Can I save a tree with root rot?

If caught very early, you can save it by fixing the drainage and letting the soil dry out. If the roots are already black and mushy, the tree usually cannot be saved.

How often should I water a mature spruce?

Once established, a Norway spruce is quite hardy. Only water it during extended periods of drought, roughly every 14 days.

Norway spruce: root rot, causes and fixes

Check these first

Feel the soil around the base to see if it is waterlogged.
Check if the tree is planted in a low spot where water pools.
Look for a foul smell coming from the soil.

Likely causes

Poor soil drainage
Most likely
How to tell: The needles turn yellow or brown and the tree looks wilted even when the soil is wet. The roots will appear mushy or dark instead of firm and light colored.
What to do: Stop watering immediately and allow the soil to dry out. If the soil is heavy clay, you may need to amend the surrounding area with organic matter or improve the grade to divert water away from the trunk.
Phytophthora root rot
Possible
How to tell: This is a soil borne disease that causes the tree to decline rapidly. You might see a dark, sunken area on the bark near the soil line.
What to do: There is no cure for this once it is advanced. Remove the tree and do not plant another spruce in that same spot for several years.

Root rot in other plants

Find out what's wrong with your norway spruce

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.

When to worry

It is serious if the tree is losing needles rapidly and the trunk base feels soft. A tree that is just settling in after being moved might show slight wilting, but it should recover with consistent, moderate watering.

Stopping it coming back

Ensure the tree is planted slightly above the soil line to prevent water from sitting against the trunk. Only water when the top 2 to 3 inches of soil feel dry.

Norway spruce: root rot? Check yours with a photo

Every plant is a little different. Take a photo of your norway spruce 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 very early, you can save it by fixing the drainage and letting the soil dry out. If the roots are already black and mushy, the tree usually cannot be saved.
How often should I water a mature spruce?: Once established, a Norway spruce is quite hardy. Only water it during extended periods of drought, roughly every 14 days.

Guides to these causes

Root Rot

Is my Norway spruce suffering from root rot?

Check these first

Not sure what's wrong with your norway spruce?