Bry.Rip Plant Guide
Root Rot — photo 1
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Root Rot 🦠

Serious Disease also: root and stem rot, overwatering

Affects these houseplants: African VioletAlocasia PollyAloe VeraAnthuriumAreca PalmBaby Rubber PlantBird of ParadiseBird's Nest FernBoston FernCast Iron PlantCebu Blue PothosChinese EvergreenChinese Money PlantChristmas CactusCorn PlantCrotonDieffenbachiaDracaena MarginataFiddle-Leaf FigHeartleaf PhilodendronHoya CarnosaJade PlantLucky BambooMajesty PalmMarble Queen PothosMoney TreeMonsteraMonstera AdansoniiNeon PothosNerve PlantParlor PalmPeace LilyPhalaenopsis OrchidPhilodendron BirkinPhilodendron BrasilPhilodendron MicansPolka Dot PlantPonytail PalmPothosPrayer PlantRattlesnake PlantRubber PlantSatin PothosScheffleraSnake PlantSpider PlantString of PearlsStromanthe TriostarSyngoniumTradescantia ZebrinaYucca CaneZZ Plant

Photo to source (Wikimedia Commons — mushy/blackened roots vs. healthy white roots).

At a glance

  • Cause: Overwatering / poor drainage → roots suffocate and rot
  • Tell-tale sign: Plant wilting even though the soil is wet; dark, mushy, smelly roots
  • Severity: Serious — the #1 killer of houseplants

How to identify

The cruel trick of root rot is that it looks like underwatering — wilting, drooping, yellowing leaves — so people water more, making it worse. The difference: with root rot the soil is already wet. Slide the plant out of its pot and look at the roots:

  • Healthy roots: firm, white or tan.
  • Rotted roots: brown/black, mushy, slimy, often with a foul, swampy smell; they may pull apart or slough off. The base of the stem may also turn soft and dark.

What causes it

Roots need air as well as water. When soil stays waterlogged — too-frequent watering, no drainage hole, dense soil, or a saucer of standing water — roots can’t breathe, die, and are then colonized by opportunistic water-mould fungi that accelerate the collapse.

Treatment & management

Following Integrated Pest Management (here, cultural correction is the cure):

  1. Stop watering and unpot the plant.
  2. Trim away all mushy, dark roots with clean scissors, back to firm healthy tissue. Remove rotted lower leaves/stems.
  3. Repot into fresh, dry, well-draining mix and a clean pot with a drainage hole (size it to the reduced root system — don’t overpot).
  4. Water sparingly afterward while it recovers; bright indirect light, no fertilizer yet.
  5. If the rot is severe, take cuttings from any healthy top growth and start over — sometimes the most reliable save.

Prevention

  • Water based on the soil, not the calendar — check before you pour. See Watering & Root Health.
  • Always use pots with drainage; never let plants sit in standing water.
  • Use appropriately airy mix; don’t overpot.

Affects (in this guide)

Every houseplant here — especially Snake Plant, Pothos, Peace Lily, and Fiddle-Leaf Fig — and even drought-loving natives like Eastwood’s Manzanita and Brittlebush if given summer water or poor drainage.

Sources