Begonia maculata, the Polka Dot Begonia, is a striking cane begonia with olive, silver-spotted angel-wing leaves and deep red undersides, best used as a bold young accent before it outgrows a small build.
Light
Bright, indirect light keeps the spots crisp and the plant compact; direct sun burns the leaves and deep shade dulls the markings.
Water & humidity
Water when the top few centimetres of substrate feel dry. Begonias are prone to rot, so avoid soggy soil and keep water off the foliage.
In the terrarium
It loves humidity but grows tall for a terrarium plant, so use it as a young feature and expect to prune or rehome it as it matures. Good airflow is essential to prevent powdery mildew.
Origin & temperature
Begonia maculata is native to Brazil, growing on the shaded, humid forest floor and lower trunks of the Atlantic forest.
Temperature: 18–27 °C. Pet safety: begonias are toxic to cats and dogs, especially the underground parts.
Propagation
Easy from stem cuttings with a node, rooted in water or damp substrate under humidity.
Common problems
- White powdery film = mildew from stagnant humid air; improve ventilation.
- Dropping leaves = overwatering or a cold draught; ease off water and keep it warm.
Good companions
Polka Dot Begonia pairs well with plants that want the same conditions, a humid, closed terrarium with bright, indirect light. Here are some species that thrive alongside it:
→ Explore more matches with our Plant Pairing Tool.
Frequently asked questions
Does Polka Dot Begonia stay small enough for a terrarium?
Only while young, it's a cane begonia that can reach well over 30 cm, so use it as a temporary feature or in a large build and prune it hard.
Why does my Begonia maculata get mildew?
Humid, still air. Begonias need good airflow in a terrarium; vent the vessel and don't let water sit on the leaves.
Care information is a general guide; conditions vary. Some links on this site are affiliate links that help support Terrarium Creations.