Spider mites are tiny plant-feeding arachnids that can turn healthy houseplants speckled, dusty, bronzed, webbed, and weak. They feed by piercing plant cells and removing contents, which creates fine stippling on leaves. Heavy infestations create fine silk webbing, leaf drop, and decline.
Spider mites thrive on stressed plants, especially in warm, dry conditions. They often arrive on new plants, outdoor plants brought indoors, cuttings, or plants that spent summer outside. The best fix combines isolation, physical removal, repeated cleaning, better plant care, and labeled low-impact products such as insecticidal soap or horticultural oil when needed.
If you are dealing with flying gnats from soil, read Fungus Gnats in Potting Soil. If the insects flutter when disturbed, read How to Get Rid of Whiteflies Naturally. For sap-feeding aphids, use Aphid Control Without Damaging Plants.
Last updated: June 5, 2026.
Quick Answer
To get rid of spider mites on indoor plants, isolate the plant, rinse leaves thoroughly, wipe leaf undersides, prune heavily infested foliage, improve watering and humidity around the plant, and repeat cleaning every few days. Confirm mites by tapping leaves over white paper and looking for moving specks. If needed, apply insecticidal soap or horticultural oil labeled for houseplants, covering leaf undersides and repeating according to the label. Avoid broad insecticides that kill predators but miss mites.
Signs of Spider Mites
Look for:
- tiny pale stippling on leaves
- dusty or speckled appearance
- bronze or bleached leaves
- fine webbing on stems and leaf undersides
- leaf drop
- weak new growth
- moving specks under a hand lens
Spider mite webbing is very fine and often wraps leaves, buds, and stems. It is different from ordinary spider webs.
Confirm With the White Paper Test
- Hold white paper under suspect leaves.
- Tap or shake the leaves sharply.
- Watch for tiny moving specks.
- Smear a speck with your finger.
Plant-feeding mites may leave a greenish or reddish-brown streak. A hand lens helps because mites are extremely small.
Step 1: Isolate the Plant
Move the plant away from other houseplants immediately. Spider mites can spread on webbing, plant contact, clothing, tools, and airflow.
Also inspect nearby plants. Mites often spread before symptoms are obvious.
Step 2: Rinse and Wipe
Physical removal is the fastest first step.
Options:
- shower the plant with lukewarm water
- spray undersides with a sink sprayer
- wipe leaves with a damp cloth
- use a soft brush for stems and leaf joints
Repeat every few days. One cleaning rarely removes all eggs and mites.
Step 3: Prune Badly Infested Growth
Remove leaves that are heavily webbed, badly stippled, or collapsing. Do not remove so much foliage that the plant cannot recover.
Seal discarded material in a bag and remove it from the home.
Step 4: Improve Plant Conditions
Spider mites favor stressed plants.
Help the plant recover by:
- watering correctly for the species
- avoiding drought stress
- keeping plants away from heat vents
- increasing humidity where appropriate
- giving enough light
- avoiding excess nitrogen fertilizer
- cleaning dust from leaves
Do not mist as the only strategy. Misting briefly raises surface moisture but usually does not control mites by itself.
Step 5: Use Soap or Oil if Needed
Insecticidal soap and horticultural oil can suppress spider mites when they contact the pest. Coverage is essential. Spray undersides of leaves, stems, and hidden areas.
Precautions:
- read the label
- confirm the plant is listed or tolerated
- test a small area first
- avoid direct sun after treatment
- avoid heat-stressed plants
- repeat at label intervals
Some houseplants are sensitive to oils or soaps.
When to Discard the Plant
Discard the plant if:
- it is heavily infested and low value
- mites have spread repeatedly
- the plant has lost most leaves
- it cannot be isolated
- treatment would risk a valuable collection
Sometimes replacing one plant saves twenty others.
Prevention
- inspect new plants before buying
- quarantine new plants
- shower plants before bringing them indoors
- clean leaves regularly
- avoid drought stress
- inspect leaf undersides
- keep plant collections spaced for airflow
- do not overfertilize
FAQ
Are spider mites insects?
No. They are arachnids, related to spiders and ticks. Some insecticides do not work well on mites.
Can spider mites kill houseplants?
Yes, severe infestations can weaken or kill plants, especially small or stressed plants.
Does neem oil kill spider mites?
Neem or horticultural oil products may help if labeled for mites and the plant, but coverage and repeat applications matter. Always follow the label.
Why do spider mites keep coming back?
Eggs, missed leaf undersides, nearby infested plants, dry stress, and incomplete repeat treatments are common reasons.
Related Reading
- Fungus Gnats in Potting Soil: Best Treatments
- How to Get Rid of Whiteflies Naturally
- Aphid Control Without Damaging Plants
Sources
- University of Minnesota Extension: Twospotted Spider Mites in Home Gardens
- University of Minnesota Extension: Managing Insects on Indoor Plants
- University of Maryland Extension: Mites in Home Gardens
- Illinois Extension: Managing Spider Mites in the Garden and at Home
- Penn State Extension: Twospotted Spider Mites