Florli

Plant problems

White coating on leaves

Location, texture and whether the coating returns help distinguish residue from living pests or disease.

Residue

Hard water or sprays can leave pale mineral marks.

Fungus

Powdery growth may expand in dense still foliage.

Pests

Mealybugs create cottony clusters around joints and veins.

Problem

What to do next

  1. 1

    Photograph the coating closely before wiping it.

  2. 2

    Separate the plant if the change is spreading.

  3. 3

    Choose treatment only after identifying residue, fungus or pests.

Observation

When to act sooner

  • The coating spreads over new growth.
  • Leaves distort or yellow quickly.
  • Several nearby plants show the same signs.
Important

White coating on leaves can have several causes. Confirm the plant, conditions and recent care before choosing a treatment.

Florli

Related guides and features

Library Plant problems Yellow leaves, brown spots and root problems: learn what to inspect first and how to avoid making the situation worse. Read the guide → Feature Plant problem checker Florli helps you organize symptoms, consider possible causes and choose a cautious next step without presenting an uncertain result as a definite diagnosis. Read the guide → Feature Plant and garden journal Record watering, feeding, mowing, planting, pruning and your own notes in a history attached to the right plant or place. Read the guide →
Sources and further reading: University of Illinois Extension: houseplant care

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Prepared by Florli. This is general guidance. Sources are listed with each guide, and every decision should reflect the species, location, weather and the plant’s current condition.