Table of Contents
- Introduction
- Why Proper Spacing Is Important for Begonias
- Spacing for Tuberous Begonias
- Spacing for Wax Begonias
- Planting in Containers vs. the Landscape
- How Far Apart for Foliage Begonias
- Step-by-Step Spacing and Planting Guide
- The Role of Sunlight in Plant Spread
- Managing Growth and Overcrowding
- Caring for Your Newly Spaced Begonias
- Growing Begonias in Different Regions
- Creating Visual Impact with Spacing
- Winter Care and Future Planning
- Conclusion
- FAQ
Introduction
There is something truly special about the way begonias can transform a quiet, shady corner of the yard into a vibrant display of color. Whether you are falling in love with the massive, rose-like blooms of tuberous begonias or the steady, reliable charm of wax begonias, these plants are a joy to grow. At Longfield Gardens, we want to help you make the most of your garden by getting the basics right from the very start with our Begonia Flower Bulbs for Sale collection.
Planning your garden layout is one of the most exciting parts of the season. When you know exactly how to position your plants, you can look forward to a lush, healthy garden that stays beautiful from early summer right through the first frost. For a broader overview, our All About Begonias guide is a great place to start.
The distance between your plants plays a major role in how they look and how well they grow. Getting the spacing right ensures your begonias have the room they need to thrive without competing for light or nutrients.
Why Proper Spacing Is Important for Begonias
When we talk about spacing, we are really talking about giving each plant its own "personal space." Begonias are tropical plants that love humidity, but they also need good air circulation to stay healthy. Air circulation is simply the movement of fresh air around the leaves and stems of the plant.
If plants are packed too tightly, the air can become still and damp around the foliage. This can lead to minor issues like powdery mildew, which looks like a dusting of white flour on the leaves. By giving your plants the right amount of elbow room, you allow the breeze to dry the leaves after a rain or a morning watering. This keeps the plants looking fresh and reduces the need for extra maintenance.
Proper spacing also affects how much food and water each plant receives. If you are drawn to fuller, showier plants, the Upright Double Begonias collection is a good example of the kind that benefits from a little extra room. Every begonia has a root system that reaches out into the soil to find nutrients. When they are spaced correctly, each plant can grow to its full potential. You will see more flowers, larger leaves, and sturdier stems when each plant has its own dedicated patch of soil.
Spacing for Tuberous Begonias
Tuberous begonias are famous for their large, showy flowers that can reach several inches across. Begonia Upright Double Superba White is one example of the tidy, full plants that do well with this kind of spacing. Because these plants grow from a single tuber—which looks a bit like a small, brown potato—they tend to grow in a neat, upright or cascading mound.
For most tuberous begonias in a garden bed, we recommend spacing them 8 to 12 inches apart. This gives the foliage room to branch out and creates a beautiful, continuous look once the plants reach their full size. If you are planting "dinnerplate" varieties, which produce exceptionally large flowers, sticking to the 12-inch mark is best. This ensures the heavy blooms have enough room to be seen and appreciated.
If you have chosen trailing or "pendula" varieties, such as Begonia Hanging Golden Balcony, the spacing remains similar. These plants will naturally spill over the edges of their space, filling in the gaps between plants. A distance of 10 inches is usually the sweet spot for a lush, carpeted effect in a landscape border.
Key Takeaway: For tuberous begonias in the ground, aim for 10 inches of space between the center of each plant to allow for full leaf development and maximum flower production.
Spacing for Wax Begonias
Wax begonias are the "workhorses" of the summer garden. They are often used as bedding plants to create solid blocks of color or tidy borders along a walkway. Because they are generally smaller and more compact than tuberous types, you can plant them a bit closer together.
For a dense "carpet" of color, space wax begonias about 6 to 8 inches apart. This encourages the plants to grow together quickly, which helps shade the soil and keep weeds from popping up. If you prefer to see the individual shape of each plant, or if you are planting a larger variety, you can increase that spacing to 10 or 12 inches.
Wax begonias with bronze-colored leaves are often more vigorous and can handle a bit more sun. These slightly tougher varieties may grow a little wider than the green-leaved types, so giving them an extra inch or two of space is a good idea.
Planting in Containers vs. the Landscape
One of the best things about gardening is that you can adjust your approach based on where you are planting. The rules for spacing change slightly depending on whether your begonias are going into a decorative pot or a large garden bed.
Spacing in Garden Beds and Borders
In the open ground, plants have more room for their roots to wander. However, they also have to compete with more weeds. We usually recommend a wider spacing in the landscape—around 10 to 12 inches for most types. This makes it easier for you to walk between the plants for light weeding or deadheading. It also ensures that if one plant grows faster than its neighbor, they won't become completely tangled.
Spacing in Containers and Hanging Baskets
When planting in containers, you can follow a "tight and full" rule. Since you want the pot to look beautiful immediately, you can space begonias 4 to 6 inches apart. In a standard 12-inch hanging basket, for example, three tuberous begonias like Begonia Hanging Pink Balcony will create a full, overflowing look by mid-summer.
Because container soil is a limited resource, plants in pots need a little extra care. When you space them closely in a container, remember to water them more frequently and provide a bit of liquid fertilizer every few weeks to keep them fueled up.
How Far Apart for Foliage Begonias
While many people grow begonias for their flowers, varieties like Rex begonias are grown for their stunning, colorful leaves. These plants often have a more spreading growth habit.
Because the foliage is the main attraction, you want to make sure the leaves of one plant don't completely bury the leaves of the next one. We suggest spacing foliage-focused begonias about 12 to 15 inches apart. This allows the unique patterns and metallic colors of each leaf to stand out. It also prevents the stems from becoming leggy as they "reach" for light through a crowded canopy.
Step-by-Step Spacing and Planting Guide
Once you have decided on the right distance, it is time to get your hands in the dirt. Following a few simple steps ensures your begonias get off to a great start, and our How to Plant and Care for Begonias guide covers the essentials.
- Check the Weather: Wait until the soil is warm and the danger of frost is gone. Nighttime temperatures should stay consistently above 50°F (and ideally closer to 60°F).
- Prepare the Soil: Loosen the soil to a depth of about 6 inches. Begonias love soil that is "well-drained," which means water leaves the soil quickly rather than sitting in puddles.
- Measure Your Spots: Use a ruler or a garden trowel to mark your 10-inch or 12-inch increments. It helps to "stage" your plants by placing the pots or tubers on top of the soil before you dig any holes.
- Dig the Hole: For a tuber, dig a shallow hole so the top of the tuber sits just about an inch below the surface. For a plant already in a pot, dig a hole as deep as the root ball.
- Mind the Direction: Tuberous begonias have a "hollow" or indented side. This side should face up, as that is where the sprouts will emerge.
- Backfill and Press: Gently fill the soil back in and press down lightly with your hands to remove any large air pockets.
What to do next:
- Choose a spot with partial shade or filtered sunlight.
- Lay out your plants 10 inches apart to visualize the final look.
- Plant tubers with the bowl-shaped side facing the sky.
- Water lightly right after planting to settle the soil.
The Role of Sunlight in Plant Spread
The amount of sun your garden receives can actually change how your begonias grow. This is a great example of the "Right Plant, Right Place" rule we follow at Longfield Gardens. For more on matching light to location, see our Where to Plant Begonias: Sun or Shade? guide.
In very shady areas, begonias tend to grow a bit taller and more "open" as they reach toward the light. If your garden is quite dark, you might want to space your plants an inch or two closer together to make the area look fuller.
In areas with more light (like morning sun and afternoon shade), begonias stay more compact and bushy. These plants will naturally fill their allotted 10 or 12 inches of space with dense foliage. If you live in a very hot climate, remember that begonias appreciate more shade to keep their leaves from scorching. A plant that is comfortable and not stressed by heat will always grow to its expected width more reliably.
Managing Growth and Overcrowding
As the summer progresses, you might notice your begonias growing faster than you expected. This is a sign of a happy plant! If you find that they are starting to overlap significantly, there is no need to worry.
If the plants look a bit too crowded and you are worried about airflow, our How Far Apart to Plant Bedding Begonias article goes into more detail. Simply snip off a few of the lower or inner leaves. This opens up the center of the plant to the breeze.
For wax begonias that are becoming "leggy" (growing long, thin stems with few leaves), you can pinch back the tips of the stems. This encourages the plant to grow outwards instead of just upwards, helping it fill its horizontal space more effectively.
Caring for Your Newly Spaced Begonias
Once your begonias are in the ground and correctly spaced, the rest of the season is all about simple, consistent care.
Watering Correctly
The best way to water begonias is to soak the soil deeply and then wait until the top inch of soil feels dry before watering again. This encourages the roots to grow deep into the ground. Avoid getting too much water on the leaves if possible, as watering the base of the plant is more efficient and keeps the foliage dry. For more practical care tips, our How Do I Care for a Begonia Plant? guide is a helpful companion.
Feeding Your Plants
Begonias are "heavy feeders," meaning they use a lot of energy to produce those constant blooms. Using a balanced, water-soluble fertilizer every two weeks will give them the nutrients they need to fill their space. When the plants have plenty of food, they will grow larger and more vigorously, making your spacing look perfect.
Mulching
Adding a thin layer of mulch (like shredded bark or compost) between your spaced plants can be very helpful. Mulch helps keep the soil moist and prevents rain from splashing soil onto the leaves. It also gives the garden a finished, professional look while the young plants are still growing into their spaces.
Growing Begonias in Different Regions
Because the United States has so many different climates, your begonia experience might vary slightly depending on where you live.
In northern states, the growing season is shorter. To get the most out of your spacing, you might want to start your tubers indoors in pots about 6 to 8 weeks before the last frost. By the time it is warm enough to plant them outside, they will already have several leaves and be ready to fill their spot in the garden. The Hardiness Zone Map can help you confirm your zone.
In southern states, the heat can be more of a factor. Begonias in the South often prefer a bit more room between plants to maximize airflow during humid nights. If you are in a high-humidity area, leaning toward the 12-inch spacing for all varieties is a smart move. Our Shipping Information page explains how shipping timing works by zone.
Creating Visual Impact with Spacing
Gardening is an art as much as it is a science. You can use spacing to create different "moods" in your yard.
- The Formal Look: Space wax begonias exactly 8 inches apart in a straight line or a perfect circle. This creates a tidy, structured appearance that looks great in front of a house.
- The Cottage Look: Mix different colors of tuberous begonias and space them slightly unevenly, between 10 and 14 inches. This feels more natural and relaxed, like a wildflower meadow.
- The "Specimen" Look: If you have a particularly beautiful variety, such as Begonia Upright Double Picotee White, plant just one in a large pot or give it 18 inches of space in the garden. This allows the plant to be the "star of the show" without any distractions.
Winter Care and Future Planning
Begonias are tropical, so they won't survive a cold winter outdoors in most parts of the US. However, tuberous begonias offer a wonderful opportunity for "patience that pays off." In the fall, when the leaves begin to turn yellow, you can dig up the tubers and store them in a cool, dry place for the winter.
When you replant them next spring, you will have a better idea of how they grew the previous year. If they seemed a bit crowded, you can give them an extra two inches of space. If there were gaps in your flower bed, you can move them closer together. This "one change at a time" approach is the best way to become a master of your own unique garden space.
Conclusion
Getting the spacing right for your begonias is one of those simple wins that makes a huge difference in the garden. By giving each plant about 10 to 12 inches of room, you are setting the stage for a summer full of healthy leaves and stunning flowers. Whether you are planting in a cozy patio pot or a long garden border, the goal is always the same: a beautiful, stress-free garden that brings you joy every time you look at it.
At Longfield Gardens, we take pride in providing high-quality tubers and plants that are ready to perform. We work with experienced growers to ensure you receive the very best, and our About Us and Our Guarantee page explains how we stand behind them. Remember, gardening is meant to be a rewarding journey, not a chore.
Final Thought: Success with begonias comes down to warm soil, partial shade, and giving each plant a little room to breathe. With those basics covered, you can sit back and enjoy the show!
Your next step is to head out to your garden with a tape measure or a simple garden stake and mark out your planting spots. Once you see those first green sprouts emerge from the soil, you will know you have given them the perfect start.
FAQ
What happens if I plant begonias too close together?
If begonias are planted too close, they may struggle with poor air circulation, which can lead to leaf spots or powdery mildew. They might also compete for water and nutrients, resulting in smaller flowers and thinner stems. Spacing them correctly ensures each plant stays healthy and looks its best.
How many tuberous begonias can I fit in a 12-inch hanging basket?
For a standard 12-inch hanging basket, we recommend planting three tubers from the Hanging Begonias collection. This provides a lush, full look quite quickly without overtaxing the soil. Because they are in a confined space, be sure to water them regularly and provide liquid fertilizer every two weeks during the growing season.
Should I space begonias differently in the sun vs. the shade?
Yes, begonias in deeper shade often grow a bit taller and less bushy, so you might space them an inch or two closer (about 8–10 inches) to ensure the area looks full. In areas with more morning sun, the plants stay more compact and spread out horizontally, so the standard 12-inch spacing works perfectly.
Do trailing begonias need more space than upright ones?
Trailing begonias don't necessarily need more space at the root level, but they do need room for their stems to spill over. In the ground, 10–12 inches is still ideal. In a container, Begonia Hanging Pink Balcony is a good example of a trailing variety that can be placed near the edge of the pot so the stems have plenty of room to cascade downward without bumping into other plants.