Pocket Botanist
Check these first
- Smell the soil near the base for a foul, rotten odor.
- Check if the ground around the tree stays muddy for days after rain.
- Look for yellowing needles that start from the bottom of the tree.
Likely causes
Poor drainage
Most likelyHow to tell: The needles turn yellow or brown, and the tree may appear to wilt even when the soil is wet. The base of the trunk might feel soft or spongy.
What to do: Improve soil drainage by amending the surrounding area with organic matter or installing a drainage pipe. Avoid watering until the top 2 inches of soil are dry.
Overwatering
PossibleHow to tell: The tree shows signs of decline despite regular care. The soil remains perpetually wet and may emit a sour or musty smell.
What to do: Adjust your watering schedule to every 10 to 14 days depending on rainfall. Ensure the root zone is damp but never waterlogged.
Find out what's wrong with your western red cedar
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.
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When to worry
Root rot is often fatal if the root system is already severely decayed. If the trunk base is soft and the foliage is mostly brown, the tree may not recover.
Stopping it coming back
Plant your cedar in well-draining soil and avoid over-mulching against the trunk, which traps excess moisture.
Western Red Cedar: root rot? Check yours with a photo
Every plant is a little different. Take a photo of your western red cedar 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.
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Questions people ask
- Can I save a tree with root rot?
- If caught early, you can save it by improving drainage and reducing water. If the rot has reached the trunk, the tree is likely beyond help.
- How often should I water to prevent rot?
- Water every 7 to 14 days, but always check the soil first. If it is still damp, skip the watering until it dries out slightly.
More problems with Western Red Cedar
- Why are my Western Red Cedar tips turning brown?
- Why are my Western Red Cedar needles turning yellow?
- Why is my Western Red Cedar losing needles?
- How do I get rid of bugs on my Western Red Cedar?
- Why is my Western Red Cedar drooping?
- Why are there spots on my Western Red Cedar?
- Why is my Western Red Cedar looking leggy?
Back to the Western Red Cedar 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.