Introduction
There is a special kind of excitement that comes with seeing the first vibrant blooms of a begonia on a sunny morning. Whether it is the ruffled petals of a dinnerplate variety or the elegant drape of a trailing begonia, these plants bring a lush, tropical feel to any space. Many gardeners start their begonia journey with a single potted plant on a windowsill or a gift from a friend. As the weather warms, it is only natural to wonder if that potted beauty can make the leap into the garden beds or onto the patio.
At Longfield Gardens, we believe that gardening should be an accessible and rewarding way to enhance your home. Moving your potted begonias outdoors is not just possible; it is often the best way to help them reach their full potential. If you want to browse the plants we carry, our begonia bulbs collection is a good place to start. The fresh air, natural humidity, and improved light levels of the outdoors can transform a modest houseplant into a stunning focal point.
This guide is designed for home gardeners who want to safely transition their potted begonias to the outdoor world. For a broader overview of begonias and their care, see our All About Begonias guide. We will cover how to identify if your begonia is ready for the move, the best way to prepare it for the change in environment, and how to plant it in the ground for a successful summer season. With a few simple steps, you can enjoy these spectacular blooms all the way until the first frost.
Identifying Your Begonia Type
Before you move your plant outside, it is helpful to know which type of begonia you have. While most begonias enjoy a summer vacation outdoors, their specific needs for sun and water can vary. Understanding the variety helps you choose the perfect spot in your yard.
Tuberous Begonias
These are some of the most popular choices for outdoor gardening. Tuberous begonias, like the large-flowered "Switzerland" or various hanging basket types, grow from a thickened underground stem called a tuber. They are famous for their incredibly showy, rose-like flowers. If you are looking for plants made for that style of display, the Hanging Begonias collection is a natural fit. These varieties love the outdoors but are sensitive to heat and direct afternoon sun. They thrive in the filtered light found under tall trees or on a covered porch.
Wax Begonias
Often called bedding begonias, these are the sturdy workhorses of the garden. You can recognize them by their fleshy, succulent-like leaves that look like they have been polished with wax. They are very adaptable and can handle more sunlight than most other types. If you have a potted wax begonia, it will transition very easily into a sunny or partially shaded garden bed.
Rex and Rhizomatous Begonias
These varieties are primarily grown for their stunning foliage rather than their flowers. Their leaves can feature swirls of silver, purple, pink, and deep green. While they are often kept as indoor plants, they love the humidity of a shaded summer garden. Because their leaves are quite delicate, they need a sheltered spot where the wind won't tear them.
Key Takeaway: Most begonias thrive outdoors during the summer, but tuberous and foliage varieties need protection from harsh sun, while wax begonias are more sun-tolerant.
Timing Your Move for Success
One of the most important rules in gardening is that timing beats tricks. Because begonias are tropical plants, they are very sensitive to cold temperatures. Moving them outside too early can stall their growth or damage their leaves. If you want a quick reference for climate, the Hardiness Zone Map can help you line up planting time with your region.
The best time to move potted begonias outside is in late spring or early summer. You should wait until all danger of frost has passed in your area. A good rule of thumb is to wait until nighttime temperatures consistently stay above 60°F. If the nights are still chilly, your begonias will be much happier staying indoors for another week or two.
If you live in a cooler climate, you might feel eager to get started as soon as the sun comes out. However, patience pays off with begonias. Waiting for the soil and air to warm up ensures the plant doesn't experience "temperature shock," which can cause leaves to drop. Think of the move as a summer holiday; you want the weather to be settled and warm before the plants arrive.
Choosing the Perfect Outdoor Spot
Success with begonias starts with the principle of "right plant, right place." Outdoors, the sun is much stronger than it is through a window. Even a plant that sat in a sunny window indoors will need a shaded or sheltered spot once it moves outside.
Light Requirements
Most begonias prefer "dappled sunlight" or "filtered shade." This means the light that peeks through the leaves of a large tree. An ideal location is one that receives gentle morning sun (until about 10:00 AM) and then stays in the shade for the rest of the day. Avoid placing them against south-facing walls, which can trap heat and scorch the leaves.
Protection from Wind and Rain
Begonias have stems that can be somewhat brittle, especially the large-flowered tuberous varieties. A heavy summer downpour or a sudden gust of wind can snap stems or bruise the petals. Choose a spot that is protected by a fence, a hedge, or the side of your house. If you are planting them in the ground, placing them near taller, sturdier perennials can provide a natural windbreak.
Drainage is Essential
Whether you keep your begonia in its pot or plant it in the ground, it must have excellent drainage. "Drainage" is simply a measure of how fast water leaves the soil. Begonias do not like to have "wet feet," which means sitting in soggy soil. If the soil stays too wet for too long, the stems or tubers can rot. If your garden soil is heavy clay, it is better to keep the begonia in a pot or create a raised bed with lighter soil.
How to Acclimatize Your Potted Begonia
You should never move a plant directly from a dim living room to a bright backyard in one day. This process of getting a plant used to the outdoors is called "hardening off." It is a simple, gradual transition that helps the plant toughen up its leaves. For a step-by-step refresher, see our Can I Plant My Begonia Outside? guide.
- Days 1–2: Place your potted begonia in a fully shaded, sheltered spot for just two or three hours in the afternoon. Bring it back inside for the night.
- Days 3–4: Increase the time outdoors to five or six hours. Continue to keep it in the shade and bring it in at night.
- Days 5–7: Leave the plant out all day. If you plan to put it in a spot with a little morning sun, you can start exposing it to that light now. If the nights are warm (above 60°F), you can leave it out overnight.
- Day 8: Your begonia is now ready to be permanently placed in its outdoor home or transplanted into the ground.
What to do next:
- Check your local weather forecast for a stretch of warm nights.
- Identify a shaded spot on your porch or under a tree for the first phase.
- Monitor the leaves for any signs of "bleaching" (white spots), which means the light is too intense.
Planting Potted Begonias into the Ground
Once your begonia is acclimatized, you might decide to plant it directly into your flower beds. This is a wonderful way to create a lush, professional-looking landscape. Tuberous begonias look particularly beautiful when massed together in a shady border.
Preparing the Soil
Start by loosening the soil in your planting area to a depth of about six to eight inches. We recommend mixing in some compost or well-rotted leaf mold. This improves the soil texture and helps it hold just the right amount of moisture while allowing the excess to drain away. If your soil feels very dense, adding a bit of coarse sand or perlite can help.
The Planting Process
Dig a hole that is slightly wider than the pot your begonia is currently in. Carefully turn the pot sideways, place your hand over the soil surface with the plant stems between your fingers, and gently slide the plant out. Try to keep the root ball intact.
Place the plant in the hole so that the top of the root ball is level with the surrounding soil surface. Avoid planting it deeper than it was in the pot, as burying the stems too deep can lead to rot. Gently firm the soil around the roots with your hands to remove any large air pockets.
Spacing and Mulching
If you are planting several begonias, space them about 10 to 12 inches apart. This allows for good air circulation, which helps prevent leaf diseases. After planting, you can apply a thin layer of mulch around the plants. Use something light, like shredded bark or cocoa hulls. This helps keep the soil cool and prevents water from splashing onto the leaves, but be sure to keep the mulch an inch or two away from the main stems.
Caring for Begonias in the Garden
Outdoor begonias are generally low-maintenance, but they do appreciate a little regular attention. Because they are growing more vigorously outside, their needs for water and food will increase. If you want a fuller care overview, our begonia care guide covers the basics in one place.
Watering Correctly
The goal is to keep the soil consistently moist but never soggy. Instead of watering a little bit every day, give the plants a deep soak once or twice a week (depending on the weather). Always try to water at the base of the plant. Wetting the foliage frequently can lead to powdery mildew, a fungus that looks like a dusting of white flour on the leaves. If you notice the soil is still damp to the touch, wait another day before watering again.
Feeding Your Plants
Begonias are "heavy feeders," meaning they use a lot of nutrients to produce those spectacular flowers. Start fertilizing about two weeks after you move them outside. A balanced, water-soluble fertilizer applied every two weeks is usually perfect. If you are growing tuberous begonias specifically for their huge blooms, you can use a fertilizer with a slightly higher middle number (phosphorus) once you see flower buds starting to form.
Deadheading for More Blooms
To keep your begonias looking their best and to encourage more flowers, you should "deadhead" them. This is simply the practice of removing faded or wilted flowers. By snipping off the old blooms, you prevent the plant from putting energy into making seeds. Instead, the plant will put that energy into creating new flower buds. It also keeps the plant looking tidy and prevents old petals from rotting on the leaves.
Managing Outdoor Challenges
While begonias are generally easy to grow, moving them outside does expose them to a few more variables than they faced indoors. At our trial garden at Longfield Gardens, we observe how different environments affect plant health to give you the most practical advice. If you want to time shipments around your region, our Shipping Information page explains how orders are scheduled.
Heavy Rain
Extended periods of rainy weather can be a challenge for begonias. If the soil becomes saturated, the risk of root rot increases. If your begonias are in pots, you can simply move them under a roof or porch during a week of heavy rain. For plants in the ground, ensuring you have the "right place" with good drainage is your best defense.
Pests
One benefit of moving begonias outside is that natural predators often take care of indoor pests like mealybugs. However, you might encounter new visitors like slugs or snails, especially in shady, damp areas. These pests love to nibble on the fleshy leaves. If you see jagged holes in the foliage, you can use non-toxic slug bait or simply remove the pests by hand in the evening.
Summer Heat
In the peak of July and August, temperatures can soar. If you notice your begonias wilting in the afternoon, it is usually a sign of heat stress rather than a lack of water. If the soil is already moist, do not add more water. Instead, you might provide some temporary shade with a piece of lattice or move potted plants to an even cooler spot until the heatwave passes.
Key Takeaway: Consistent moisture, regular feeding, and protection from the hottest afternoon sun are the three pillars of outdoor begonia care.
Bringing Begonias Back Inside for Winter
As summer winds down and the first hints of autumn appear, it is time to plan for the winter. Most begonias cannot survive a freeze. Depending on the type of begonia you have, you have two main options for keeping them until next year.
Keeping Them as Houseplants
Wax begonias and Rex begonias can be transitioned back into the house to live as houseplants during the winter. About two weeks before you expect the first frost, start the "hardening off" process in reverse. Move them to a deeper shade for a few days, then onto a porch, and finally back inside. This helps them adjust to the lower light levels indoors without losing all their leaves.
Storing Tuberous Begonias
If you are growing tuberous begonias, you can save the tubers and replant them next spring. When the leaves start to turn yellow in the fall, stop watering the plant. After the first light frost kills the top growth, carefully dig up the tubers. Cut the stems back to about an inch above the tuber and let them dry in a cool, dark place for a few days. Once dry, you can store them in a box of peat moss or sawdust in a basement or closet where the temperature stays around 50°F.
Conclusion
Moving your potted begonias outside is a rewarding way to enjoy their beauty in a whole new setting. By matching the plant to the right location and following a few simple steps for acclimatization, you can transform your garden into a colorful sanctuary. Whether you choose to keep them in decorative pots or plant them directly into the earth, begonias will reward your care with a continuous display of flowers and foliage.
- Wait for nighttime temperatures to stay consistently above 60°F before moving plants.
- Acclimatize your begonias gradually over 7 to 10 days to prevent sun scorch.
- Ensure your planting site has excellent drainage and protection from harsh afternoon sun.
- Fertilize every two weeks to support vigorous growth and abundant blooming.
"Gardening with begonias is one of the easiest ways to add professional-level color to the shady corners of your yard. These plants are incredibly resilient and offer a beauty that lasts all season long."
We take great pride in our facility in Lakewood, New Jersey, where we evaluate and ship high-quality bulbs and plants. If you are looking to expand your collection, we invite you to explore the many varieties we offer at Longfield Gardens. You can also browse our begonia bulbs and Hanging Begonias collections for more ideas. With the right start and a little bit of sunshine, your garden will be more beautiful than ever.
FAQ
Can I plant my indoor begonia directly in the sun?
Most indoor begonias are adapted to low light and will scorch if placed in direct outdoor sun. It is best to place them in a shaded or dappled light area, especially during the hot afternoon hours. Wax begonias are the exception and can handle more sun if they are acclimated slowly.
How often should I water begonias when they are outside?
Outdoor plants dry out much faster than indoor ones due to wind and heat. Check the soil daily by sticking your finger an inch into the dirt; if it feels dry, it is time to water. In the heat of summer, potted begonias may need water every day, while those in the ground may only need it twice a week.
Do I need to take the begonia out of the pot to plant it?
You can do either! If you have a beautiful decorative pot, you can simply set it on your patio. However, if you want the begonia to grow larger and integrate into your landscape, removing it from its nursery pot and planting it in the ground allows the roots more room to spread.
Will my begonia come back next year if I leave it outside?
In most parts of the United States (zones 3-8), begonias will not survive the winter outdoors. They are tropical plants that perish in freezing temperatures. To keep them for next year, you must either bring them inside as houseplants or lift and store the tubers in a frost-free location.
