How to Identify Root Rot: Signs, Symptoms & What to Look For

Root rot is a silent killer — by the time you notice something is wrong above the soil, the damage below is often already severe. Knowing how to identify root rot early gives your plant the best chance of recovery. Here's exactly what to look for.

Above-Soil Warning Signs

These symptoms don't confirm root rot on their own, but they're strong indicators that something is wrong at the root level:

• Wilting despite wet soil — the most telling sign. If your plant looks thirsty but the soil is damp, the roots may be too damaged to absorb water.
• Yellowing leaves — especially lower leaves turning yellow and soft, not crispy
• Mushy or soft stems at the base of the plant
• Rapid leaf drop — the plant is shedding leaves faster than normal
• Foul or sour smell coming from the soil — a sign of anaerobic bacterial activity from waterlogged conditions
• Mold or fungus growing on the soil surface
• Overall decline despite good light and regular care

Below-Soil Confirmation

The only way to definitively confirm root rot is to unpot the plant and inspect the roots directly.

Healthy Roots Look Like:

• White or light tan in color
• Firm and slightly flexible
• Clean-smelling

Root Rot Looks Like:

• Brown or black roots — the most obvious sign
• Mushy or slimy texture — healthy roots are firm; rotted roots fall apart when touched
• Foul smell — rotted roots have a distinct unpleasant odor
• Roots that slide off their outer sheath when touched — the outer layer peels away, leaving a thin wire-like strand

How to Check for Root Rot

1. Gently remove the plant from its pot
2. Shake off excess soil from the root ball
3. Examine the roots closely — look at color, texture, and smell
4. Healthy roots are white and firm; rotted roots are brown, black, or mushy
5. Note what percentage of the roots are affected — this determines whether the plant can be saved

Can the Plant Be Saved?

• Less than 50% of roots affected: Good chance of recovery with treatment
• 50-75% affected: Possible to save with aggressive treatment, but uncertain
• More than 75% affected or stem is mushy: Very difficult to save — consider taking stem cuttings to propagate

What to Do Next

If you've confirmed root rot, act immediately. Trim all brown and mushy roots with sterilized scissors, treat with diluted hydrogen peroxide, repot in fresh well-draining soil, and adjust your watering habits going forward. See our full root rot treatment guide for step-by-step instructions.