Spider mites: inspect pale stippling and fine webs

Look for a pattern across leaves

Compare several leaves in the same light. Are many tiny pale points scattered across them, is a whole leaf becoming duller or is there only one large dry patch? Spider mite damage can look finely stippled, but other problems can look similar. Note whether young and older leaves are affected and whether the pattern is increasing. One old damaged leaf is a poor starting point for a new treatment without further inspection.

Inspect underneath with light and magnification

Support the leaf gently and inspect its underside, stalk and junctions. Tiny animals, shed skins and eggs are difficult to distinguish without magnification. The name red spider mite does not mean each animal must look clearly red. Try a steady close-up and add a whole-plant view. If you can only see blurred dots, identification remains uncertain. A better magnified view or expert help is more useful than confident naming from indistinct points.

Put webbing into context

Heavy infestation can produce fine silk threads. One isolated strand may also belong to an ordinary spider. Check for stippling and many tiny animals on the same affected leaves. Describe the location precisely, such as the stalk and several undersides, rather than simply writing spiderwebs. Photograph threads before cleaning. Otherwise an important part of your initial observation disappears and you are left remembering an appearance that cannot easily be checked again.

Inspect nearby plants when suspicion is reasonable

Give the plant some distance from others if practical and if the new position meets its needs. Examine neighbouring plants individually instead of treating the entire collection automatically. Avoid wiping every plant with the same unclean cloth. Separation should not mean moving the plant into a cold dark corner and creating another problem. Distance and closer observation are cautious first steps; they do not establish which pest is present.

Separate cleaning from targeted treatment

Gentle washing can help remove animals and dust on plants that tolerate it. Suitability depends on the species; avoid soaking an already wet rootball again. Further treatment requires a reasonable identification and instructions appropriate for indoor plants. The RHS links to specific advice for sap feeders. Increasing humidity does not replace monitoring and is not a reason to keep every plant’s mix permanently wet. Consider the whole plant when choosing how to wash.

Monitor fresh damage and live animals

Choose one affected leaf and one previously clear leaf for comparison. At later checks, note live animals, new threads and additional stippling. Existing marks may remain even when an action helps. Record what you applied and the follow-up instructions. If the problem spreads or the plant declines strongly, seek help choosing the next step. Spraying more frequently without a clear basis does not make the cause or the result easier to assess.

Do not treat every tiny animal alike

Mites, thrips and other small animals have different features and control options. Beneficial mites also exist. The colour of a moving dot is insufficient for choosing a product. Avoid arbitrary mixtures of oil, soap and pesticides. A clear animal photograph with upper leaf surface, underside and overall plant is a better starting point. PlantDoctor can suggest possibilities; reliable pest identification may still require someone to examine the specimen or a clearer magnified image.

Common questions about this topic