Begonia Maculata Care Guide
Begonia maculata, commonly called the polka dot begonia or trout begonia, is a cane-type species native to Brazil. It produces tall, upright, bamboo-like stems with large, asymmetric leaves in deep olive green covered with precisely spaced white or silver spots on the upper surface and vivid scarlet or deep red on the underside. The combination of the spotted upper surface and the red reverse makes it one of the most visually striking begonias in common cultivation. In good light it produces clusters of pale pink or white flowers at the stem tips. It grows quickly and can reach 90 centimeters to 1.2 meters without pruning.
Quick Reference
| Factor | Requirement |
|---|---|
| Light | Bright indirect light; some morning sun beneficial |
| Water | Allow top 1 to 2 cm to dry; water at base |
| Humidity | 50 to 60 percent |
| Temperature | 18 to 27 degrees Celsius |
| Soil | Well-draining, moisture-retentive mix |
| Fertilizer | Balanced liquid fertilizer monthly, spring through early autumn |
| Pot | Container with drainage holes |
| Toxicity | Toxic to cats and dogs |
Light
Bright indirect light with access to some morning sun produces the best spotting contrast and supports flowering. The white spots on the leaf surface reflect light and appear most vivid in good light conditions. In lower light, the spots become less distinct and growth becomes leggy as the plant reaches toward the light source. Position close to a bright east or west-facing window.
Watering and Humidity
Water at the base of the plant when the top one to two centimeters of mix are dry. Begonia maculata has large, thin leaves that lose water quickly in warm, dry conditions but is susceptible to stem and root rot if consistently overwatered. A well-draining mix with perlite added prevents waterlogging. Humidity at 50 to 60 percent reduces the risk of leaf edge browning and the powdery mildew to which cane begonias are prone. Do not mist the foliage.
Pruning
Begonia maculata is prone to legginess: without pruning, the main stems grow tall and bare at the base, with all the foliage concentrated at the top. Prune back to a node in early spring to encourage branching from lower on the stem. The plant responds vigorously to pruning, producing multiple new shoots from each cut. Stem cuttings taken during pruning root quickly in water or moist perlite, making pruning a natural opportunity to propagate. The technique is covered in the how to propagate begonias guide.
For drooping leaves or wilting, the begonia leaves drooping or wilting guide covers the causes and corrective steps.