Dropping Leaves on begonia maculata
What's Happening
Begonia maculata (Polka Dot Begonia) dropping leaves results from overwatering in moisture-retentive peat-heavy soil combined with shallow root systems intolerant of waterlogged conditions. The plant's epiphytic adaptations require oxygen-rich root environments; when soil remains saturated for 3-5 days, anaerobic bacteria proliferate, triggering root rot and leaf abscission as a survival mechanism to conserve energy.
How to Fix It
- 1
Repot immediately from peat-heavy mixes into well-draining aroid-style mix (40% potting soil, 30% perlite, 20% orchid bark, 10% charcoal)
- 2
Allow soil to dry completely between waterings; use finger test to 2nd knuckle before adding water
- 3
Trim any black, mushy roots during repotting using sterilized shears; treat cut surfaces with cinnamon powder
- 4
Switch to bottom-watering: Place pot in shallow water for 20-30 minutes, then drain thoroughly to prevent standing water
- 5
Maintain consistent bright indirect light (1000-2000 lux) to support transpiration and prevent moisture stagnation
How to Prevent It
Water only when top 2 inches of soil are completely dry; use well-draining mix with 40% perlite or orchid bark; repot every 12-18 months to prevent soil compaction; maintain 50-60% ambient humidity without saturating soil.