dropping leaves on Begonia
Quick answer
If your Begonia has dropping leaves, the most likely cause is: Begonias drop leaves through two distinct mechanisms. OVERWATERING: Rhizomatous and fibrous begonia roots suffocate in waterlogged soil within 7-10 days, triggering ethylene-mediated leaf abscission as the plant redirects resources from compromised tissue. TRANSPLANT SHOCK: Begonias exhibit extreme sensitivity to environmental changes; ethylene burst from repotting or relocation causes rapid shedding of juvenile 'baby leaves' within 24-72 hours. Both present similarly but require opposite interventions.
Start here:
- 1. Diagnostic soil test: Insert finger 2-3 inches deep; moist/wet soil with leaf drop indicates overwatering; dry soil suggests underwatering or shock
- 2. Root inspection: Gently unpot and examine roots—slimy black roots confirm overwatering requiring repotting in fresh chunky mix; intact white roots indicate shock
Why Begonia gets dropping leaves
Begonia spp.
Begonias drop leaves through two distinct mechanisms. OVERWATERING: Rhizomatous and fibrous begonia roots suffocate in waterlogged soil within 7-10 days, triggering ethylene-mediated leaf abscission as the plant redirects resources from compromised tissue. TRANSPLANT SHOCK: Begonias exhibit extreme sensitivity to environmental changes; ethylene burst from repotting or relocation causes rapid shedding of juvenile 'baby leaves' within 24-72 hours. Both present similarly but require opposite interventions.
How to reverse dropping leaves on Begonia
- 1
Diagnostic soil test: Insert finger 2-3 inches deep; moist/wet soil with leaf drop indicates overwatering; dry soil suggests underwatering or shock
- 2
Root inspection: Gently unpot and examine roots—slimy black roots confirm overwatering requiring repotting in fresh chunky mix; intact white roots indicate shock
- 3
For overwatering: Trim rotted roots with sterile shears; repot in 50% peat, 30% perlite, 20% bark mix; withhold water 7-10 days minimum
- 4
For shock: Maintain stable environment 65-75°F with 50-60% humidity; avoid any changes for 4 weeks; expect recovery in 2-4 weeks
- 5
Light verification: Ensure bright indirect light 1500-2500 lux; low light exacerbates both conditions by reducing metabolic recovery capacity
Keep dropping leaves off this Begonia
Use well-draining soil with 40% minimum perlite/bark; allow top 2 inches to dry completely between waterings; avoid repotting unless rootbound; acclimate new plants gradually over 14 days; maintain consistent environment without frequent relocation