Can I save a plant with root rot?

If only a small portion of the roots are affected, you can prune the dead roots and replant in fresh, well draining soil. If the damage is extensive, it is best to remove the plant to prevent fungus spread.

How often should I water to prevent this?

Water every 7 to 14 days, but always check the soil first. If the top inch is still damp, wait a few more days.

Pontic rhododendron: root rot, causes and fixes

Check these first

Dig down near the base to see if the soil is waterlogged.
Gently pull back the soil to inspect the roots for a mushy texture.
Check if the plant is sitting in a low spot in the garden.

Likely causes

Phytophthora root rot
Most likely
How to tell: The leaves wilt, turn dull, and eventually brown while the roots become black and mushy. This thrives in heavy, waterlogged clay soils.
What to do: Improve drainage immediately by amending the soil with organic matter or moving the plant to a raised bed. Unfortunately, if the root system is mostly black, the plant may not recover.
Overwatering
Possible
How to tell: The soil stays constantly soggy and the plant shows signs of stress. The roots lack oxygen and begin to decay.
What to do: Allow the top inch of soil to dry out completely before watering again. Ensure your planting site has excellent drainage and is not in a low spot where water pools.

Root rot in other plants

Find out what's wrong with your pontic rhododendron

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

If the roots are soft, dark, and smell foul, the plant is likely beyond saving. Act immediately if you see wilting during cool, wet weather.

Stopping it coming back

Plant your rhododendron in well draining soil and avoid burying the root ball too deeply. Never let the plant sit in standing water.

Pontic rhododendron: root rot? Check yours with a photo

Every plant is a little different. Take a photo of your pontic rhododendron 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 plant with root rot?: If only a small portion of the roots are affected, you can prune the dead roots and replant in fresh, well draining soil. If the damage is extensive, it is best to remove the plant to prevent fungus spread.
How often should I water to prevent this?: Water every 7 to 14 days, but always check the soil first. If the top inch is still damp, wait a few more days.

Guides to these causes

Root Rot

Why is my Pontic rhododendron wilting and dying?