Check these first
- Check if the pot has drainage holes.
- Smell the soil for a sour or rotten odor.
- Gently lift the plant to see if the roots are firm and white or mushy and brown.
Likely causes
Overwatering
Most likelyHow to tell: The stems turn mushy or black at the base and the leaves start to drop off.
What to do: Stop watering immediately and let the soil dry out completely. If the damage is severe, repot the plant into fresh, well draining soil after trimming away any black, slimy roots.
Poor Drainage
Most likelyHow to tell: Water sits on the surface of the soil for a long time after watering.
What to do: Ensure your pot has holes at the bottom for excess water to escape. Use a potting mix specifically designed for containers to improve aeration.
Find out what's wrong with your wax begonia
The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
When to worry
If the stems are turning black and mushy at the base, the plant is in serious trouble. It is normal for a few lower leaves to drop as the plant matures.
Stopping it coming back
Always empty the saucer under your pot after watering so the plant never sits in standing water.
Wax Begonia: root rot? Check yours with a photo
Every plant is a little different. Take a photo of your wax begonia and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Can I save a plant with root rot?
- If you catch it early and remove the damaged roots, you can often save the plant. If the entire root system is mushy, it is usually too late.
- How often should I water to avoid rot?
- Water every 3 to 7 days, but only when the top inch of soil feels dry.
More problems with Wax Begonia
- Why are my wax begonia leaves turning yellow?
- Why is my wax begonia getting so leggy?
- Why are there spots on my wax begonia leaves?
- Why is my Wax Begonia drooping?
- Why are my Wax Begonia's leaf tips turning brown?
- Why is my wax begonia dropping its leaves?
- Why is my wax begonia not blooming?
- How do I get rid of bugs on my wax begonia?
- Why are my wax begonia leaves curling?
This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.

