Isolate the plant, rinse the leaves — undersides included — then spray with insecticidal soap or horticultural oil every 5 to 7 days for 3 to 4 weeks. One spray is never enough: eggs survive the first treatment, so the repeats are what actually end the infestation.
Spider mites are tiny — adults are only about 0.5 millimetres long — so by the time you spot fine webbing, a colony is usually well established on the undersides of the leaves. The good news: you do not need a dramatic response. A calm sequence of isolate, rinse, spray, and repeat clears most houseplant infestations, as long as you keep going long enough to catch the mites that hatch after the first spray.
How to Tell It Is Really Spider Mites
Spider mites are arachnids, not insects, and the common houseplant species is the two-spotted spider mite. They live in colonies on leaf undersides, pierce leaf cells, and feed on the contents. That feeding leaves pale speckles, called stippling, across the leaf. As numbers grow, leaves look dull or washed out, then dry and drop.
Confirm before you spray. Hold a sheet of white paper under a suspect leaf and tap the leaf firmly. Tiny moving dots on the paper are mites. Also check leaf undersides with a magnifier if you have one, and look for fine silk webbing where leaves meet stems. If you see stippling but no mites, webs, or moving dots, re-check in a few days before treating — dust and other pests can look similar at first glance.
| Spider mites | Fine stippling, tiny moving dots on undersides, fine webbing when numbers are high. |
| Mealybugs | White cottony clumps in leaf joints and on stems, sticky honeydew. |
| Thrips | Silvery streaks and deformed new growth, tiny dark insects that jump or fly. |
| Real spiders | A single large web in a corner, no stippling, no leaf damage. |
| Dust | Dull leaves, no dots, no webs, wipes off cleanly and does not return in days. |
Step 1: Isolate the Plant and Check Its Neighbours
Move the infested plant away from your other plants at once, so leaves cannot touch. Spider mites spread by crawling, by air currents, and on hands and tools. Then inspect every plant that stood near it, especially leaf undersides and new growth. Treat neighbours that show mites too, even if the damage looks light — catching a second colony early is far easier than chasing it later.
Wash your hands and wipe tools after handling the infested plant, and keep it isolated until you have had two weekly checks in a row with no live mites.
Step 2: Rinse Them Off
Take the plant to a sink, shower, or bathtub. Support the pot, tilt it if needed, and spray the whole plant with lukewarm water, aiming up at the leaf undersides as well as the tops. Wipe stubborn webbing off with a damp cloth, supporting each leaf from below so you do not snap it. Let the plant drip-dry fully before it goes back to its spot.
This rinse alone removes a large share of the mobile mites and makes every spray that follows work better. It is not a cure on its own, though — eggs and hidden mites survive it, which is why the spray-and-repeat steps below matter. Skip delicate, fuzzy leaves for hard spraying; wipe those gently instead.
Step 3: Spray With Insecticidal Soap or Horticultural Oil
After rinsing, spray with a commercial insecticidal soap or horticultural oil labelled for houseplants and for spider mites. These work on contact, so coverage decides success: wet the undersides of every leaf, the stems, and the leaf joints, not just the leaf tops. Follow the product label exactly for dilution and use, and test on one leaf first if the plant is sensitive. Apply in the evening or out of strong sun, and never spray a plant that is water-stressed or sitting in a very hot room.
The University of California IPM advises the same approach for houseplants: water sprays, insecticidal oils, or insecticidal soaps, with complete coverage of leaf undersides, and to be sure mites are present before treating.
Neem oil is a plant-derived oil that works in a similar contact way and can also disrupt feeding and reproduction. Use a labelled neem product rather than mixing your own spray from dish soap, alcohol, or essential oils — concentrations and additives vary too much to give a safe universal recipe, and the wrong mix can burn leaves. Rubbing alcohol dabbed on with a cotton swab can kill mites on contact on sturdy plants, but it has no lasting effect and can damage fuzzy or delicate leaves, so treat it as a spot tool, not the main plan.
Step 4: Repeat Every 5 to 7 Days for 3 to 4 Weeks
Eggs resist most contact sprays and hatch within days, so a single treatment only buys a quiet week. Repeat the rinse and spray every 5 to 7 days for 3 to 4 weeks. At about 75 degrees Fahrenheit, spider mites go from egg to adult in roughly two weeks, so a 3 to 4 week schedule catches more than one generation.
| Week 1 | Rinse + spray, isolate, check neighbours. |
| Week 2 | Rinse + spray, re-check undersides and new growth. |
| Week 3 | Rinse + spray, look for fresh stippling or live mites. |
| Week 4 | Rinse + spray if any mites remain; if none, move to weekly checks. |
| After week 4 | Weekly checks; call the plant clear only after two weekly checks in a row with no live mites. |
Keep the schedule even when the plant looks better after week one. Stopping early is the most common reason infestations bounce back.
What Not to Do
- Do not reach for a broad-spectrum insecticide first. Many general insecticides barely touch mites, kill the predators that eat them, and can make an outbreak worse.
- Do not rely on misting alone. A light mist does not remove mites; a strong rinse does, and even then it needs the spray repeats.
- Do not spray in strong sun or on a dry, stressed plant — that invites leaf burn. Water the plant normally first; see the overwatered-vs-underwatered guide if you are unsure whether it needs water.
- Do not move the plant back into the collection at the first clean-looking day. Wait for two clear weekly checks.
Predatory Mites: The Hands-Off Option
If sprays feel like a losing battle, or you have many plants, predatory mites such as Phytoseiulus persimilis eat spider mites and are safe around people and pets. They work best in a warm room with some humidity, and they need live mites to feed on, so do not spray insecticidal soap or oil right after releasing them. This option suits a large collection better than a single small plant, and it is worth considering before you give up on a favourite plant.
When to Throw a Plant Away
Sometimes discarding is the kindest choice for the rest of your collection. Consider it when most of the plant is covered in webbing, leaves are drying and dropping despite 3 to 4 weeks of treatment, or the plant is small and cheap to replace while your other plants are at risk. Before you carry it out, slip a plastic bag over it so mites cannot spread on the way. This is a judgement call, not a failure — a heavily infested plant can re-seed a whole shelf.
Stippled leaves will not heal back to green. Judge recovery by new growth: fresh leaves that come in clean, with no stippling and no webs, mean the treatment is working, even while older damaged leaves still look rough.
How to Stop Spider Mites Coming Back
Quarantine every new plant for 2 to 4 weeks before it joins your collection, and check its leaf undersides during that time. Keep plants out of hot, dry spots near heating vents, wipe dusty leaves regularly, and water adequately so plants are not drought-stressed — stressed plants suffer mite damage more severely. A humidifier or pebble tray can make conditions less friendly to mites; see the humidity guide for methods that actually raise humidity.
Make underside checks a habit: a quick look every couple of weeks catches the next colony while it is still small. For other pest checks, see How to Get Rid of Fungus Gnats in Houseplants, How to Get Rid of Mealybugs on Houseplants, and Tiny White Bugs in Houseplant Soil.
Related rescues
How to Get Rid of Mealybugs on Houseplants — How to Get Rid of Fungus Gnats in Houseplants — Tiny White Bugs in Houseplant Soil
Can I get rid of spider mites with water alone?
A strong rinse removes many mites, but it rarely ends an infestation on its own because eggs and hidden mites survive. Rinse first, then spray with insecticidal soap or horticultural oil and repeat every 5 to 7 days for 3 to 4 weeks.
How often should I spray for spider mites?
Every 5 to 7 days for 3 to 4 weeks. That schedule catches mites that hatch after each spray, since eggs resist most contact treatments.
Does neem oil kill spider mites?
Yes, when a labelled neem product covers the mites, including leaf undersides. It works on contact and can disrupt feeding and reproduction, but it still needs repeating every 5 to 7 days.
Why do spider mites keep coming back?
Usually because treatment stopped too early, a neighbouring plant was missed, or sprays never reached the leaf undersides. Finish the full 3 to 4 week schedule, check neighbours, and wait for two clear weekly checks before calling the plant clear.
Should I throw away a plant with spider mites?
Not usually. Most infestations clear with rinse, spray, and repeat. Discard only if most of the plant is webbed, it keeps declining after a full treatment schedule, or it risks the rest of your collection — and bag it before carrying it out.