Polka dot begonia care guide
Begonia maculata
Also known as: Spotted begonia, Cane begonia
Pets and children
Considered toxic
The stems and roots contain oxalates: dogs and cats that eat them can vomit, drool and have a sore mouth, so keep it out of reach and contact a veterinarian (or a doctor, for a child) if eaten.
How often to water Polka dot begonia
- Spring–Summer (Mar–Sep)
- Every 4 days
- Water well at the base once the topsoil dries, as a guide; letting the whole pot dry out drops the lower leaves.
- Autumn (Oct–Nov)
- Every 6 days
- Water about a day or two after the topsoil dries.
- Winter (Dec–Feb)
- Every 10 days
- Water sparingly about three to four days after the soil dries.
Light and placement for Polka dot begonia
A bright spot behind a sheer curtain is generally best; too little light stretches the canes and fades the spots, direct sun scorches the leaves, and it likes moving air.
Overwintering Polka dot begonia
Overwintering guide: 10°C (50°F) or above
Overwinter it in a room that stays above about 10°C, away from cold windowpanes and heater draft, with sparing watering; lower leaves may drop, and a spring trim brings new growth.
Fertilizing and repotting Polka dot begonia
Fertilizer
Diluted liquid feed about every two weeks from May to September, easing off during midsummer heat and stopping in winter.
When to repot
Spring–Summer (Mar–Sep)
Common problems with Polka dot begonia
- Short of light the canes grow tall and thin and the lower leaves drop, leaving a bare plant.
- Overwatering blackens and rots the base of the canes.
- Poor airflow brings powdery mildew that whitens the leaves.
Tips for growing Polka dot begonia
- Cutting overlong canes just above a node in spring makes side shoots and a fuller plant.
- The cut canes root in water, so it is easy to propagate.
- Stake tall canes so they do not topple.
These are AI-generated general guidelines. They vary with the variety, the placement and the pot size. For effects on pets or children, consult a veterinarian or a doctor.
Keep your plant log going
Greenery is a free app that keeps your plant care going, with watering reminders and photo records. Available on iOS and Android.
