Begonia
Begonia spp.
A diverse genus of tropical, flowering perennials grown for ornamental foliage and blooms; includes wax, rex, cane and tuberous types for indoor and outdoor culture.
Caution: Toxic to Pets
Toxicity: mildly toxic
Many begonias contain soluble calcium oxalates. Chewing leaves can cause drooling, oral irritation, vomiting in pets; seek vet advice if ingested.
🌱Care Requirements
Light
Place begonias in bright, indirect light — an east- or north-facing window with morning sun or a few metres back from a south/west window. Avoid direct midday sun which scorches leaves; filtered light through sheer curtains is ideal.
Water
Water when the top 2–3 cm of soil is almost dry. Water thoroughly until excess drains, then empty the saucer. Reduce frequency in cooler months; avoid waterlogging which causes root rot and yellowing.
Humidity
Begonias prefer high humidity (50–70%). Use pebble trays, humidifiers, grouping with other plants, or bathroom placement. Avoid misting directly on textured leaves to prevent spots and fungus.
Temperature
Keep between 15–27 °C (59–81 °F). Avoid temperatures below 12–15 °C (54–59 °F) and sudden drafts; consistent warmth supports growth and flowering.
🔧Common Problems & Solutions
Yellowing lower leaves and soft crown
Cause: Overwatering or poorly draining soil leading to root rot
Solution: Improve drainage, repot into fresh mix, reduce watering frequency, trim rotten roots and let plant dry slightly before watering.
Brown crispy leaf edges
Cause: Low humidity, underwatering or salt buildup from fertilizer
Solution: Increase humidity, flush soil occasionally to remove salts, water more evenly and trim damaged edges.
Leggy growth and sparse foliage
Cause: Insufficient light
Solution: Move to brighter indirect light, pinch back stems to encourage bushier growth and consider light supplementation.
White cottony patches or sticky residue
Cause: Mealybugs, scale or aphids
Solution: Isolate plant, remove pests with alcohol swab or insecticidal soap, repeat treatments and inspect new plants before introducing.
✂️How to Propagate Begonia
Leaf cuttings: choose a healthy mature leaf, cut into sections including a main vein, place on moist, well-draining mix or insert petiole into mix, cover to retain humidity and keep bright indirect light; roots form in 3–6 weeks. Stem cuttings: take 5–10 cm tip cuttings, remove lower leaves, dip in rooting hormone, plant in sterile mix and keep warm and humid. Division: remove from pot, gently separate rhizomes or tubers and replant each section with roots and buds. Seeds: sow on surface of damp mix, keep warm and humid and expect variable germination.
🌍Origin & Background
Family: Begoniaceae
Native to: Tropical and subtropical regions of Central and South America, Africa and Asia.
Natural Habitat: Understory of moist forests and riverbanks where plants receive dappled light, high humidity, warm temperatures and rich, well-draining soils rich in organic matter.
🗓Seasonal Care Guide
Winter
Provide cooler, stable temps and less water; maintain humidity and bright indirect light. Stop fertilizing and avoid wet, cold conditions that encourage rot.
Spring
Increase watering and begin monthly feeding as new growth emerges. Repot if root-bound and pinch back to promote bushiness.
Summer
Ensure bright, indirect light and consistent watering; increase humidity. Watch for pests and provide air flow to reduce fungal issues.
Fall
Gradually reduce watering and feeding as growth slows. Move away from cold drafts and monitor for stress as daylight shortens.
❓Frequently Asked Questions
How often should I water my begonia?
Water when the top 2–3 cm of soil is dry, typically every 5–10 days depending on light and temperature.
Can begonias tolerate direct sunlight?
Most begonias dislike strong direct sun; use bright, filtered light to avoid leaf scorch.
Are begonias poisonous to pets?
Yes, many are mildly toxic due to calcium oxalates; ingestion can cause mouth and digestive irritation.
How do I make my begonia bushier?
Pinch or prune growing tips, provide bright indirect light and regular feeding during active growth.
Can I propagate begonias from a single leaf?
Yes — leaf cuttings are effective: place cut sections or whole leaves on moist mix and keep humid until plantlets form.
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Last updated: 11/7/2025