come in upright or cascading forms. Varieties like the Double Delight series are excellent for adding texture and soft color to your outdoor living spaces.
Wax begonias are the "workhorses" of the garden, and our begonia size guide is a helpful way to compare them with other types. They are typically grown as annuals and feature waxy, succulent leaves and clusters of small red, pink, or white flowers. They are very versatile and work well in mass plantings along borders. Cane begonias, such as the well-known Angel Wing varieties, grow taller and are often kept as houseplants or spectacular focal points in large patio pots.
Key Takeaway: Match the begonia type to your garden goal. Use tuberous varieties for high-impact flowers in pots and wax begonias for consistent color in garden beds.
When to Plant Begonias
Timing is the most important factor when it comes to begonia success. Because begonias are tropical in origin, they have no tolerance for frost. We recommend waiting to move your plants outdoors until the soil has warmed up and nighttime temperatures consistently stay above 60°F.
If you are planting tuberous begonias, you have the option of starting them indoors to get a head start on the season. Starting tubers 8 to 12 weeks before the last expected frost allows the plants to develop strong root systems and foliage before they ever face the elements. This often results in flowers appearing much earlier in the summer.
For those in warmer USDA hardiness zones (zones 9-11), begonias can often be treated as perennials, and our shipping information page explains how timing is based on your zone. However, for most of the United States, they are grown as summer annuals. If you live in a cooler climate, the wait for warm weather is well worth it, as the plants will grow rapidly once the conditions are right.
Choosing the Best Location
Right plant, right place is a rule we live by at Longfield Gardens. Begonias are famous for their shade tolerance, but "shade" can mean many things. Most begonias perform best in filtered light or "dappled shade," such as the light found under a tall tree. They also enjoy morning sun followed by protection from the harsh afternoon rays.
When picking a spot, consider the following:
- Protection from Wind: Tuberous begonias have heavy flowers and brittle stems. A spot protected from strong gusts will prevent the stems from snapping.
- Soil Quality: Begonias need rich, fertile soil. If your garden soil is heavy clay, it may hold too much water. You can improve this by adding compost or peat moss to the area.
- Air Circulation: While begonias like humidity, they also need a bit of air movement to keep their foliage healthy and prevent mildew.
What to Do Next:
- Observe your yard for a full day to find areas with 4–6 hours of morning sun.
- Check your soil after a rainstorm; avoid any spots where puddles remain for more than a few hours.
- Identify a location near a porch or seating area where you can easily enjoy the blooms.
How Do You Plant Begonia Tubers
Planting tuberous begonias is a tactile and satisfying task. If you are starting with dormant tubers, the first step is identifying which side is the top. Look for a side with a slight indentation or "hollow" spot. This is where the sprouts will emerge. The rounded, smoother side is the bottom where the roots will grow.
Step 1: Indoor Starting (Optional)
If you are starting indoors, fill a shallow tray or small pots with a high-quality potting mix. Moisten the mix first so it is damp but not dripping. Place the tubers on the surface with the hollow side facing up. Press them into the soil just enough so the tops are still visible or covered by only a very thin layer of soil.
Step 2: Watering and Warmth
Keep the trays in a warm spot (around 70°F) with bright, indirect light. Water sparingly at first. You want the soil to stay slightly moist, but overwatering at this stage can cause the tuber to rot before it starts growing. Within 2 to 4 weeks, you will see small pink or green sprouts emerging from the hollow center.
Step 3: Moving Outdoors
Once the sprouts are a few inches tall and the outdoor weather is warm, it is time to transplant. If you are planting directly into the garden, dig a shallow hole. Place the tuber inside so that it is covered by no more than one inch of soil. Spacing is important; give your begonias about 8 to 12 inches of room so they can spread out without crowding their neighbors.
Key Takeaway: Always plant begonia tubers with the indented (hollow) side facing up and cover with only one inch of soil.
How to Plant Wax and Cane Begonias
Wax begonias and cane begonias are usually purchased as established plants in nursery "flats" or small pots. Because they already have a root system, the planting process is a bit more traditional than planting tubers.
Start by loosening the soil in your planting bed to a depth of about 6 inches. This makes it easy for the young roots to expand. Remove the plant from its plastic container by gently squeezing the sides and sliding it out. If the roots are circling the bottom of the pot, gently tease them outward with your fingers.
Dig a hole that is twice as wide as the root ball and just as deep. Place the plant in the hole so the top of the root ball is level with the surrounding soil surface. Planting too deep can cause the stems to rot, while planting too shallow can cause the roots to dry out. Fill in the space around the roots with soil, press down lightly to remove air pockets, and water the area thoroughly.
Planting Begonias in Containers
Begonias are perhaps the most versatile plants for containers. Their consistent blooming habit and attractive foliage make them a "thriller" or a "spiller" depending on the variety. Upright tuberous begonias make great focal points, while trailing varieties like the Surefire series look beautiful cascading over the edges of a pot.
When planting in containers, always use a high-quality potting mix rather than garden soil. Potting mix is lighter and designed to provide the drainage begonias need. Ensure your container has at least one drainage hole at the bottom. If you have a beautiful decorative pot without a hole, it is best to use it as a "cachepot"—place the begonia in a slightly smaller plastic pot with holes and set that inside the decorative one.
If you are looking for more ideas for mixed displays, our Perennial Plants for Shade page is a useful place to start. In a container, you can space plants a bit closer than you would in the ground. For a 12-inch pot, three wax begonias or one large tuberous begonia usually provide a full, lush look. After planting, water the container until you see water running out of the bottom holes. This ensures the entire root zone is hydrated.
What to Do Next:
- Select a container with plenty of drainage holes.
- Choose a "thriller" (upright) and a "spiller" (trailing) begonia for a dynamic look.
- Fill the pot with fresh, sterile potting mix to prevent soil-borne diseases.
Soil Preparation and Fertility
Begonias are "heavy feeders," which means they use a lot of nutrients to produce those nonstop flowers. Starting with great soil is the best way to support them. If you are planting in the ground, mixing in a few inches of compost before planting provides a slow-release source of food and improves the soil structure.
For begonias in both pots and the ground, we recommend a regular fertilizing schedule. Use a balanced, water-soluble fertilizer every two weeks throughout the growing season. A "balanced" fertilizer is one where the three numbers on the label (nitrogen, phosphorus, and potassium) are the same, such as 10-10-10.
If you notice your plants have plenty of green leaves but few flowers, you might be using too much nitrogen. In that case, switch to a fertilizer with a higher middle number (phosphorus), which encourages bloom production. Always follow the instructions on the fertilizer package, as using too much can burn the sensitive roots.
Watering Wisely
Watering is where many gardeners feel uncertain, but the rule for begonias is simple: keep the soil damp but not soggy. The best way to check is to stick your finger about an inch into the soil. If it feels dry, it is time to water. If it feels cold and wet, wait another day.
It is best to water begonias at the base of the plant. Try to keep the water off the leaves and flowers. Wet foliage, especially in the shade, can lead to fungal issues like powdery mildew. Watering in the morning is also a great habit; it allows any accidental splashes on the leaves to dry in the sun before the cooler evening temperatures arrive.
If you want a broader overview of begonia light needs, the begonia sun-or-shade guide is a helpful companion read. During the heat of mid-summer, containers may need water every day, as they dry out much faster than the ground. Begonias in the garden are a bit more resilient once their roots are established, but they still appreciate a deep soak during dry spells.
Key Takeaway: Deep, infrequent watering is better than a light sprinkle every day. Always check the soil moisture with your finger before adding more water.
Maintenance for Maximum Blooms
One of the best things about modern begonia varieties, such as those we offer at Longfield Gardens, is that many are "self-cleaning." This means the old flowers fall off on their own, so you do not have to spend hours "deadheading" (removing spent blooms).
However, a little bit of grooming can still go a long way. If you see a yellowing leaf or a broken stem, snip it off with a clean pair of scissors. This keeps the plant looking tidy and prevents diseases from taking hold in the decaying tissue.
If your wax begonias start to look a bit "leggy" or stretched out by mid-August, do not be afraid to give them a light trim. For a closer look at the different forms begonias can take, see What Does a Begonia Plant Look Like? Pinching back the tips of the stems encourages the plant to branch out, resulting in a bushier, fuller appearance and more flower buds.
Moving and Overwintering
As the summer winds down and the first frost approaches, you have a choice to make. Most gardeners treat begonias as annuals and simply add them to the compost pile at the end of the year. However, if you have a favorite tuberous begonia, you can save the tuber for next year.
When the leaves begin to yellow in the fall, stop watering the plant. Once the foliage has died back completely, dig up the tuber and gently shake off the soil. Let the tuber sit in a dry, cool spot for a few days to "cure." Then, store it in a box filled with peat moss or sawdust in a cool, dark place (about 50°F) where it will not freeze.
If you want to compare summer-blooming plants for future gardens, the Spring-Planted Summer-Blooming Bulbs collection is worth a look. In the spring, you can bring the tuber back out and start the process all over again. This is a wonderful way to keep a specific color or variety that you particularly love. Wax begonias are harder to overwinter this way, but they can often be brought inside and kept as houseplants near a bright window for the winter months.
What to Do Next:
- Watch the weather for the first frost warning in your area.
- Decide which tubers are worth saving for the following year.
- Prepare a storage box with dry peat moss for overwintering.
Common Begonia Planting Scenarios
To help you visualize how do you plant begonias in your own yard, consider these common garden scenarios:
The Shady Border: If you have a long, shaded walkway, try mass-planting wax begonias. Space them 6 inches apart in a staggered row. This creates a solid ribbon of color that defines the edge of the path. Use a single color, like white, to make the path glow at dusk.
The Hanging Basket: For a classic front porch look, plant three trailing tuberous begonias in a 12-inch hanging basket. The cascading stems will eventually hide the basket itself, creating a floating ball of flowers. Ensure the basket is hung in a spot that stays out of the midday sun.
The Window Box: Begonias are perfect for window boxes because they stay relatively compact. Combine them with other shade lovers like coleus or ferns. The begonias provide the "pop" of color, while the foliage plants add interesting textures and heights.
Enjoying the Results
Gardening should be a source of joy, and few plants provide as much "bang for your buck" as the begonia. Once you have the basics of planting depth and timing down, these plants are remarkably self-sufficient. They don't demand much, yet they provide a continuous show of color that can make even the dimmest corner of your yard feel bright and welcoming.
The variety of colors and forms available means there is a begonia for every style. From the delicate, citrus-colored petals of some tuberous varieties to the bold, dark foliage of bronze-leafed wax begonias, the options are endless. By taking the time to plant them correctly in the spring, you are setting the stage for a beautiful, stress-free summer in the garden.
Whether you are a seasoned pro or a first-time gardener, the simple act of tucking a tuber into the soil is the start of something beautiful. We hope this guide helps you feel confident and excited about adding these versatile plants to your landscape.
Conclusion
Planting begonias is a simple and effective way to elevate your garden's aesthetic. By choosing the right location, waiting for warm weather, and ensuring your soil has excellent drainage, you create the perfect environment for these tropical beauties to thrive. At Longfield Gardens, we take pride in providing high-quality tubers and plants that help you achieve these results with ease.
- Wait for soil temperatures to reach 60°F before planting outdoors.
- Plant tuberous begonias with the hollow side up, one inch deep.
- Keep soil consistently moist but never waterlogged.
- Fertilize every two weeks for the best flower production.
If you want to learn more about the company behind these tips, our About Us page explains our quality guarantee and customer support. The most rewarding part of gardening is the moment you step outside and see your hard work blooming. We encourage you to try a few new varieties this year and enjoy the stunning, long-lasting color that only begonias can provide.
Growing begonias is one of the most reliable ways to bring life to the shady parts of your garden. With just a little bit of care at the start, they will reward you with a spectacular show all season long.
FAQ
How deep should I plant begonia tubers?
Begonia tubers should be planted quite shallowly. Dig a small hole or indentation and place the tuber inside, then cover it with no more than one inch of soil. If you plant them too deep, the sprouts may struggle to reach the surface, or the tuber may become too wet and rot.
Can begonias grow in full sun?
While most begonias prefer shade or filtered light, some varieties are more sun-tolerant than others. Wax begonias with bronze-colored leaves tend to handle the sun better than those with green leaves. However, in most climates, even sun-tolerant begonias appreciate protection from the intense heat of the mid-afternoon sun.
Which way is "up" when planting a begonia tuber?
Tuberous begonias have a distinct top and bottom. The top side has a slight hollow or bowl-like indentation where the stems will grow. The bottom is usually rounded. If you are unsure, you can plant the tuber on its side, and the plant will naturally send the roots down and the stems up.
Why are my begonia leaves turning yellow?
The most common cause of yellowing leaves in begonias is overwatering. Begonias like moisture, but they cannot sit in waterlogged soil. If the leaves are yellow and the soil feels very wet, allow it to dry out for a few days. Ensure your pots have drainage holes and your garden soil is not holding onto too much water.
