Plant Problem Lab
Monstera profile

Plant + symptom guide

Monstera root rot

Root rot is more likely when decline comes with wet soil, sour smell, mushy roots, soft stems, or a sealed pot. It is worth checking carefully before repotting.

For monstera, read this symptom alongside how the plant usually behaves: Monsteras usually need bright indirect light, an airy mix, and careful watering. Yellow leaves often come from wet soil, low light, dense mix, or pests on new growth.

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Possible causes

overwateringno drainagedense soillow light plus slow dryingoverwatering or slow-drying soillow light slowing growth and water use

What to check

Smell the soil and look for sour or swampy odor.

Slide the root ball out only if decline is severe or the pot has no drainage.

Check for brown, mushy roots versus firm pale roots.

Check whether the mix is chunky or compacted around the roots.

Inspect unfurling leaves and undersides for thrips or mites.

Evergreen diagnosis

Monstera root rot is usually a dense-mix problem

Monstera roots need air as much as water. Root rot often develops when a large aroid is kept in compact soil, a pot without good drainage, or a dim spot where the root ball stays damp for too long.

The top of the plant may show yellow leaves, limp petioles, black spots, or stalled new growth. The pot may also feel heavy several days after watering.

Look for sour, compacted soil around the center

A monstera can have healthy-looking roots near the pot edge while the center remains dense and wet. That middle section is where sour smell and mushy roots often appear.

Remove rotten roots and replace compacted mix with an airy blend that includes bark or other coarse material. Do not upsize the pot unless the healthy root system truly needs the space.

Aerial roots do not cancel root rot

Aerial roots can help a monstera climb, but they do not make a rotten pot safe. If the soil roots are failing, the plant still needs a better root zone.

Keep light bright and indirect after repotting, and wait for the mix to dry partly before watering. New firm growth is a better recovery sign than old yellow leaves.

Careful next steps for Monstera

  1. Step 1

    Isolate the plant if rot is severe or pests are also present.

  2. Step 2

    Trim dead roots and repot into a faster-draining mix if roots are mushy.

  3. Step 3

    Do not fertilize while roots are recovering.

Related symptoms

Other Monstera symptoms to check

Monstera yellow leavesYellow leaves make more sense when you check which leaves changed, how wet the soil is, light level, drainage, and recent care changes.Open guideMonstera brown spotsBrown spots need texture and location checks. Dry window-facing spots, soft spreading lesions, and pest speckling point to different next steps.Open guideMonstera leggy growthLeggy growth usually means the plant is reaching for more usable light. Fertilizer rarely fixes stretched growth without a brighter placement.Open guideMonstera thripsThrips on monstera usually show first on tender new leaves: silvery scuffs, black specks, distorted unfurling growth, or yellow patches that do not line up with watering alone.Open guideMonstera spotsSpots on monstera need a location check. Window-facing tan marks, pest speckling on new growth, and spreading wet-looking patches point to different fixes.Open guide

Useful reading

Read next for this problem

Overwatered Plant Signs plant symptom example
Watering Problems7 min read

Overwatered Plant Signs

An overwatered plant often looks thirsty. Wet soil, yellow lower leaves, drooping, fungus gnats, and soft stems are stronger clues than one symptom alone.

Read the guide