Pocket Botanist
Check these first
- Smell the soil for a sour or rotten odor.
- Check if the soil remains wet for long periods.
- Examine the base of the trunk for soft or discolored bark.
Likely causes
Poor drainage
Most likelyHow to tell: The tree shows stunted growth and the foliage wilts despite wet soil. The roots may look dark or mushy when inspected.
What to do: Improve drainage by amending the soil with sand or gravel. Avoid overwatering and ensure the tree is not planted in a depression.
Overwatering
PossibleHow to tell: The soil stays wet for more than two weeks between waterings. The tree looks generally unhappy and weak.
What to do: Adjust your watering schedule to every 14 days for mature trees. Allow the top few inches of soil to dry out completely before adding more water.
Find out what's wrong with your coastal she oak
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
Root rot is often fatal if the entire root system is affected. If the tree is leaning or the bark is peeling at the base, it is likely too late.
Stopping it coming back
Plant in well draining soil and never water if the ground is already saturated.
Coastal she oak: root rot? Check yours with a photo
Every plant is a little different. Take a photo of your coastal she oak 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 tree with root rot?
- If caught early, you can improve drainage and reduce watering. If the damage is extensive, the tree will likely not recover.
- Does mulch cause root rot?
- Only if it is piled against the trunk. Keep mulch a few inches away from the bark to allow airflow.
More problems with Coastal she oak
Back to the Coastal she oak 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.