Can You Plant a Begonia Outside? Expert Outdoor Care Guide

Introduction

Imagine stepping onto your porch or into your backyard and being greeted by a sea of lush, vibrant blooms that thrive from early summer until the first frost. Begonias are one of the most rewarding plants for home gardeners because they offer nearly endless color with very little fuss. Whether you are looking to brighten up a shady corner or add texture to your patio containers, these versatile plants are up to the task. At Longfield Gardens, we enjoy seeing how these tropical beauties transform North American landscapes into colorful retreats.

Many gardeners first encounter begonias as houseplants, which often leads to the question: can you plant a begonia outside? The answer is a resounding yes, provided you understand their simple needs regarding temperature, light, and soil. If you want to browse the full selection, start with our begonia collection. This guide will help you identify which type of begonia you have and show you exactly how to transition them to your outdoor garden for a spectacular summer display. By following a few basic steps, you can enjoy these stunning flowers in your beds, borders, and hanging baskets all season long.

Identifying Your Begonia Type

Before you grab your trowel and head into the garden, it is helpful to know which variety of begonia you are working with. Different types have slightly different preferences for sun and moisture. While all begonias share a love for warmth, their growth habits and foliage can vary significantly.

Wax Begonias

Wax begonias are the workhorses of the summer garden. You will recognize them by their glossy, succulent-like leaves and compact, mounded growth habit. They typically grow 6 to 12 inches tall and produce clusters of small white, pink, or red flowers. Because they are so reliable and uniform, they are a favorite for mass plantings along walkways or as edging for garden beds.

Tuberous Begonias

If you are looking for "show-stopper" blooms, tuberous begonias are the answer. These plants grow from a thickened underground stem called a tuber. They produce large, dramatic flowers that can look like roses, camellias, or carnations. For a ready-made display, try our Non Stop Begonias collection.

Rex Begonias

Rex begonias are grown primarily for their incredible foliage. Their leaves come in a dizzying array of swirls, stripes, and spots in shades of silver, purple, burgundy, and forest green. While they do produce small flowers, the main attraction is the "painted" look of the leaves. If you want deeper growing tips, see our How to Grow Rex Begonia for Stunning Foliage guide.

Cane Begonias (Angel Wing)

Cane begonias get their name from their tall, bamboo-like stems. The most famous of these is the "Angel Wing" begonia, named for its long, pointed leaves that often feature silver speckles. These begonias can grow quite tall and produce large, pendulous clusters of flowers. For hanging displays, our Hanging Begonias collection is a great place to start.

Key Takeaway: Identifying your begonia type is the first step toward success. Wax begonias are best for borders, tuberous varieties provide the largest flowers, and Rex begonias offer stunning foliage for shady spots.

Timing Your Outdoor Planting

Because begonias are tropical or semi-tropical plants, they have no tolerance for frost. Timing is the most important factor when moving them outside. If you plant too early, a late spring chill can damage the tender foliage or cause the plant to stop growing entirely.

The 50-Degree Rule

The safest rule of thumb is to wait until nighttime temperatures consistently stay above 50°F. In most parts of the United States, this happens several weeks after the last frost date. If the soil is still cold and damp, the plants will struggle to establish roots. For more timing help, read our When Do You Plant Begonias Outside for the Best Blooms? guide.

Hardening Off Your Plants

If your begonias have been growing in a greenhouse or inside your home, they need a "warm-up" period before they live outside full-time. This process is called hardening off.

Start by placing the plants in a shaded, protected spot for a few hours during the day.
Bring them back inside at night.
Over the course of 7 to 10 days, gradually increase their time outdoors and their exposure to light.
This slow transition prevents the leaves from scorching and helps the stems toughen up against the wind.

Shipping and Local Climate

When you order from us, we time our shipments based on your USDA hardiness zone. This ensures your plants or tubers arrive at the appropriate time for your region. You can check our Shipping Information page for more details. However, since weather can be unpredictable, always let your local conditions be your final guide. If an unexpected late frost is predicted after you have planted, a light frost blanket or an upturned bucket can provide enough protection to get them through the night.

Choosing the Perfect Location

Begonias are famous for their ability to thrive in the shade, but "shade" can mean many things. Finding the right balance of light and protection will keep your plants blooming vigorously.

Light Requirements

Most begonias prefer bright, indirect light rather than the harsh, direct afternoon sun. For a deeper look at placement, see our Are Begonias Shade Plants? Light Tips for Best Blooms guide.

In Shady Areas: Tuberous and Rex begonias are happiest in dappled light or morning sun with afternoon shade. Deep, heavy shade may result in fewer flowers and leggy stems.
In Sunnier Areas: Wax begonias are much more sun-tolerant than other types. If you live in a northern climate, they can often handle full sun if they receive plenty of water. In southern climates, they still appreciate some protection during the hottest part of the day.
Foliage Color Tip: Generally, begonias with bronze or dark foliage can handle more sun than those with bright green leaves.

Soil and Drainage

The fastest way to discourage a begonia is to let it sit in "wet feet," which means soil that stays saturated for too long. They require excellent drainage to prevent the stems and roots from rotting.

In the Garden: Choose a spot where water does not puddle after a rain. If your soil is heavy clay, consider planting in raised beds or amending the soil with organic matter like compost or shredded bark to improve the texture.
In Containers: Always use a high-quality potting mix and ensure your pots have drainage holes at the bottom.

Wind Protection

Tuberous and cane begonias have somewhat brittle stems. Large flowers or heavy foliage can catch the wind like a sail, potentially snapping the stems. Planting them in a spot protected by a fence, a wall, or taller garden plants will keep them safe during summer thunderstorms.

What to Do Next:

Identify a spot with morning sun and afternoon shade.

Test your soil drainage by digging a small hole and filling it with water; it should drain within an hour.

Look for a location that offers a bit of shelter from strong winds.

How to Plant Begonias Outside

Once the weather is warm and you have found the right spot, it is time to plant. Whether you are starting with dormant tubers or young plants in nursery pots, the process is straightforward.

Planting Tuberous Begonias

If you are starting with tubers, you might notice one side is slightly indented (concave). This is the top, where the sprouts will emerge.

Prepare the Soil: Loosen the soil to a depth of about 6 inches.
Placement: Place the tuber in the soil with the indented side facing up.
Depth: Cover the tuber with only about half an inch of soil. Planting them too deep can prevent them from sprouting properly.
Spacing: Space tubers about 8 to 12 inches apart to allow for air circulation.

Planting Wax and Foliage Begonias

If you are transplanting young plants from pots:

Dig the Hole: Create a hole that is just as deep and slightly wider than the current root ball.
Gentle Handling: Gently tip the plant out of its pot. If the roots are circling tightly, lightly tease them outward with your fingers.
Leveling: Set the plant in the hole so the top of the root ball is level with the surrounding soil surface.
Backfill: Fill in the space around the roots with soil and press down gently with your hands to remove any large air pockets.

Planting in Containers

Begonias are classic container plants. For a lush look, you can space them slightly closer in a pot than you would in the ground—about 6 to 8 inches apart. If you are building a basket or planter, see our How to Plant a Begonia Hanging Basket guide. Ensure you leave an inch of space between the soil line and the rim of the pot to make watering easier.

Essential Care for Outdoor Begonias

Once your begonias are settled in their outdoor home, a little routine maintenance will keep them looking their best. They are not demanding plants, but they do appreciate consistency.

Watering Correctly

Watering is the most important part of begonia care. These plants have succulent stems that store water, which makes them somewhat drought-tolerant, but they also dislike being bone-dry.

The Finger Test: Stick your finger an inch into the soil. If it feels dry, it is time to water. If it feels moist, wait a day or two.
Water the Base: Always try to water the soil at the base of the plant rather than splashing the leaves. Wet foliage can lead to fungal issues like powdery mildew.
Container Care: Pots dry out much faster than garden beds. During the height of summer, container-grown begonias may need water every day.

Feeding Your Plants

Begonias are "heavy feeders," meaning they use a lot of energy to produce those constant blooms and beautiful leaves.

Slow-Release Fertilizer: You can mix a granular, slow-release fertilizer into the soil at planting time.
Liquid Feed: For an extra boost, use a balanced water-soluble fertilizer every two to three weeks during the growing season. This ensures the plant has the nutrients it needs to keep producing new flower buds.

Deadheading and Pruning

"Deadheading" is the process of removing faded flowers.

Self-Cleaning Varieties: Many modern wax begonias are self-cleaning, meaning the old flowers fall off on their own.
Tuberous Maintenance: For tuberous varieties, removing the spent blooms helps the plant focus its energy on new growth and prevents mold from forming on old petals.
Leggy Growth: If your cane or wax begonias start to look "leggy" or stretched out, do not be afraid to pinch back the tips of the stems. This encourages the plant to branch out and become bushier.

Key Takeaway: Success with begonias comes down to "deep watering, then letting it dry a bit." Consistent feeding and a little light pruning will keep them vibrant all summer.

Managing Pests and Weather Challenges

While begonias are generally easy-going, they can occasionally run into trouble with local wildlife or heavy weather. Being prepared helps you respond quickly.

Wildlife and Insects

Deer and Rabbits: In many areas, deer and rabbits find the tender, succulent leaves of begonias quite tasty. If you have active wildlife in your yard, consider placing your begonias in pots on a high porch or using a physical barrier like a decorative garden fence.
Insects: You might occasionally see mealybugs or aphids. A gentle spray from a garden hose can often knock these pests off. For more persistent issues, an insecticidal soap can be used, following the instructions on the label carefully.
Slugs and Snails: Because begonias love moist, shady spots, they can sometimes attract slugs. Keeping the area around the plants clear of debris and avoiding evening watering can help minimize this.

Handling Heavy Rain

Extended periods of heavy rain can be hard on begonias, as the soil can become waterlogged. If your begonias are in pots, move them under the cover of a porch or eave during long rainy spells. For plants in the ground, ensure the soil is well-draining so the excess moisture can move away from the roots quickly.

Transitioning to Fall: What to Do When the Season Ends

As summer winds down and the nights turn crisp, you have a few options for your begonias. Since they cannot survive a freeze, you must decide whether to treat them as annuals or save them for next year.

Saving Tuberous Begonias

Tuberous begonias can be overwintered and replanted the following spring.

Wait for the Foliage to Yellow: As the weather cools, the plant will naturally start to go dormant.
Dig Them Up: Before the first hard frost, carefully dig up the tubers.
Clean and Dry: Cut off the stems about an inch above the tuber. Let the tubers dry in a cool, dry place for a few days.
Storage: Place the dry tubers in a paper bag or a box filled with peat moss or sawdust. Keep them in a cool, dark place (about 40–50°F) until spring.

Bringing Pots Indoors

Wax, Rex, and Cane begonias can often be brought inside to live as houseplants during the winter. If you want a broader overview, see our Is a Begonia an Indoor or Outdoor Plant? guide.

Before the first frost, bring the pots inside and place them in a bright window.
They may drop a few leaves as they adjust to the lower humidity and different light levels of your home, but they will usually stabilize within a few weeks.
Reduce your watering and stop fertilizing during the winter months when the plant’s growth slows down.

Treating as Annuals

Many gardeners choose to treat wax begonias as annuals, allowing them to fade with the first frost and then replacing them with fresh plants the following spring. This is a simple, low-maintenance way to enjoy begonias without the need for winter storage.

What to Do Next:

Decide in late August if you want to save your tubers or bring pots inside.

Clean your storage containers (boxes or bags) so they are ready for the tubers.

Mark your calendar for the average first frost date in your area so you aren't caught by surprise.

Conclusion

Planting begonias outside is a wonderful way to bring professional-level color and texture to your home landscape. From the classic charm of wax begonias in a garden border to the dramatic, rose-like blooms of tuberous varieties in a hanging basket, there is a begonia for every gardener. By simply waiting for the warm weather, choosing a well-draining spot with the right light, and providing regular water and food, you can enjoy a spectacular display that lasts for months.

We at Longfield Gardens are committed to helping you find the highest quality plants to make your garden goals a reality. Whether you are a beginner or an experienced gardener, we believe that growing begonias should be an enjoyable and rewarding experience. If you want to explore more growing resources, visit our Learn page for guides, charts, and seasonal help.

Wait for nighttime temperatures to reach 50°F before planting.
Match your begonia type to the light levels in your yard.
Prioritize well-drained soil to keep roots healthy.
Consider saving your favorite tubers to enjoy again next year.

Gardening is a journey of discovery, and begonias are the perfect companions to bring a splash of tropical beauty to your outdoor spaces.

FAQ

Can begonias grow in full sun?

Most begonias prefer partial shade or filtered light, but wax begonias are quite sun-tolerant. In cooler northern climates, wax begonias can often handle full sun if the soil is kept consistently moist. However, in hot southern regions, almost all begonias will perform better with protection from the intense afternoon sun.

How often should I water begonias planted outside?

The frequency of watering depends on your soil, the temperature, and whether the plants are in the ground or in pots. As a general rule, check the soil daily and water when the top inch feels dry to the touch. Container-grown begonias dry out faster and may need daily watering during the heat of summer, while those in the ground may only need water every few days.

Why are my begonia leaves turning yellow?

Yellowing leaves are often a sign of overwatering or poor drainage. If the roots stay too wet, they cannot "breathe," which leads to stress and yellowing foliage. Ensure your soil or potting mix drains well and allow the top layer of soil to dry out slightly before watering again.

Do I need to cut back my begonias during the summer?

Most begonias do not require heavy pruning, but "pinching" can help. If your plants are becoming tall and spindly, you can pinch off the tips of the stems to encourage side-branching. This results in a fuller, bushier plant with more flower sites. You should also remove any dead or damaged leaves to keep the plant healthy.

Can You Plant a Begonia Outside?