Spider Mites on Monstera — Identification, Treatment, and Prevention
Monstera (Monstera deliciosa)
Symptoms
- webbing on leaves
- stippled leaves
- tiny dots on leaves
- fine webbing
- pale dusty leaves
- spider mites
- mites
- bronze stippling
Causes
Low humidity
Tetranychus urticae (two-spotted spider mite) and related species thrive in warm, dry conditions. Indoor environments with humidity below 40% — particularly during winter heating season — are prime mite habitat. Spider mites on Monstera are most common during the cold months or in homes with dry air. The mites reproduce explosively in these conditions, with populations doubling every few days.
Introduction from new plants
Spider mites are frequently introduced on newly purchased plants, even those that look healthy. The eggs are microscopic and invisible to the naked eye, and mites can survive on plants in stores or nurseries without causing visible symptoms until they reach your home's conditions.
Stressed or weakened plants
Monstera that is already stressed — from inconsistent watering, poor light, or nutritional deficiencies — is more vulnerable to spider mite infestation and less able to mount a natural defense. A well-maintained Monstera has stronger cell walls that resist initial mite feeding.
How to Fix It
- 1
Confirm the diagnosis: hold a white piece of paper under a leaf and tap or shake the leaf. Tiny moving dots on the paper (less than 1mm, reddish or green-yellow) are spider mites. You may also see fine, gauzy webbing in leaf axils and on the undersides of leaves.
- 2
Isolate the plant immediately. Move it away from all other plants. Spider mites move between plants that are touching and can also drift on air currents when infestations become heavy.
- 3
Take the plant to a sink or shower and hose down both sides of every leaf, working the water stream into the deep sinuses of Monstera's split, fenestrated leaves as well as the flat surfaces — the notches and holes create pockets where webbing and mites can shelter from a rushed rinse.
- 4
Apply a miticide treatment. Neem oil solution (2 tablespoons neem oil + 1 teaspoon dish soap per quart of water) applied to all leaf surfaces is effective and safe for Monstera. Alternatively, insecticidal soap spray works well on contact. A third option is a dedicated miticide containing abamectin or spiromesifen if the infestation is severe. A ready-to-use neem oil product is effective and convenient for houseplant mite treatment.
- 5
Space applications five to seven days apart and plan on at least three rounds — a single pass only kills mites already active, and Monstera's large leaf surface area gives eggs tucked in unreached folds and sinuses a real chance to hatch a second wave if you stop early.
- 6
Run a humidifier near the plant and pull it back from any heating vent — Monstera's large leaves lose moisture fast in dry air, which is part of why mites find it such a hospitable host to begin with, and a sustained humidity increase removes that advantage.
Prevention
- Maintain indoor humidity above 50%, especially during winter heating season
- Hold a newly purchased plant separate from established ones for its first two to three weeks in the home
- Wipe Monstera leaves monthly with a damp cloth — this removes dust, mite eggs, and early infestations before they establish
- Inspect leaf undersides regularly, especially during winter
- Keep the plant healthy — well-watered, well-fed, in good light — to reduce stress-related vulnerability
Quick Summary
| Plant | Monstera (Monstera deliciosa) |
|---|---|
| Category | Pests |
| Likely causes | Low humidity, Introduction from new plants, Stressed or weakened plants |
| Fix steps | 6 steps — see above |