Polka Dot Begonia
Begonia maculata
Through the year 🗓️
🍂 Fall now
Taper feeding and let the top dry a little more between drinks as light fades.
❄️ Winter
Rest it: less water, no feed, and keep it warm and clear of cold drafts.
🌱 Spring
Repot, pinch back leggy canes to spark branching, and restart regular feeding.
☀️ Summer
Peak growth. Water steadily, feed every couple of weeks, and keep air moving around it.
The details
Light & placement
- Light
- Bright indirect; plenty of light keeps the silver dots bright and the cane sturdy, but direct midday sun bleaches and burns the leaves
- Ideal PPFD
- 150–300 µmol·m⁻²·s⁻¹
- Grow-light distance
- 14–20 in below LED
Water & feed
- Watering method
- Water when the top inch dries, aiming at the soil rather than the leaves, because wet foliage is an open invitation to powdery mildew. It would rather be a touch dry than soggy.
- Fertilizer
- Balanced feed at ½ strength every 2–4 wks in spring–summer; it's a hungry, fast grower.
Home & habit
- Soil
- Light, airy mix with perlite and a little bark; pH 5.8–6.5
- Humidity
- High (50–60%) but with good airflow; stagnant damp breeds mildew
- Temperature
- 65–80 °F; keep above 60 °F
- Mature size
- 2–4 ft tall cane
- Repotting
- Yearly in spring; it grows fast and gets top-heavy
- Propagation
- Almost too easy: a stem cutting with a node roots in a glass of water in a couple of weeks.
When something looks wrong
- Overwatering signs
- Yellowing leaves, mushy stems, soft blackening at the soil line
- Underwatering signs
- Drooping leaves and crisp brown edges; leaf drop if it dries out hard
- Common pests
- Mealybugs, spider mites, thrips; powdery mildew is the real threat
Common problems 🩺
The usual suspects when Polka Dot Begonia looks unhappy. Most houseplant trouble is watering or light, not disease — see all plant problems if you are not sure which plant is the culprit.
Crispy edges
Likely cause
Dry air. It wants humidity but hates wet leaves.
What to do
Raise humidity with a humidifier or pebble tray — do not mist the foliage.
Dropping leaves suddenly
Likely cause
A cold draft, or a swing between bone-dry and soaked.
What to do
Keep it warm, away from drafts, and water on a steady rhythm.
White powdery film or spotting
Likely cause
Powdery mildew from damp, still air.
What to do
Improve airflow, keep water off the leaves, and remove affected foliage.
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