Table of Contents
- Introduction
- Understanding Which Begonias Can Go Outside
- The Best Time to Move Plants Outdoors
- How to Harden Off Your Begonias
- Choosing the Perfect Outdoor Spot
- Summer Care and Maintenance
- Managing Outdoor Pests and Wildlife
- Planting Indoor Begonias in the Ground
- Transitioning Back Indoors for Winter
- Conclusion
- FAQ
Introduction
There is a special kind of excitement that comes with the arrival of warm weather and the chance to move our favorite plants onto the porch or into the garden. If you have been enjoying the colorful foliage and delicate blooms of begonias inside your home, you might wonder if they would appreciate a summer vacation in the fresh air. Moving indoor plants outside can give them a fantastic growth boost and help them look more vibrant than ever.
At Longfield Gardens, we want to help you make the most of every growing season. Transitioning indoor begonias to the outdoors is a wonderful way to expand your garden and give your houseplants a healthy change of scenery. This guide will help you understand which begonias are best suited for the move, how to transition them safely, and what they need to thrive under the summer sun.
Yes, most indoor begonias can spend the summer months outside as long as you wait for warm temperatures and provide the right amount of shade and protection. If you grow Non Stop Begonias, they are especially rewarding outdoors.
Understanding Which Begonias Can Go Outside
Before moving your plants, it helps to identify what kind of begonia you have. While almost all begonias enjoy the humidity and light of the outdoors, their specific needs for sun and water can vary.
Rex Begonias
These are primarily grown for their stunning, multi-colored foliage. They have large, often textured leaves in shades of silver, purple, pink, and green. Because they are native to forest floors, they are quite sensitive to direct sunlight. When moving a Rex begonia outside, it must stay in a fully shaded or very lightly dappled area. For a closer look at this low-light group, see Are Begonias Low Light Plants? A Guide to Proper Care.
Cane Begonias (Angel Wing)
Named for their tall, bamboo-like stems and wing-shaped leaves, these are vigorous growers. They often produce clusters of dangling flowers. Cane begonias are generally sturdier than Rex varieties and can handle a bit more light, though they still prefer protection from the hot afternoon sun. For more on these arching beauties, see How to Care for Angel Wing Begonia Plants for Better Blooms.
Tuberous Begonias
These begonias grow from a thick, potato-like tuber. They are famous for their large, rose-like flowers and are often sold as both houseplants and outdoor bedding plants. At Longfield Gardens, we specialize in high-quality tubers that produce massive, colorful blooms. These thrive in containers on shady patios, and Begonia Hanging Pink Balcony is a lovely cascading choice.
Wax Begonias
Often found in garden centers as small bedding plants, these have waxy, succulent-like leaves. They are very resilient and can often handle more sun than other types, provided they get enough water. For a closer look at how this classic bedding type fits into the garden, see Are Begonias Annual Plants? Tips to Grow Them All Year.
Key Takeaway: Most indoor begonias are tropical or semi-tropical. They love the humidity of the outdoors but need to be protected from direct, harsh sunlight and cold temperatures.
The Best Time to Move Plants Outdoors
Timing is everything when it comes to tropical plants. Begonias are very sensitive to cold and can be damaged if the temperature drops too low.
The most important rule is to wait until the danger of frost has completely passed. However, "frost-free" isn't quite enough for a happy begonia. You should wait until nighttime temperatures are consistently above 50°F (10°C). If the nights are still chilly, the plant’s growth may stall, or the leaves may turn yellow and drop.
In most parts of the US, late May or early June is the ideal window. If you live in a northern climate, your soil and air might take a little longer to warm up. It is always better to wait an extra week for steady warmth than to rush them out and risk a cold snap.
What to do next:
- Check your local 10-day weather forecast.
- Ensure the lowest predicted nighttime temperature is 50°F or higher.
- Have a plan to bring pots back inside temporarily if an unexpected cold night occurs.
How to Harden Off Your Begonias
You cannot move a plant directly from a climate-controlled living room into the bright, breezy outdoors all at once. This process is called "hardening off," and it allows the plant to gradually adjust to stronger light, wind, and temperature swings.
- Day 1-2: Place your begonia in a very sheltered, fully shaded spot for just two to three hours during the warmest part of the day. Bring it back inside afterward.
- Day 3-4: Increase the time to four or five hours. Keep the plant in the shade, but perhaps move it to a spot with slightly more air movement.
- Day 5-7: If the weather stays warm, you can leave the plant out all day. By the end of the week, if nighttime temperatures are safe, the plant can stay out overnight.
- Observation: Watch for signs of stress. If the leaves look bleached or white, they are getting too much sun. If the edges are crispy, they may be getting too much wind or not enough water.
Moving slowly prevents "sunscald," which is essentially a leaf sunburn that can’t be undone. A gradual transition ensures the plant stays lush and green. For more planting timing tips, see Tips for Growing Tuberous Begonias.
Choosing the Perfect Outdoor Spot
Once your begonia is adjusted, you need to find its "forever home" for the summer. The "right plant, right place" rule is essential here.
Light Requirements
In their native habitats, begonias are "understory" plants. This means they grow on the ground beneath tall trees. They love bright, filtered light but hate direct mid-day sun.
- Morning Sun: An east-facing porch that gets gentle sun until 10:00 AM is usually perfect.
- Dappled Shade: Under a high-canopy tree where light "flickers" through the leaves is ideal.
- Deep Shade: If you have a north-facing wall or a deeply covered porch, Rex begonias will thrive there.
If you want a dependable upright option for window boxes or garden beds, Upright Double Begonias are a great fit.
Wind and Rain Protection
Begonia stems can be quite brittle, especially Cane and Tuberous varieties. A heavy summer thunderstorm or a gust of wind can snap them easily. Try to place your pots near a wall, on a sturdy plant stand, or tucked behind other larger, wind-resistant plants.
Soil and Drainage
If you are keeping your begonias in pots, ensure the containers have drainage holes. Outdoor plants often face heavy rain, and begonias sitting in soggy soil are prone to root rot. If you choose to plant your indoor begonias directly in a garden bed, ensure the soil is loose and rich in organic matter to help water move through quickly.
"Finding the right balance of light and protection is the secret to huge, healthy begonias. They want to see the sky, but they don't want to feel the burn of the sun."
Summer Care and Maintenance
When begonias move outside, their metabolism speeds up. They grow faster, breathe more, and use more resources than they do indoors.
Watering Correct
Outdoor air and wind cause soil to dry out much faster than it does inside. During a hot spell, you may need to water your begonias every day or every other day.
- The Finger Test: Stick your finger an inch into the soil. If it feels dry, water deeply until water runs out the bottom of the pot.
- Avoid the Leaves: Try to water the soil directly. Getting the leaves wet in the heat of the day can cause spotting, and wet leaves at night can encourage mildew.
Feeding for Growth
Because outdoor begonias grow more vigorously, they need extra fuel. We recommend using a balanced, water-soluble fertilizer every two to three weeks. If you have a flowering variety like a Tuberous or Wax begonia, look for a fertilizer with a slightly higher middle number (phosphorus) to encourage more blooms. If you prefer a compact shade choice, Begonia Upright Double Superba Pink is a great fit.
Grooming and Pruning
Begonias are generally tidy, but they benefit from a little "housekeeping."
- Pinching: If your Cane begonia is getting too tall and "leggy," you can pinch off the top inch of growth. This encourages the plant to grow bushier rather than just taller.
- Deadheading: For flowering types, remove spent blooms. This prevents the plant from putting energy into seed production and keeps it focused on making new flowers.
- Leaf Removal: If a leaf looks tattered or yellow, snip it off at the base of the stem to keep the plant looking fresh.
Managing Outdoor Pests and Wildlife
One of the benefits of moving plants outside is that natural predators (like ladybugs and lacewings) often take care of common indoor pests like mealybugs and spider mites. However, the outdoors brings new visitors.
Insects
Keep an eye out for slugs and snails, especially if your begonias are planted in the ground or sitting on a low patio. They love the succulent leaves of begonias. Elevating your pots on a table or plant stand is an easy way to keep them out of reach.
Wildlife
Deer and rabbits generally find begonias quite tasty. If you have active wildlife in your yard, it is best to keep your begonias on a high porch or inside a screened-in area. Tuberous begonias are particularly attractive to squirrels and chipmunks, who may try to dig in the pots.
Disease
In humid summer weather, begonias can sometimes develop powdery mildew, which looks like a dusting of white flour on the leaves. The best way to prevent this is to ensure there is plenty of space between your plants for air to circulate.
What to do next:
- Check the undersides of leaves once a week for any unwanted guests.
- Group plants together for humidity, but leave a few inches of space between pots for airflow.
- If you see slugs, move the pot to a higher location.
Planting Indoor Begonias in the Ground
While most people keep their indoor begonias in pots for the summer, you can certainly plant them directly in the garden. This is a great way to fill a shady gap in your landscape.
If you choose to plant in the ground, remember that you will need to dig them back up before the first frost in autumn.
- Prepare the Soil: Mix in some compost to help with drainage and nutrients.
- Spacing: Leave enough room for the plant to double in size over the summer.
- Mulch: A thin layer of bark mulch around the base helps keep the roots cool and prevents soil from splashing onto the leaves during rain.
In many regions, we use begonias as "annuals," meaning we enjoy them for one season and let them go when the frost hits. However, if you have a favorite indoor plant, you should always keep it in a container so you can easily move it back to safety. For a big, mixed display, Begonia Upright Double Superba Mix - Bulk Offer can fill a shady bed beautifully.
Transitioning Back Indoors for Winter
As summer winds down and the nights start to feel crisp, it is time to bring your begonias back inside. Do not wait for the first frost; by then, it is often too late for tropical plants.
Bring your begonias back inside when nighttime temperatures regularly drop toward 50°F. Before you bring them in, give them a thorough inspection.
- The Wash Down: Gently spray the foliage with water to knock off any hitchhiking insects.
- Soil Check: Check the surface of the soil for any stowaways like ants or slugs.
- Expect Some Change: It is normal for a begonia to drop a few leaves when it moves back inside. The air in our homes is much drier and the light is much lower than it is outdoors. Don't panic; just place it in its usual indoor spot and reduce your watering slightly as the plant’s growth slows down for winter. For step-by-step storage help, see How to Overwinter Begonia Plants: A Step-by-Step Guide.
Conclusion
Moving your indoor begonias outside for the summer is a rewarding way to see these tropical beauties reach their full potential. With fresh air, natural humidity, and the right amount of shade, your plants will likely reward you with lush foliage and a profusion of blooms. By following a simple hardening-off process and keeping a close eye on the thermometer, you can ensure a safe and happy transition for your greenery.
Our team at Longfield Gardens is always here to support your gardening journey with high-quality plants and practical advice. Whether you are growing Tuberous begonias for their spectacular flowers or Rex begonias for their artistic leaves, giving them a summer outdoors is one of the best treats you can provide.
- Wait for consistent 50°F nights before moving plants out.
- Provide bright, filtered light and avoid direct afternoon sun.
- Water more frequently than you would indoors.
- Inspect for pests before bringing them back inside in the fall.
Final Tip: Gardening should be a joy, not a chore. If a plant seems unhappy in one spot, simply move the pot to a different location and see how it responds!
FAQ
Can all indoor begonias be planted in the ground outside?
Most indoor begonias can be planted in the ground, provided the soil is well-drained and the location is shady. However, it is usually easier to keep "houseplant" varieties in containers. This allows you to move them easily if the weather gets too rough and makes the transition back indoors much simpler when fall arrives.
Do begonias need a lot of sun when they are outdoors?
No, most begonias prefer partial to full shade. While some varieties, like Wax begonias, can tolerate more sun, most indoor types like Rex or Cane begonias will suffer from leaf burn if left in direct afternoon sunlight. Filtered light under a tree or a covered porch is the most successful outdoor environment for them.
How often should I water my begonias once they are outside?
Outdoor begonias generally need more frequent watering than indoor ones because of increased evaporation from wind and heat. You should check the soil daily; if the top inch feels dry, it is time to water. Always ensure your pots have drainage holes so the roots do not sit in stagnant water after a heavy rain.
What should I do if my begonia leaves turn yellow after moving outdoors?
Yellow leaves can be a sign of a few different things, but most commonly it is a reaction to a sudden change in temperature or overwatering. If you moved the plant out during a cold snap, bring it back inside until the weather warms up. If the soil is very soggy, let it dry out for a few days and ensure the pot is draining properly.