Pocket Botanist
Check these first
- Feel the soil 2 inches deep to see if it is waterlogged.
- Check if the tree is planted in a low spot where water pools.
- Look for a musty or rotten smell near the base of the trunk.
Likely causes
Poor soil drainage
Most likelyHow to tell: The soil stays soggy long after watering, and the base of the tree may smell musty. The foliage turns brown starting from the inside out or from the bottom up.
What to do: Stop watering immediately and let the soil dry out. If the area stays wet, you may need to amend the soil with organic matter or install a drainage system to move water away from the roots.
Overwatering
PossibleHow to tell: The tree is watered too frequently, leaving no time for the roots to breathe. The needles become limp before turning brown and brittle.
What to do: Stick to a schedule of watering every 7 to 14 days. Always check the top 2 inches of soil with your finger before adding more water.
Find out what's wrong with your northern white 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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
When to worry
If the browning is widespread and the branches are brittle, the root system may be too damaged to recover. Minor browning on the interior of the tree in autumn is normal shedding.
Stopping it coming back
Ensure your cedar is planted in well-draining soil. Avoid planting in areas where water collects after rain.
Northern white cedar: root rot? Check yours with a photo
Every plant is a little different. Take a photo of your northern white 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.
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 save it by correcting the drainage and stopping the excess water. If the roots are black and mushy, the tree likely cannot be saved.
- How do I know if I am watering too much?
- If the soil is consistently muddy or wet to the touch, you are watering too often. Allow the top layer to dry out slightly between waterings.
More problems with Northern white cedar
Back to the Northern white 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.