Introduction
The arrival of spring brings the exciting possibility of moving your gardening efforts from the windowsill to the patio. Begonias are among the most rewarding plants to transition outdoors because they offer a tropical flair and continuous color that lasts until the first frost. Whether you have been nurturing a potted plant indoors or are starting with fresh tubers from Longfield Gardens begonia tubers, these versatile beauties are more than ready to join your outdoor landscape.
In this guide, we will walk you through the simple steps to ensure your begonias thrive in the open air. We will cover the best timing for planting, how to choose the right location, and the easy care routines that keep them blooming all summer long. Moving your begonias outside is a straightforward process that rewards you with lush foliage and vibrant flowers. With a few basic steps, you can confidently enjoy these stunning plants as the centerpiece of your summer garden.
Choosing the Right Begonia for Your Garden
Before you move your plants into the sun, it is helpful to know which type of begonia you are growing. Different varieties have slightly different preferences for light and space. Most begonias found in home gardens fall into three main categories: tuberous, wax, and foliage types.
Tuberous Begonias
These are the showstoppers of the begonia world. They grow from a thick, potato-like tuber and produce large, often double blooms that look like roses or camellias. Tuberous begonias are excellent for containers, hanging baskets, and shaded garden beds. They are particularly prized for their ability to bloom continuously from mid-summer through the autumn months.
Wax Begonias
Wax begonias are the hardy workhorses of the summer border. They have fibrous roots and smaller, succulent-like leaves with a waxy finish. These plants are often used as bedding plants because they are very reliable and can handle a bit more sunlight than their tuberous cousins. They typically grow in tidy mounds and are covered in small white, pink, or red flowers.
Foliage Begonias
Varieties like Rex begonias or Angel Wing (Cane) begonias are often grown primarily for their stunning leaves. While they do produce flowers, the main attraction is the metallic silver, deep purple, or swirling green patterns on their foliage. These varieties are common as houseplants, but they love spending their summer months in a sheltered, shady spot outdoors.
The Best Time to Move Begonias Outside
The most important factor in outdoor success is timing. Begonias are tropical plants that originated in warm, humid climates. They have very little tolerance for cold temperatures. If you plant them too early, the cool soil and chilly nights can stall their growth or damage the tender stems.
Wait for Warm Soil
It is tempting to plant as soon as the first warm day of spring arrives. However, begonias prefer soil temperatures to be at least 60°F. In most regions, this happens several weeks after the last expected frost date. A good rule of thumb is to wait until you are comfortably wearing a light jacket or t-shirt in the evenings before moving your plants out permanently.
Monitor Nighttime Temperatures
While daytime temperatures might feel pleasant, the overnight lows are what truly matter. Begonias are happiest when night temperatures stay consistently above 50°F to 55°F. If a late spring cold snap is predicted, it is best to keep your plants indoors for a few more days or bring pots back inside for the night.
Key Takeaway: Patience is your best tool. Waiting until the weather is settled and the soil is warm ensures your begonias start the season with plenty of energy and vigor.
Finding the Perfect Outdoor Location
Success with begonias outside depends heavily on "right plant, right place." Because they are native to forest floors and tropical understories, they generally prefer protection from the harshest elements.
Light Requirements
Most begonias thrive in filtered light or partial shade. Direct, midday sun can be too intense and may scorch the leaves, leaving brown, crispy edges.
- Morning Sun: A spot that gets four hours of gentle morning light followed by afternoon shade is often ideal.
- Dappled Shade: The area under a tall tree with an open canopy provides the perfect "polka-dot" light that begonias love.
- Deep Shade: While begonias can grow in full shade, they may produce fewer flowers. If your plant looks "leggy" or stretched out, it might need just a little more light.
Protection from Wind
The stems of begonias, especially the large-flowered tuberous types, are quite brittle. They can snap easily in high winds or during a heavy summer downpour. Choose a spot that is somewhat sheltered, such as near a fence, under a porch, or nestled among other sturdy garden plants. If you are growing upright varieties in a windy area, a small bamboo stake can provide helpful support.
Soil and Drainage
Begonias need "well-drained soil," which simply means the water should move through the soil easily rather than sitting in a puddle.
- In the Ground: If your garden soil is heavy clay, consider planting in a raised bed or adding some compost to improve the texture.
- In Containers: Always use a high-quality potting mix and ensure your pots have drainage holes at the bottom. Standing water is the most common cause of plant stress, so giving those roots air and drainage is a major win.
How to Transition Your Begonias Outside
If your begonias have been living indoors or in a greenhouse, they need a "warm-up" period before they move outside full-time. This process is called hardening off. It allows the plant to get used to the wind, fluctuating temperatures, and brighter light.
- Start Slow: On a mild, overcast day, set your plants outside in a fully shaded, protected spot for two to three hours.
- Increase Exposure: Each day, leave them out for an extra hour or two. Gradually move them into slightly more light, such as the area they will eventually live in.
- Check the Nights: Bring the plants back inside every evening for the first week.
- Final Move: After 7 to 10 days of this transition, your begonias will be tough enough to stay outside overnight and handle the natural environment.
What to do next:
- Check your local 10-day weather forecast for any sudden cold dips.
- Prepare your pots or garden beds with fresh soil or compost.
- Gather your gardening gloves and a small trowel for planting.
Planting Tuberous Begonias in the Garden
If you are starting with tubers rather than established plants, the process is slightly different. Many gardeners start their tubers indoors in late winter to get a head start, but you can also plant them directly in the garden once the soil is warm.
Determining Which Side is Up
Begonia tubers have a unique shape. One side is usually rounded, and the other side has a slight hollow or "bowl" shape. The hollow side is the top. This is where the new stems and leaves will emerge. If you are ever unsure, look for tiny pink or white buds (called "eyes")—those should always face the sky.
Planting Depth and Spacing
Proper depth is a quiet winner in the garden. For begonias, you don't need to dig a deep hole.
- Depth: Place the tuber in the soil so the top is covered by only about one inch of soil. If you plant them too deep, the stems might struggle to reach the surface.
- Spacing: Give your plants room to breathe. Space tubers about 10 to 12 inches apart. Good airflow between plants helps prevent common leaf issues like powdery mildew.
Tilted Planting Tip
In areas that get a lot of rain, some gardeners like to plant the tuber at a very slight angle. This prevents water from pooling in the hollow "bowl" of the tuber, which keeps the plant dry and happy as it begins to grow.
Planting Wax Begonias for Summer Color
Wax begonias are usually purchased as "starts" in small plastic packs. Because they are so affordable and reliable, they are perfect for filling large borders or creating colorful patterns in the landscape.
Grouping for Impact
While a single wax begonia is pretty, they look best when planted in groups. Planting them in "drifts" or clusters of three, five, or seven creates a more professional, lush look. Space them about 6 to 8 inches apart. As they grow, they will fill in the gaps to create a solid carpet of color.
Soil Prep for Bedding Plants
Wax begonias are not very fussy about soil, but they do appreciate a little organic matter. Mixing a bit of compost into the planting hole gives them a slow-release boost of nutrients and helps the soil hold just the right amount of moisture.
Growing Begonias in Containers and Baskets
Many of the best begonia varieties, such as the cascading Non Stop begonias, are designed specifically for hanging baskets and window boxes. Containers are a great choice because they allow you to move the plants around to find the perfect light.
Choosing the Right Pot
A 12-inch hanging basket can comfortably hold two or three begonia tubers. If you are using a large patio planter, you can mix begonias with other shade-loving plants like coleus or ferns. Just ensure that all the plants in the pot have the same water and light needs.
Watering in Containers
Soil in pots dries out much faster than soil in the ground. During the heat of summer, you may need to water your containers every day. The best way to tell is to stick your finger about an inch into the soil. If it feels dry, it's time to water. If it feels damp, wait another day.
Key Takeaway: Containers offer the flexibility to protect begonias from heavy rain or scorching afternoon sun, making them a very beginner-friendly way to grow these flowers.
Summer Care for Outdoor Begonias
Once your begonias are settled in their outdoor home, they only require a few simple tasks to keep them looking their best throughout the season.
Watering Correctly
The golden rule for begonias is "deeply, then let it dry a bit." Most begonias like to stay moist but never saturated. When you water, aim for the base of the plant rather than splashing the leaves. Watering in the morning is best because it allows any moisture on the foliage to dry out during the day.
Feeding Your Plants
Begonias are moderate "feeders," meaning they like a regular supply of nutrients to keep producing those big flowers. Use a balanced, water-soluble fertilizer every two weeks. If you are growing tuberous begonias, look for a fertilizer with a slightly higher middle number (phosphorus) to encourage more blooms.
Deadheading and Tidying
"Deadheading" is simply the process of removing faded flowers. For many begonias, the old flowers will drop off on their own. However, removing them by hand keeps the plant looking neat and prevents the plant from putting energy into seed production. If you see a yellowing leaf or a broken stem, simply snip it off with a clean pair of scissors.
Managing Pests and Weather Challenges
Gardening always comes with a few surprises, but begonias are generally very resilient. By keeping an eye on your plants, you can catch any issues before they become a problem.
Common Pests
Outdoors, you might occasionally see aphids or slugs.
- Slugs: These pests love the succulent stems of begonias. If you see jagged holes in the leaves, a bit of organic slug bait or a gravel mulch around the base of the plant usually solves the issue.
- Aphids: These tiny insects usually cluster on new growth. A quick blast of water from the hose is often enough to knock them off.
Mildew and Leaf Care
If your begonias are in a spot with very little airflow and high humidity, you might see a white, flour-like dusting on the leaves called powdery mildew. You can prevent this by:
- Spacing plants properly.
- Watering the soil, not the leaves.
- Moving the plant to a slightly more open area.
Heat Waves
During extreme heat, begonias might look a bit wilted in the afternoon. This is often a natural defense mechanism to conserve moisture. Check the soil before watering; if the soil is still damp, the plant is likely just resting and will perk up once the sun goes down.
What to Do When the Season Ends
As autumn approaches, you have choices to make depending on where you live. Begonias will continue to look beautiful until the first frost, which will cause the foliage to turn black and soften.
Saving Tuberous Begonias
If you live in a cold climate, you can save your begonia tubers and plant them again next year.
- Lift the Tubers: After the first light frost kills the foliage, carefully dig up the tubers.
- Dry Them Out: Cut the stems back to about an inch and let the tubers dry in a cool, shaded spot for a few days.
- Store for Winter: Place the dry tubers in a box filled with peat moss or shredded paper. Keep them in a cool, dark, and frost-free place (like a basement) until next spring.
Treating Them as Annuals
Many gardeners choose to treat wax begonias and some tuberous varieties as annuals. This means you simply enjoy them all summer and then add them to your compost pile in the fall. This is a great option if you don't have a good storage space or if you like to try new varieties every year.
Moving Foliage Begonias Back Inside
If you moved your Rex or Angel Wing begonias outside for the summer, remember to bring them back inside before the night temperatures drop below 50°F. Give them a gentle rinse with water to ensure no "hitchhiking" bugs come inside with them.
Conclusion
Planting your begonias outside is one of the easiest ways to bring high-impact color to the shaded corners of your yard. By waiting for warm weather and choosing a sheltered spot with filtered light, you set the stage for a successful growing season. Whether they are spilling over the edges of a hanging basket or lining a garden path, these plants offer a classic beauty that never goes out of style.
At Longfield Gardens, we enjoy seeing how these versatile plants transform outdoor spaces with very little effort. With the right timing and a bit of regular water, your begonias will thrive from the first days of summer until the very end of fall.
Key Takeaway: The secret to outdoor begonia success is simple: warm soil, dappled shade, and consistent moisture. Get these three things right, and your garden will be the talk of the neighborhood.
Ready to start your own display? Browse our selection of premium begonia tubers to find the perfect colors for your garden this season, and check our shipping information before you order.
FAQ
Can I plant my indoor begonia directly in the ground?
Yes, you can move indoor begonias to the ground, but you must harden them off first by gradually exposing them to outdoor conditions. Ensure the soil is warm and well-draining, and choose a location that offers plenty of shade to prevent the leaves from burning in the direct sun.
How much sun can a begonia handle outside?
Most begonias prefer partial shade or filtered light, ideally receiving only gentle morning sun. While wax begonias with bronze foliage can handle a bit more sunlight, tuberous and foliage begonias will likely scorch if left in the intense afternoon sun for too long.
Do I need to dig up my begonias every winter?
If you live in a climate with freezing winters (USDA zones 3-8), you must dig up tuberous begonias and store them indoors if you want to keep them for next year. In warmer climates (zones 9-11), they can often stay in the ground year-round as long as the soil does not stay too wet during the winter months. For zone details, use the Hardiness Zone Map to check your area.
Why are the leaves on my outdoor begonia turning brown at the edges?
Brown, crispy edges are usually a sign of either too much direct sunlight or inconsistent watering. Check to see if the plant is getting hit by harsh afternoon sun, and ensure you are watering deeply whenever the top inch of soil feels dry to the touch. For more growing basics and seasonal planning, visit our Learn page.
If you want reassurance before planting, Longfield Gardens’ About Us page explains our 100% Quality Guarantee and commitment to reliable plants.
