How do I treat spider mites on indoor plants?
First Steps: Isolate and Identify
Spider mites are tiny pests that thrive in warm, dry indoor air. They look like specks of dust on the undersides of leaves and often leave fine webbing between leaves and stems.
As soon as you spot them, move the plant away from others to stop the mites from spreading. Check nearby plants too, since mites can travel on drafts or by touching leaves.
A hand lens or magnifying glass helps you see them clearly. You might also notice stippled, yellowing leaves that eventually turn brown and drop.
- Look for fine webbing on leaf joints and stems
- Check leaf undersides for moving specks
- Isolate the affected plant immediately
Treatment That Works
Start by spraying the plant with a strong stream of water in the sink or shower. This dislodges mites and their webs. Then apply insecticidal soap or neem oil, covering the undersides of leaves and stems thoroughly.
Repeat the treatment every 3 to 5 days for at least two to three weeks. This breaks the mite life cycle, because eggs hatch in a few days and the new mites must be killed before they lay more eggs.
If the infestation is severe, you can also use a miticide labeled for indoor plants. Always follow the label directions and test on a small leaf area first to avoid burning the plant.
- Spray with water to remove webs and mites
- Apply insecticidal soap or neem oil, covering all leaf surfaces
- Repeat every 3–5 days for 2–3 weeks
- Raise humidity around the plant to discourage mites
Prevention and Aftercare
Spider mites prefer dry, dusty conditions. Regular misting, using a pebble tray, or running a humidifier can make your home less inviting to them.
Keep plants clean by wiping leaves with a damp cloth every few weeks. This also lets you spot pests early.
After treatment, monitor the plant for another month. If you see new webbing, start the treatment cycle again.
- Maintain humidity above 50% if possible
- Wipe leaves regularly to remove dust
- Quarantine new plants for 2 weeks before adding to your collection
Common mistakes
- Spraying only the top of leaves and missing the undersides where mites live.
- Giving up after one treatment instead of repeating every few days to kill newly hatched mites.
- Using a harsh chemical pesticide indoors without ventilating, which can harm pets or people.
