Begonias are among the most rewarding flowering plants you can grow, prized for their colorful blooms, dramatic foliage, and willingness to thrive in shadier spots where many other flowers struggle. Whether you want a tidy bed of bedding begonias, a hanging basket dripping with tuberous blooms, or a showpiece rex begonia with metallic, swirled leaves, there is a begonia for nearly every garden and windowsill. This guide walks you through the main types, light and watering needs, soil, feeding, propagation, and the handful of common problems to watch for.
Begonia quick care
- Light: bright indirect / part shade
- Water: keep lightly moist
- Soil: light, well-drained
- USDA zones: 9-11 (tender)
- Bloom: spring-fall
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The main types of begonia
Begonia is a huge genus with well over 1,000 species and countless hybrids, but for home growers they fall into four practical groups. Knowing which type you have makes every care decision easier, because their watering, light, and dormancy needs differ.
Wax (fibrous) begonias
Wax begonias (Begonia semperflorens), also called fibrous begonias, are the compact bedding plants you see massed in summer borders. They have glossy green or bronze leaves, near-constant clusters of small white, pink, or red flowers, and a forgiving, drought-tolerant nature. They are the easiest begonias for beginners and the most tolerant of direct morning sun.
Tuberous begonias
Tuberous begonias grow from a fleshy tuber and produce the largest, showiest flowers of all, in vivid shades of orange, yellow, red, and white. Many are pendulous, making them ideal for hanging baskets. They go dormant in winter, and the tubers can be lifted and stored to grow again the following year. You can buy dormant begonia tubers in late winter and start them indoors.
Rex begonias
Rex begonias are grown for their spectacular foliage rather than their flowers. Leaves come in swirls of silver, purple, green, pink, and red with metallic sheens and dramatic texture. They are rhizomatous, prefer higher humidity, and make excellent houseplants in bright indirect light.
Cane and angel-wing begonias
Cane begonias, including the popular angel-wing types, grow upright on bamboo-like, jointed stems and can reach impressive heights indoors. Their wing-shaped leaves are often spotted silver, and they bloom in pendulous clusters. They are robust, long-lived, and a favorite for indoor growing.
Light requirements
Most begonias want bright, indirect light or dappled part shade. Too little light produces leggy growth and few flowers; too much harsh midday sun scorches the leaves, especially on rex and tuberous types. Match the light to the type for best results.
- Wax begonias: tolerate the most sun, including morning direct sun; bronze-leaved varieties handle more than green-leaved.
- Tuberous: bright shade or filtered light; protect from hot afternoon sun.
- Rex: bright indirect light only; direct sun fades and burns the foliage.
- Cane/angel-wing: bright indirect light indoors; a few hours of gentle sun encourages flowering.
Watering and humidity
Begonias like to be kept lightly and evenly moist but never waterlogged. Their fleshy stems and roots rot quickly in soggy soil, so the goal is consistent moisture with good drainage. Water when the top inch of soil feels dry, then let excess drain away completely.
Keep the leaves dry
This is the single most important watering rule for begonias: water the soil, not the foliage. Wet leaves invite powdery mildew, botrytis, and bacterial leaf spot. Water at the base in the morning so any splashes dry quickly, and avoid overhead watering or misting directly onto the leaves.
Raising humidity
Rex and cane begonias appreciate humidity of 50% or more. Instead of misting the leaves, raise ambient humidity with a pebble tray, by grouping plants together, or with a small humidifier nearby. Good air circulation alongside the higher humidity keeps fungal disease at bay.
Soil and feeding
Begonias need a light, airy, well-draining medium that holds some moisture without becoming dense or soggy. A quality well-draining potting mix amended with extra perlite or orchid bark works well. Many growers use a mix close to that for African violets, which suits begonias’ similar preferences.
- Always use containers with drainage holes.
- Aim for a slightly acidic to neutral pH (around 5.5-6.5).
- Avoid heavy garden soil in pots; it compacts and holds too much water.
Feed actively growing begonias every two to four weeks during spring and summer with a diluted balanced fertilizer, using it at half the labeled strength. Flowering types appreciate a bloom-boosting formula higher in phosphorus once buds form. Stop feeding in fall and winter when growth slows or the plant goes dormant.
Growing indoors vs outdoors and in containers
Indoors
Rex and cane begonias make superb houseplants. Give them a bright east- or north-facing window, steady warmth above 60°F (15°C), and protection from cold drafts and heating vents. They pair beautifully with other shade-loving houseplants, and if you enjoy indoor growing you may also like our guide to growing herbs indoors.
Outdoors and in containers
Outdoors, begonias are tender perennials hardy only in USDA zones 9-11; everywhere colder they are grown as annuals or brought inside before frost. They excel in containers, window boxes, and hanging baskets where you can control soil and drainage. Wax begonias are reliable bedding plants, while pendulous tuberous types spill gracefully from baskets. Wait until all danger of frost has passed and nights stay above 50°F (10°C) before moving them outside.
Begonias in tropical Singapore
Singapore gardeners have a real advantage: the warm, humid, frost-free climate suits begonias year-round, so there is no overwintering to worry about. Grow them in bright shade under a balcony or beneath taller plants, out of the direct equatorial midday sun, and make sure pots drain freely during heavy monsoon rains. The naturally high humidity keeps rex and cane begonias looking lush, though good airflow remains essential to prevent mildew.
Overwintering tuberous begonias
In cold climates, tuberous begonias can be saved over winter rather than discarded. As days shorten in fall, the plants naturally begin to die back, which is your cue to begin the process.
- Stop watering and feeding when foliage starts to yellow.
- After the first light frost (or once stems detach easily), lift the tubers.
- Cut back the stems and brush off loose soil; let the tubers cure in a dry, airy spot for a week or two.
- Store the dry tubers in peat, vermiculite, or dry sand in a cool, dark, frost-free place around 45-50°F (7-10°C).
- In late winter or early spring, replant in fresh mix, hollow side up, and start them into growth indoors.
Propagation from cuttings and leaves
Begonias are easy and fun to propagate, and most types root readily in spring and summer. Choose your method based on the begonia you have.
- Stem cuttings: best for cane, angel-wing, and wax begonias. Snip a healthy 3-4 inch tip, remove the lower leaves, and root in moist mix or water.
- Leaf cuttings: ideal for rex and other rhizomatous types. Lay a leaf flat, nick the main veins, and pin it onto moist mix; new plantlets form at the cuts. Alternatively, set leaf-and-stalk cuttings into soil.
- Rhizome and tuber division: split established rhizomes or tubers, making sure each piece has a growth point or eye.
Keep cuttings warm, humid, and out of direct sun while they root, which usually takes three to six weeks. If you enjoy propagating tender flowering plants, you may also like our fuchsia care guide, which covers similar cutting techniques.
Common problems and how to fix them
Powdery mildew
A white, powdery coating on leaves signals powdery mildew, encouraged by poor airflow, crowding, and wet foliage. Improve air circulation, remove affected leaves, avoid wetting the foliage, and treat with a fungicide or a diluted potassium bicarbonate spray if it spreads.
Root rot
Yellowing leaves, mushy stems, and wilting despite moist soil usually mean root rot from overwatering or poor drainage. Let the soil dry out more between waterings, repot into fresh well-draining mix if it is severe, and always use pots with drainage holes.
Other issues
- Botrytis (gray mold): fuzzy gray growth in damp, cool, still air; remove affected parts and increase airflow.
- Bud drop: often caused by sudden changes in light, temperature, or watering; keep conditions steady.
- Pests: watch for mealybugs, spider mites, and whiteflies, treating with insecticidal soap.
- Leggy growth: a sign of too little light; move to a brighter spot and pinch to encourage bushiness.
With the right light, careful watering at the base, and a free-draining mix, begonias reward you with months of color and striking foliage. For more flower and houseplant projects, browse our full plant & flower care guide.
Frequently asked questions
Do begonias need full sun or shade?
Most begonias prefer bright indirect light or part shade. Wax begonias tolerate some morning sun, but rex and tuberous types scorch in hot direct sun, so dappled or filtered light is best.
Why are my begonia leaves getting white powder on them?
That is powdery mildew, a fungal disease encouraged by wet leaves and poor airflow. Water at the soil line instead of overhead, space plants for better circulation, remove affected leaves, and treat with a suitable fungicide if needed.
How often should I water a begonia?
Keep the soil lightly and evenly moist, watering when the top inch feels dry. Avoid letting it stay soggy, and always water the base rather than the foliage to prevent disease and root rot.
Can I save tuberous begonias over winter?
Yes. Once foliage dies back in fall, lift the tubers, cure them dry for a week or two, and store them in peat or sand in a cool, dark, frost-free place around 45-50°F. Replant in spring.
Do begonias grow well in Singapore?
They do. Singapore’s warm, humid, frost-free climate suits begonias year-round. Grow them in bright shade out of harsh midday sun, ensure pots drain well during heavy rain, and keep airflow good to avoid mildew.