Skip to content
Pocket Botanist
Get the app

Mulberry · Morus

Why is my mulberry tree showing signs of root rot?

It is less common for a mulberry tree to suffer from root rot, as these trees are quite hardy, but it usually happens when the soil stays soggy for too long. Check the soil drainage around the base of your tree first to see if water is pooling after rain.

root rot on a plant
Photo: Ninjatacoshell, CC BY-SA 3.0

Check these first

  1. Feel the soil moisture level several inches deep near the trunk.
  2. Observe if water pools around the base of the tree after a rain.
  3. Inspect the base of the trunk for soft or discolored bark.

Likely causes

  1. Poor soil drainage

    Most likely

    How to tell: The ground around the trunk remains muddy or swampy for days after a rainstorm. You might notice the leaves yellowing or dropping prematurely.

    What to do: Improve the soil structure by adding organic matter like compost to help water move away from the roots. If the tree is in a low spot, consider creating a slight mound to elevate the root crown.

  2. Overwatering

    Possible

    How to tell: The soil feels constantly wet to the touch even when it has not rained recently. The tree may look wilted even though the ground is saturated.

    What to do: Adjust your watering schedule to every 14 days during dry spells instead of more frequently. Ensure you are watering deeply at the drip line rather than right against the trunk.

Find out what's wrong with your mulberry

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.

Download on the App StoreGet it on Google Play

When to worry

If the tree shows significant branch dieback or the bark near the soil line is mushy, the damage may be severe. It is normal for a few older leaves to yellow and drop during the heat of late summer.

Stopping it coming back

Plant your mulberry in well draining soil and avoid piling mulch directly against the trunk.

Keep your mulberry healthy from here

Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked. Identification and a health check are free.

Download on the App StoreGet it on Google Play

Get the app · Or check it from a photo now, free

Questions people ask

Can I save a mulberry tree with root rot?
If caught early, you can save it by improving drainage and reducing water. If the rot has reached the main trunk, the tree is likely beyond recovery.
How deep should I water my mulberry?
Water deeply enough to reach 12 to 18 inches into the soil. This encourages deep roots that are more resistant to surface moisture issues.

More problems with Mulberry

Back to the Mulberry guide

This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.