Introduction
Few plants offer the effortless charm and season-long color of begonias. Whether you are looking to brighten a shady corner of your porch or add lush texture to a garden bed, these versatile plants are a perfect choice. At Longfield Gardens, we enjoy how begonias provide nonstop blooms from early summer all the way through the first frost. Their ability to thrive in areas where other flowers might struggle makes them a favorite for gardeners of all experience levels.
In this guide, we will explore everything you need to know about successfully growing begonias in your outdoor landscape. We will cover the best timing for planting, how to choose the right location, and simple care steps to keep your plants looking their best. By understanding a few basic needs, you can enjoy a vibrant outdoor display that lasts for months. Begonias can absolutely thrive outside as long as they are protected from the cold and given the right balance of light and moisture.
Understanding Begonia Types for the Outdoors
Before you head out to the garden, it is helpful to know which type of begonia you have. While all begonias share a love for warmth, different varieties have slightly different preferences for sun and soil. Recognizing these types helps you place them in the best possible spot.
Wax Begonias (Fibrous-Rooted)
Wax begonias are the classic "bedding" plants often seen in parks and front borders. They are known for their waxy, succulent-like leaves and compact growth habit. These are tough little plants that handle outdoor conditions very well. They come with either green or bronze foliage. A helpful tip to remember is that bronze-leaf varieties usually handle more direct sunlight than the green-leaf types.
Tuberous Begonias
If you want large, rose-like flowers that trail beautifully over the sides of a container, tuberous begonias are the answer. These grow from a central tuber (a thickened underground stem) and are famous for their intense colors and dramatic blooms. At Longfield Gardens, we often recommend these for hanging baskets and window boxes where their cascading stems can be fully appreciated.
Rex and Rhizomatous Begonias
While these are often grown as houseplants, they make stunning additions to the outdoor garden during the summer. They are grown primarily for their incredible foliage, which features swirls of silver, purple, pink, and deep green. Outside, they act as a "thriller" in container arrangements, providing architectural interest that lasts all season.
Cane Begonias (Angel Wing)
Cane begonias are named for their upright, bamboo-like stems. Their leaves are often shaped like wings and may feature beautiful silver spotting. These plants can grow quite tall in a single season, making them excellent choices for large patio pots where they can serve as a focal point.
Key Takeaway: Match the begonia type to your garden goal. Use wax begonias for borders, tuberous begonias for hanging baskets, and Rex varieties for stunning foliage in shaded containers.
When to Move Your Begonias Outside
Timing is the most important factor when moving begonias into the garden. Because they are tropical in origin, they have no tolerance for frost. Planting too early into cold soil can stall their growth or damage the tender stems.
The best rule of thumb is to wait until nighttime temperatures are consistently above 50°F. In most regions, this happens a week or two after the last expected frost date. It is better to wait an extra week for the soil to warm up than to rush them into a chilly environment. If the soil feels cold to the touch, your begonias will appreciate a bit more time in a protected area.
If you have started your begonias indoors or bought them from a greenhouse, they need a short transition period called "hardening off." This simply means getting them used to the outdoors gradually. Start by placing them in a sheltered, shady spot for a few hours a day. Over the course of a week, slowly increase their time outside and their exposure to light. This prevents the leaves from scorching or becoming stressed by the wind.
- Check your local frost dates before planning your planting day.
- Monitor nighttime lows; 50°F is the magic number for begonias.
- Keep plants in their nursery pots until the weather is settled and warm.
For additional timing guidance, see when to plant begonias.
Choosing the Best Outdoor Location
Right plant, right place is a core principle for gardening success. Begonias are famous for their love of shade, but "shade" can mean many things. Finding the sweet spot for light and wind protection will make a big difference in how many flowers your plants produce.
Light Requirements
Most begonias prefer filtered light or dappled shade. This is the kind of light you find under a tall tree or on a covered porch. Direct, harsh afternoon sun can be too intense and may cause the leaves to turn brown or crisp at the edges.
However, they do need some light to bloom well. A spot that gets four hours of morning sun followed by afternoon shade is often ideal. If you notice your plants are becoming "leggy" (tall and thin with few flowers), they might be asking for a little more light. If the leaves look bleached or yellow, they may be getting too much sun.
For more detailed placement advice, read where begonias like to be planted.
Protection from the Elements
Begonias have brittle stems that can snap in high winds. When choosing a spot, look for an area that is somewhat protected from strong gusts. Placing containers near a wall, fence, or among other sturdier plants provides a helpful windbreak.
Soil and Drainage
"Drainage" simply refers to how fast water leaves the soil. Begonias hate "wet feet," which means they should never sit in soggy, waterlogged dirt. For garden beds, adding some compost or organic matter can help fluff up the soil and improve drainage. For containers, always use a high-quality potting mix and ensure the pot has at least one drainage hole at the bottom.
Step-by-Step Guide to Planting Outside
Once the weather is warm and you have picked your spot, it is time to plant. Following a simple process ensures the roots settle in quickly and start growing.
Planting in Garden Beds
- Prepare the Soil: Loosen the soil to a depth of about six inches. If your soil is heavy clay, mix in some compost to improve the texture.
- Dig the Hole: Create a hole that is slightly wider than the root ball of your plant.
- Position the Plant: Remove the begonia from its pot and place it in the hole. The top of the root ball should be level with the surface of the surrounding soil. Planting them too deep can lead to stem rot.
- Fill and Firm: Gently fill the hole with soil and press down lightly with your hands to remove any large air pockets.
- Water In: Give the plant a gentle drink of water to settle the soil around the roots.
For additional guidance, see this guide to planting begonias in flower beds.
Planting in Containers
Begonias are perhaps the ultimate container plants. When planting in pots, you can space them a bit closer together than in the ground to create an "instant" full look.
- Select a Pot: Ensure it has drainage holes. A terra cotta or plastic pot both work well, though terra cotta dries out faster.
- Fill with Mix: Use a fresh potting mix. Avoid using garden soil in containers, as it is too heavy and won't drain properly.
- Space Properly: For most varieties, spacing them 6 to 10 inches apart allows enough room for air to circulate while still looking lush.
- Planting Depth: Just like in the ground, keep the base of the stems at the soil level.
If you prefer upright flowers for containers, explore the upright double begonia collection.
Key Takeaway: Whether in a bed or a pot, the goal is "level and loose." Keep the plant level with the soil surface and use loose, well-draining soil to encourage healthy root growth.
Watering and Feeding for Maximum Blooms
Outdoor begonias have a high metabolism during the heat of summer. They are hard at work producing leaves and flowers, so they need consistent support.
How to Water Correctly
The best way to water begonias is "deeply and then wait." Instead of giving them a tiny splash every day, soak the soil thoroughly until water runs out of the bottom of the pot or the ground feels moist several inches down. Then, let the top inch or two of soil dry out before watering again.
Overwatering is a common mistake. If the soil is always swampy, the roots cannot breathe and may begin to rot. You can check the moisture by sticking your finger into the soil. If it feels damp, wait another day. Avoid getting water directly on the leaves if possible, as this helps prevent mildew issues. Watering in the morning is ideal, as it allows any accidental moisture on the foliage to dry in the sun.
For more detailed advice, read how to care for a begonia plant.
Feeding Your Plants
Begonias are "heavy feeders," meaning they use up nutrients in the soil quickly to produce those constant blooms. In our trial gardens at Longfield Gardens, we find that a regular feeding schedule makes a noticeable difference.
You can use a balanced, water-soluble fertilizer once every two to four weeks. Look for a fertilizer formulated for flowering plants, which often has a bit more potassium to support bloom production. If you are growing begonias in containers, they need more frequent feeding than those in the ground because nutrients wash out of the potting mix every time you water.
- Water at the base of the plant to keep leaves dry.
- Use the "finger test" to check soil moisture before watering.
- Fertilize regularly to keep the flower show going through September.
Protecting Your Begonias from Pests and Weather
While begonias are generally easy-going, they can sometimes face challenges from the local environment. Being proactive helps your plants stay healthy and beautiful.
Dealing with Wildlife
In some neighborhoods, deer and rabbits can be a concern. While begonias are not their first choice, hungry animals may still take a nibble. If you have a high population of deer, placing your begonias on a raised porch or in hanging baskets usually keeps them out of reach. For garden beds, a small decorative fence or a natural repellent spray can help.
Small garden visitors like chipmunks sometimes enjoy digging in the soft potting soil of containers. If this happens, you can place a layer of large pebbles or a bit of mulch on the soil surface to discourage them.
Managing Rain and Heat
Extended periods of heavy rain can sometimes be hard on begonias, as the soil stays too wet for too long. If you have begonias in pots and a week of heavy rain is forecast, you might move them under the eaves of the house or onto a covered porch until the weather clears.
In periods of extreme heat (90°F and above), begonias may wilt slightly in the afternoon. This is often a self-defense mechanism to conserve moisture. Check the soil; if it is still moist, the plant will likely perk back up as the temperature drops in the evening. Avoid the temptation to overwater a wilting plant if the soil is already wet.
What to do next:
- Monitor for animal tracks or nibbled leaves early in the season.
- Move pots to a sheltered spot during heavy thunderstorms.
- Add a thin layer of mulch to garden beds to help regulate soil temperature.
Maintaining a Neat Appearance
Begonias are largely "self-cleaning," which means they drop their old flowers on their own. This makes them a very low-maintenance choice for busy gardeners. However, a little bit of grooming can keep them looking even better.
Deadheading and Pruning
"Deadheading" is the process of removing spent blooms. While not strictly necessary for the plant's health, picking off the brown flowers keeps the plant looking tidy. For tuberous begonias, you might also remove the smaller female flowers to allow the plant to put more energy into the large, showy male flowers.
If your wax begonias or cane begonias start to look "leggy" or too tall, you can pinch back the tips of the stems. This encourages the plant to branch out, resulting in a bushier, fuller shape. Simply use your thumb and forefinger to snip off the top inch of the stem just above a leaf node.
Grooming Foliage
Occasionally, you may see a yellow or damaged leaf. This is normal as the plant grows and matures. Simply snip off the yellow leaf at the base of its stem. This improves air circulation around the center of the plant, which is great for preventing fungal issues.
Transitioning in the Fall
As summer draws to a close, you have a few choices for your begonias. Because they are tender perennials, they don't have to be treated as one-season annuals if you have a bit of indoor space.
Bringing Pots Indoors
If you have Rex or cane begonias in pots, you can bring them inside to live as houseplants for the winter. Do this before the nighttime temperatures drop below 50°F. Before bringing them in, check the leaves and soil for any hitchhiking insects. A quick rinse with a garden hose can help clean the foliage. Once inside, place them in a bright window and reduce your watering frequency, as they will grow more slowly in the lower light of winter.
Saving Begonia Tubers
Tuberous begonias can be saved for next year by storing the tubers. Once the foliage begins to yellow in the fall, or after the first very light frost, dig up the tubers.
- Cut the stems back to about an inch above the tuber.
- Gently brush off the excess soil.
- Let the tubers dry in a warm, shady spot for a few days until the surface feels dry.
- Store them in a box filled with peat moss, sawdust, or sand.
- Keep the box in a cool, dark, frost-free place (around 50°F) like a basement or closet.
In the spring, you can bring them back out, pot them up, and start the cycle all over again.
For a broader overview of seasonal care, read tips for growing tuberous begonias.
Creating Beautiful Combinations
Begonias play well with others. Their ability to thrive in shade makes them perfect partners for a variety of other foliage and flowering plants.
- For Foliage Contrast: Pair the bold leaves of Rex begonias with the fine, airy texture of ferns or the trailing vines of ivy.
- For Color Echoes: Plant pink wax begonias alongside silver-leaved plants like Dusty Miller. The silver makes the pink blooms pop.
- For Vertical Interest: In a large container, use an upright cane begonia as the center "thriller," surround it with coleus for "filler," and use trailing tuberous begonias as the "spiller" over the edges.
- Under Trees: Mass wax begonias around the base of a shade tree to create a bright circle of color in an otherwise dark area.
For a cascading container display, consider Begonia Hanging Pink Balcony.
Conclusion
Planting begonias outside is a rewarding way to bring vibrant color and lush textures to your porch, patio, and garden beds. By waiting for warm weather and choosing a spot with filtered light and good drainage, you set your plants up for a successful season. These versatile plants ask for very little—just consistent moisture and a bit of food—to provide a spectacular show that lasts until the frost.
Whether you choose the trailing elegance of tuberous varieties or the sturdy reliability of wax begonias, you can trust Longfield Gardens to help you grow a more beautiful landscape. Remember that gardening is a journey of observation; watch how your begonias respond to their new outdoor home, and they will reward you with beauty all summer long.
- Wait for consistent 50°F nights before planting.
- Provide dappled shade and protection from strong winds.
- Water when the top inch of soil feels dry.
- Feed every few weeks for the best bloom production.
"Begonias are the perfect bridge between the indoor and outdoor garden, offering a tropical flair that is surprisingly easy to maintain once you get the basics right."
FAQ
Can begonias grow in full sun?
Most begonias prefer partial or full shade, but wax begonias with bronze-colored foliage are quite sun-tolerant. In northern climates with milder sun, many varieties can handle more light, but in hot southern regions, they almost always require protection from the intense afternoon sun to avoid leaf scorch.
For more light-specific advice, see is begonia a shade plant.
How often should I water my outdoor begonias?
You should water your begonias whenever the top inch of soil feels dry to the touch. In the heat of summer, containers may need water every day or two, while begonias in the ground might only need it twice a week. Always check the soil moisture first, as overwatering can lead to root rot.
Do I need to cut off dead flowers?
Begonias are mostly self-cleaning and will drop their old flowers on their own. However, removing spent blooms and any yellowing leaves by hand will keep your plants looking tidy and can help improve air circulation. This prevents mold and keeps the plant focused on producing new growth.
Why are my begonia leaves turning yellow?
Yellow leaves are often a sign of too much water or poor drainage. If the soil is constantly wet, the roots cannot function properly. If your soil is dry and the leaves are yellowing, the plant might need a bit of fertilizer. Start by checking the moisture level and ensuring your pot has adequate drainage holes.
For additional troubleshooting, see ideal growing conditions for begonias.
