Table of Contents
- Introduction
- Choosing the Right Begonias for Your Garden
- Finding the Best Location: Right Plant, Right Place
- When to Start Your Begonias
- How to Plant Begonias Step-by-Step
- Water Correctly, Not Constantly
- Fertilizing for Maximum Blooms
- Designing Your Outdoor Space with Begonias
- Maintaining Your Begonias Through the Season
- What to Do When the Season Ends
- Creating a Stress-Free Garden
- Conclusion
- FAQ
Introduction
Finding the perfect flower for a shaded corner of the yard is a moment of pure gardening joy. While many blooming plants demand hours of intense, direct sunlight, begonias thrive in the softer light of porches, patios, and tree-lined borders. These versatile plants are a favorite at Longfield Gardens because they offer a nearly endless supply of color from early summer right through the first frost of autumn. Whether you are looking for upright blooms for a window box or cascading flowers for a hanging basket, there is a begonia that fits your vision. (longfield-gardens.com)
This guide is designed for home gardeners who want to bring these tropical beauties into their own outdoor spaces. We will cover how to select the right varieties for your specific garden conditions, the best time to get them in the ground, and the simple care steps that keep them looking their best. From understanding soil needs to mastering the art of watering, you will find everything you need to grow begonias with confidence. By following a few basic principles, you can enjoy a season full of vibrant, high-impact flowers that brighten even the dimmest spots in your landscape. (longfield-gardens.com)
Growing begonias outdoors is an accessible and rewarding way to enhance your home’s curb appeal with minimal stress.
Choosing the Right Begonias for Your Garden
Before you pick up a trowel, it helps to understand the different types of begonias available. While they all share a love for warm weather, their growth habits and flower styles vary significantly. Matching the right type of begonia to your garden's layout is the first step toward a beautiful display.
Tuberous Begonias
Tuberous begonias are the "showstoppers" of the family. They grow from a thickened underground stem called a tuber and produce large, intricate flowers that often resemble roses, camellias, or carnations. These are the primary focus for many home gardeners because of their spectacular color range, including vivid reds, soft pastels, and bi-colors.
At Longfield Gardens, we specialize in premium tuberous begonias because they offer so much versatility. You can find upright varieties like Begonia Upright Double Roseform Pink that stay tidy in garden beds, or Begonia Hanging Pink Balcony types that gracefully spill over the edges of containers. They are an excellent choice for anyone who wants a "high-end" look with very little technical difficulty. (longfield-gardens.com)
Wax Begonias
Wax begonias (Begonia semperflorens) are popular bedding plants. You often see them in public parks or lining front walkways because they are incredibly reliable. They have waxy, succulent-like leaves that are either bright green or a deep bronze. While their flowers are smaller than tuberous types, they produce them in such high volume that the plants eventually look like a solid carpet of color. Wax begonias are also unique because they are more tolerant of sunlight than most other varieties. (longfield-gardens.com)
Rex and Rhizomatous Begonias
While many people grow begonias for their flowers, Rex begonias are grown for their foliage. Their leaves are works of art, featuring swirls of silver, purple, pink, and burgundy. These are often used as "thriller" or "filler" plants in mixed containers to provide texture and interest even when other plants aren't in bloom. Rhizomatous begonias are similar, growing from creeping stems near the soil surface, and are prized for their unique leaf shapes and fuzzy textures.
Key Takeaway: Choose tuberous begonias for large, rose-like flowers in containers, or wax begonias for low-maintenance color in garden borders.
Finding the Best Location: Right Plant, Right Place
The key to healthy begonias is mimicking their native tropical environment. They love warmth and humidity, but they are sensitive to the harsh intensity of the midday sun. For more help choosing the right exposure, see our Where to Plant Begonias: Sun or Shade? guide. (longfield-gardens.com)
Understanding Light Requirements
Most begonias prefer "dappled" or "filtered" sunlight. This is the kind of light you find under a tall tree where the sun peeks through the leaves. If you are planting in a spot that gets direct sun, aim for morning light. The morning sun is cooler and less likely to scorch the leaves.
If your garden is very shady, begonias are one of the few plants that will still bloom for you. However, keep in mind that they do need some light to produce flowers. In very deep shade, the plants may grow tall and "leggy" as they reach for the sun, and the flower production might slow down. A spot that gets about 4 hours of morning sun is usually the "sweet spot" for most varieties.
Soil and Drainage Basics
"Drainage" is a word gardeners use to describe how fast water leaves the soil. Begonias have fleshy stems and roots that store water, which means they do not like to sit in soggy soil. If the roots stay too wet for too long, they can become unhealthy. For a deeper look at planting depth and soil setup, see How Deep Do You Plant Begonias?. (longfield-gardens.com)
For garden beds, you can check your drainage by digging a small hole and filling it with water. If the water is still sitting there an hour later, the soil is a bit too heavy. You can easily fix this by mixing in some compost or leaf mulch to lighten the soil. For containers, always use a high-quality potting mix rather than garden soil, and ensure the pot has at least one drainage hole at the bottom.
Protection from the Elements
Begonias have somewhat brittle stems, especially the large-flowered tuberous varieties. It is a good idea to plant them in a spot that is protected from strong, gusty winds. A location near a fence, a wall, or under a porch is often ideal. This protection helps keep the heavy blooms from snapping off during a summer thunderstorm.
When to Start Your Begonias
Timing is more important than any special fertilizer or "gardening trick." Because begonias are tropical plants, they have no tolerance for frost or even very chilly nights.
Working with Your USDA Zone
Most begonias are only hardy in USDA zones 9 through 11. In most of the United States, we grow them as annuals, meaning we plant them in the spring and they finish their life cycle when the frost arrives in the fall.
We ship our begonias based on your specific hardiness zone to ensure they arrive at the right time for planting. You should wait to move your plants outdoors until the soil has warmed up and the nighttime temperatures stay consistently above 50°F (10°C). In many northern states, this usually happens in late May or early June. For shipping timing and zone guidance, see our Shipping Information page. (longfield-gardens.com)
The Head-Start Method
If you want flowers as early as possible, you can start your begonia tubers indoors about 8 to 12 weeks before the last frost.
- Fill a shallow tray with moist potting mix.
- Place the tubers on top and cover them with just a light dusting of soil.
- Keep them in a warm, bright spot (but not in direct hot sun).
- By the time the weather is warm enough to go outside, you will already have established plants with several leaves.
What to Do Next: Timing Checklist
- Check your local frost dates to find your "safe" window.
- Monitor nighttime temperatures; wait for a consistent 50°F+.
- If starting indoors, begin 2 months before your outdoor move-in date.
- Ensure your indoor spot is warm (around 70°F is perfect for waking up tubers).
How to Plant Begonias Step-by-Step
Whether you are planting tubers you bought from us or transplanting small starts from a nursery, getting the depth and spacing right is a quiet win for garden success.
Planting Tuberous Begonias
When you look at a begonia tuber, you will notice that one side is slightly indented or "hollowed out" like a small bowl. This is the top. The sprouts will grow from this hollow side.
- Depth: Dig a shallow hole and place the tuber inside with the hollow side facing up. Cover it with only about an inch of soil. If you plant them too deep, the sprouts may struggle to reach the surface.
- Spacing: Give them room to breathe. Most tuberous begonias should be spaced 10 to 12 inches apart. This allows for good airflow, which keeps the leaves dry and healthy.
- The "Angled" Trick: If you live in a very rainy climate, some gardeners like to plant the tuber at a very slight angle. This prevents water from pooling in the center of the hollow top, which helps keep the tuber firm and healthy.
Planting Wax Begonias and Starts
If you are planting wax begonias from small nursery pots, the process is even simpler.
- Dig a hole that is the same depth as the pot the plant is currently in.
- Gently remove the plant and place it in the hole.
- Gently firm the soil around the base.
- Space these about 6 to 8 inches apart for a "filled-in" look.
Watering After Planting
Once your begonias are in the ground or pot, give them a gentle drink of water. This helps settle the soil around the roots or tuber. After that initial watering, wait until you see the first green sprouts before you water again. Overwatering a tuber that hasn't started growing yet can cause it to sit in too much moisture. For more planting basics, see our All About Begonias guide. (longfield-gardens.com)
Water Correctly, Not Constantly
Watering is the most important part of begonia care, but it is often misunderstood. The goal is to keep the soil "moist like a wrung-out sponge," not soaking wet.
The "Finger Test"
Before you reach for the watering can, stick your finger about an inch into the soil. If the soil feels damp, your begonia is fine. If the top inch of soil feels dry to the touch, it is time to water. This "deep, then let it dry a bit" method encourages the roots to grow deeper into the soil, making for a much stronger plant.
Where to Water
Always try to water at the base of the plant rather than splashing water over the leaves. Begonia leaves can be sensitive to moisture sitting on them, especially in the evening. Wet leaves can sometimes lead to powdery mildew (a white dusty-looking coating). Watering in the morning is also a great habit because it gives any accidental splashes a chance to dry off in the sun.
Adjusting for Containers
Plants in containers and hanging baskets dry out much faster than plants in the ground. During the hottest weeks of July and August, you might find that your hanging begonias need water every day. If your container feels very light when you lift or tilt it, that is a sure sign it needs a deep soak.
Key Takeaway: Water the soil, not the leaves, and always check the moisture level with your finger before adding more.
Fertilizing for Maximum Blooms
Begonias are "heavy feeders," meaning they use a lot of energy to produce those big, beautiful flowers all summer long. A little bit of extra nutrition goes a long way. For fertilizing and feeding tips, our How to Plant and Care for Begonias: A Complete Grower's Guide covers the essentials. (longfield-gardens.com)
Choosing a Fertilizer
When the plants are young and just growing leaves, a balanced, all-purpose fertilizer (like a 10-10-10) works well. Once you see the first flower buds appearing, you can switch to a fertilizer that is higher in phosphorus (the middle number on the package). This encourages the plant to put its energy into flower production rather than just more leaves.
Frequency
For begonias in the ground, applying a slow-release fertilizer once at planting time is often enough. For begonias in pots, the nutrients wash out of the soil every time you water. To keep them happy, use a water-soluble fertilizer at half-strength every two weeks. This steady "snack" of nutrients keeps the flower production consistent.
Simple Rules for Feeding
- Always apply liquid fertilizer to moist soil; never fertilize a wilted, bone-dry plant.
- Follow the directions on the label—more is not always better.
- If the foliage looks a healthy deep green, your feeding schedule is likely perfect.
Designing Your Outdoor Space with Begonias
Begonias offer incredible flexibility in garden design. Because they come in so many shapes and sizes, you can use them in almost every part of your yard.
Hanging Baskets and Window Boxes
Trailing tuberous begonias are the stars of the hanging basket world. Varieties like the "Illumination" series produce long, cascading stems that are covered in blossoms. When planting these, place the tubers near the edge of the pot and tilt them slightly outward to encourage them to drape over the side. For a fuller hanging display, consider Begonia Non Stop Mix. (longfield-gardens.com)
Shady Borders and Walkways
Wax begonias are the go-to choice for lining a path. Because they stay low to the ground and grow in a neat mound, they create a clean, colorful edge. You can alternate colors—like pink and white—to create a patterned look that lasts all season without needing to be trimmed or mown. For another container-friendly option, Begonia Upright Double Picotee Sunburst adds bright contrast in shady spaces. (longfield-gardens.com)
Mixed Containers
Begonias play well with others. If you are creating a large mixed planter for a shady porch, try this "Thriller, Filler, Spiller" formula:
- Thriller: Use a tall Coleus or a Caladium with variegated leaves for height.
- Filler: Use upright tuberous begonias for bright pops of color.
- Spiller: Use a trailing begonia or Creeping Jenny to cascade over the edge.
Maintaining Your Begonias Through the Season
One of the reasons we love begonias is that they are generally "self-cleaning." This means that when a flower is finished, it often drops off on its own, so you don't have to spend your weekends "deadheading" (removing old blooms). However, a little bit of grooming can keep things looking extra tidy.
Pinching for Fullness
If your begonias (especially wax or cane types) are starting to look a bit tall and thin, you can "pinch" them. Simply use your thumb and forefinger to snip off the very top inch of the main stem. This signals the plant to grow more side branches, resulting in a bushier, fuller plant with more flowers.
Monitoring Health
If you notice the leaves looking a bit pale or yellow, it might be a sign that the plant needs a bit more fertilizer or that the soil is staying a bit too wet. Adjust your watering and see if the new leaves come in a healthier green. If you see tiny holes in the leaves, don't worry too much; begonias are generally deer-resistant and aren't the first choice for most common garden pests.
What to Do When the Season Ends
As the nights begin to get cool in the fall, your begonias will naturally start to slow down. When the foliage begins to turn yellow, it is a signal that the plant is preparing for dormancy.
Saving Your Tubers
In most parts of the U.S., begonias will not survive the winter outdoors. However, you can save the tubers and replant them next year! This is a great way to build your garden collection over time.
- Before the first hard frost, dig up the tubers.
- Cut the stems back to about an inch above the tuber.
- Let them sit in a dry, shady spot for a few days to "cure" (the skin will toughen up slightly).
- Shake off the excess soil and store them in a box filled with peat moss or sawdust.
- Keep the box in a cool, dark, dry place (like a basement) where it won't freeze.
Transitioning Potted Plants
If you have begonias in pots, you can simply move the entire pot into a frost-free area like a garage or basement. Stop watering them and let the soil dry out completely. The plants will go to sleep for the winter and can be woken up with a bit of water and warmth next spring.
Creating a Stress-Free Garden
At Longfield Gardens, we believe that gardening should be a source of relaxation, not a list of difficult chores. Begonias fit this philosophy perfectly. They are forgiving, beautiful, and offer a high reward for very little effort. If you get the timing right and make sure they aren't sitting in puddles, they will reward you with a spectacular show of color.
Whether you are a beginner planting your very first window box or an experienced gardener looking to fill a shady border, begonias are a reliable and joyful choice. We take great care in Lakewood, New Jersey, to ensure that the tubers we send you are healthy, true to their variety, and ready to thrive in your yard.
Key Takeaway: Begonias are one of the best "investment" plants because you can save the tubers and enjoy their beauty year after year. If you want a compact garden-ready option, try Begonia Upright Double Roseform Pink. (longfield-gardens.com)
Conclusion
Growing begonias outdoors is a simple way to bring life and light to the shaded parts of your home. By choosing the right variety for your space, waiting for the warm weather to arrive, and practicing the "finger test" for watering, you can enjoy a lush, tropical-looking garden all summer long. Remember that gardening is an experiment, and begonias are some of the most patient teachers you can find.
- Choose the variety that matches your light—wax for more sun, tuberous for shade.
- Wait until the nights are warm before planting outside.
- Water the base of the plant and keep the soil moist but not soggy.
- Save your tubers in the fall to grow your garden even bigger next year.
We are here to support your gardening journey every step of the way. If you have questions about your plants or need help choosing the perfect color for your patio, our team is ready to provide the practical advice you need. For more help, visit our All About Begonias guide or Shipping Information. (longfield-gardens.com)
Every shaded corner of your garden holds the potential for a spectacular display of color. Let begonias be the plant that turns those quiet spots into your favorite part of the yard.
FAQ
Can begonias grow in full sun?
Most begonias prefer shade or partial shade, but wax begonias with bronze-colored leaves are quite tolerant of the sun. Even then, in very hot climates, they appreciate some protection from the intense afternoon heat to keep their foliage from scorching. For site planning, see Where to Plant Begonias: Sun or Shade?. (longfield-gardens.com)
How often should I fertilize my outdoor begonias?
For begonias in containers, it is best to use a water-soluble fertilizer at half-strength every two weeks during the growing season. For begonias planted in the ground, a single application of slow-release fertilizer in the spring is usually sufficient to keep them blooming until fall. If you want a broader step-by-step reference, see How to Plant and Care for Begonias: A Complete Grower's Guide. (longfield-gardens.com)
Why are the flowers falling off my begonia?
It is natural for begonias to drop their older flowers as they fade to make room for new ones. However, if healthy-looking flowers are dropping prematurely, it may be a sign of heat stress or the soil becoming too dry. Ensure the plant is in a cool, shaded spot and that the soil stays consistently moist.
Do I need to dig up my begonias in the winter?
If you live in a climate where it freezes (USDA zones 3-8), you must dig up tuberous begonias if you want to save them for next year. Wax begonias are usually treated as annuals and replaced each spring, though they can be moved indoors as houseplants if you have a very bright window. For zone-based timing, check our Shipping Information page. (longfield-gardens.com)