Pocket Botanist
Check these first
- Smell the soil for a musty or rotten odor.
- Lift the plant to see if the tuber feels soft or squishy.
- Verify that the pot has functional drainage holes.
Likely causes
Overwatering
Most likelyHow to tell: The stems become soft or mushy at the base and the soil smells sour or swampy.
What to do: Remove the plant from its pot and trim away any black, slimy roots. Repot the tuber in fresh, well draining soil and wait a few days before watering lightly.
Poor Drainage
Most likelyHow to tell: Water pools on the surface of the soil for a long time after watering.
What to do: Ensure your pot has large drainage holes at the bottom. Use a potting mix amended with perlite or grit to improve airflow around the tuber.
Find out what's wrong with your black bryony
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 entire tuber feels soft to the touch, the plant is likely beyond saving. If only a few roots are affected, you can often rescue it with prompt repotting.
Stopping it coming back
Always empty the saucer under your pot after watering so the plant never sits in standing water.
Black Bryony: root rot? Check yours with a photo
Every plant is a little different. Take a photo of your black bryony 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 mushy tuber?
- If the rot has reached the main tuber, it is very difficult to save. If only the fine feeder roots are affected, you have a good chance of recovery.
- How often should I water to avoid this?
- Water every 5 to 10 days, but always check the soil moisture first. If the soil still feels damp, wait a few more days.
More problems with Black Bryony
- Why are there spots on my Black Bryony leaves?
- Why is my Black Bryony losing its leaves?
- Why are my Black Bryony leaves turning yellow?
- Why is my Black Bryony drooping?
- Why are the tips of my Black Bryony leaves turning brown?
- Why are there bugs on my Black Bryony?
- Why is my Black Bryony growing so long and thin?
Back to the Black Bryony guide
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.