How to Get Rid of Spider Mites

Updated August 2026 · Garden Advice Guide

Spider mites explode in hot, dry, dusty conditions, so the fastest way to get rid of them is to change those conditions: hose the plant down hard, hit the leaf undersides, and repeat every three days. Water is both the cheapest control and the best prevention, and on outdoor plants it often ends an outbreak by itself. Sprays come second, and the wrong spray makes the problem worse.

Dusty, drought-stressed plants are mite magnets. Get your watering schedule right first with our free watering guide, because a plant that isn't thirsty is a plant mites struggle to build numbers on.

Updated August 2026

How to Get Rid of Spider Mites, in the Right Order

This is the order that works, and with mites the order matters more than with most pests because step four can undo steps one through three.

1. Cultural. Water properly, wash dust off foliage, avoid heavy nitrogen feeding, raise humidity around indoor plants, and space plants so air moves.
2. Physical. A forceful water spray to leaf undersides every 3 days, wiping leaves on broad-leaved houseplants such as a Chinese evergreen, and pruning out the worst-infested growth.
3. Biological. Protect the predatory mites and lady beetle larvae already present, and buy predatory mites for greenhouses and long indoor infestations.
4. Chemical, last. Insecticidal soap and horticultural oil first, then a true miticide only if those fail, rotating mode-of-action classes and following the label exactly.

Do not skip to step four. It's the single most common mistake with this pest, and it's the reason so many gardeners report that their mite problem got dramatically worse after they sprayed.

Spider Mites Are Arachnids, Not Insects, and That Changes Everything

This is not a technical footnote. It is the whole reason spider mite advice goes wrong.

Spider mites are in the class Arachnida, alongside spiders, ticks, and scorpions. They have eight legs as adults, no antennae, no wings, and a body built as one fused piece rather than the head, thorax, and abdomen of an insect. The two-spotted spider mite, Tetranychus urticae, is the one most home gardeners meet, and an adult is about 1/50 of an inch long. You are looking for a moving speck.

Most general-purpose insecticides are not labeled for mites, and many simply don't kill them. Broad-spectrum insecticide classes built for chewing and sucking insects act on nerve targets that mites tolerate far better. People spray, see no change, spray again at a higher frequency, and conclude the mites are unkillable. They aren't. They were never being hit.

Here's the part that turns a nuisance into a disaster.

The wrong spray kills your mite predators and leaves the mites. Your garden already contains predatory mites, minute pirate bugs, six-spotted thrips, and the tiny black lady beetle Stethorus, and all of them eat spider mites for a living. They are insects (except the predatory mites, which are also arachnids but far more sensitive to residues). A broad-spectrum spray wipes them out in one pass. The spider mites that survive then breed with nothing eating them.

That effect has a name in the literature: pest resurgence, or a mite flare. It is documented across pyrethroid and carbamate classes, and it's also documented with some systemic neonicotinoid treatments, where the plant's own chemistry appears to make mite reproduction faster rather than slower. Repeated use of the wrong product does not slowly fail. It actively feeds the outbreak.

Practical rule: if a label doesn't say "mites" or "mite" in the pest list, it will not help you, and it will probably hurt you. Read the pest list before you buy, not after.

How to Confirm It's Spider Mites

Three signs, in the order you'll notice them.

Stippling on the leaf tops. Spider mites feed by puncturing individual leaf cells on the underside and draining them. Each drained cell leaves a pale dot. From above, the leaf looks lightly sanded, or dusted with fine pale speckles, often starting near the midrib and along the veins. As feeding continues the stipple runs together into a bronzed, dull, dusty look, then the whole leaf goes yellow, then dry and crisp. Colors vary by plant: beans go bronze, tomatoes go gray-green, cucumbers go pale yellow, conifers go rust-brown.

Fine webbing on the undersides and in leaf axils. This is the confirmation, but it's a late sign. Silk appears where the leaf meets the stem, across the tips of shoots, and in bad cases as a sheet over whole branch ends with mites walking on it. If you can see webbing from across the room, you have thousands of mites and you're weeks into the problem.

The white paper test, done properly. This is how you confirm before webbing appears, and it takes ten seconds.

1. Take a sheet of plain white paper or a white paper plate. Nothing patterned.
2. Hold it flat, level, directly under a suspect leaf or the tip of a suspect branch. Get it close, within about two inches.
3. Sharply tap or flick the leaf three or four times with your finger. Firm taps, not a shake.
4. Hold still and watch the paper for a full 30 seconds. Do not blow on it.

Dust and plant debris fall on the paper and sit there. Spider mites walk. Within 15 to 30 seconds you'll see specks moving across the white in slow, wandering lines. That movement is the whole test.

For a second confirmation, drag your fingertip across the specks. Spider mites smear into reddish-brown, rust, or greenish streaks. Dust smudges gray. Two-spotted mites are pale yellow-green with a dark blotch on each side of the body; the spruce spider mite and southern red mite look dark green to nearly black; the so-called red spider mite is brick red.

One more useful distinction: if the specks on the paper are moving fast and are noticeably bigger, you may have predatory mites, which are usually shiny, pear-shaped, and often orange or tan with no spots. Do not spray those. They're the free help.

Why Spider Mites Explode So Fast in Heat

The life cycle explains the outbreak curve and the resistance problem at the same time.

A single female lays 90 to 120 eggs over a two to four week adult life, often 10 to 20 a day. At 90°F, with a five day cycle, a handful of mites on one leaf in early July is a bronzed, webbed plant by early August. That is not an exaggeration of the math, it's just the math.

Fast generations are exactly why resistance appears so quickly. Every generation is a new roll of the dice, and mites roll far more often than most pests. Add a haplodiploid sex system, where unfertilized eggs become males, and any resistance gene that turns up is expressed immediately in males rather than hiding as a recessive trait for generations. Two-spotted spider mite has documented resistance to more classes of miticide than almost any other arthropod pest on earth, and greenhouse populations have been recorded losing susceptibility to a new material within two to three seasons of heavy use.

The takeaway for a home gardener: never use the same chemical class twice in a row on the same population. If you use anything at all, rotate to a different mode-of-action group each time, and lean on the non-chemical steps between applications so the population never gets a long, uninterrupted selection run.

Spider Mite Control Compared

Two things to notice. Almost nothing on this list kills eggs well, which is why every treatment has to be repeated on a 5 to 7 day schedule for at least three rounds. One application always fails, because the eggs that survive hatch four days later into a plant you've stopped watching. And the two entries that need no chemistry at all are the two at the top.

The Water Spray, Done Right

This is the step people do halfheartedly and then dismiss.

Aim upward. Mites live on the undersides. A sprinkler wetting leaf tops does very little. Use a hose nozzle on a jet or shower setting, get the wand under the canopy, and drive water up into the leaf undersides until they're dripping.

Use real pressure. Enough to visibly move the leaves without tearing them. On tomatoes, beans, and cucumbers that's more force than most people expect.

Do it in the morning. Foliage dries by afternoon, which keeps fungal disease out of the picture.

Repeat every 3 days for at least 3 weeks. Three days is shorter than the egg-to-adult cycle in summer heat, so you keep knocking the population back below the point where it can build.

Wash the dust off nearby paths and mulch too. Roadside and driveway dust is a genuine driver of mite outbreaks because it interferes with the predators far more than with the mites.

Worked example: a bronzing bean row in an August heat wave

Say you have a 12 foot row of pole beans, temperatures at 92°F, no rain in two weeks. Lower leaves are stippled and there's light webbing in the leaf axils on three plants.

• Day 0. Water the bed deeply, 1 inch of water, about 7.5 gallons per 12 square feet. Then spray every plant's leaf undersides with the hose for 60 seconds per plant, about 12 minutes total. Prune off the six worst lower leaves and bag them.
• Day 3. Hose again, undersides, 12 minutes. Run the paper test on the worst plant. Expect fewer moving specks, not zero.
• Day 6. Hose again. If the paper test still shows heavy movement, add one round of insecticidal soap or a light horticultural oil in the evening, sprayed to drip from below.
• Day 9, 12, 15. Hose. Second soap or oil round on day 12 only if needed.
• Day 21. Paper test should show one or two specks or none. New growth at the top should be clean green, which is the real success signal. Old stippled leaves never recover their color, so judge by the new leaves.

Total chemical use: at most two applications. Total cost: a few gallons of water and about two hours across three weeks.

Insecticidal Soap and Oils: Coverage Is Everything

Both of these are contact-only materials. They kill what the spray physically wets and have essentially no residual activity once dry. There is no such thing as a soap or oil application that protects the plant tomorrow.

That means coverage is not a detail, it is the entire job.

• Spray from underneath, moving the wand up into the canopy. Leaf tops are the least important surface.
• Spray to the point of runoff. Every leaf underside should be visibly wet.
• Get the stems, the leaf axils, and the growing tips, which is where mites concentrate first.
• Repeat at 5 to 7 day intervals, three times minimum, because eggs survive.

Two cautions that matter. Do not apply oils or soaps when it's above about 90°F or when the plant is wilted from drought, because leaf burn goes up sharply. And do not apply oil within about two weeks of a sulfur application on the same plant, because that combination is a well-known cause of foliage injury.

Some plants are sensitive to soaps and oils no matter what you do. Test one leaf, wait 48 hours, then treat the whole plant if there's no damage.

Predatory Mites: The Fix Most Gardeners Skip

If you have a greenhouse, a sunroom, or a stubborn indoor infestation, buying predators is genuinely the most effective option available to a home grower, and it's the only one that gets better over time instead of worse.

The main species and what they suit:

• Phytoseiulus persimilis eats two-spotted spider mite exclusively and eats it fast. It wants moderate temperatures and humidity above roughly 60 percent. It's the specialist you release into an established hot spot.
• Neoseiulus californicus tolerates heat and drier air, survives on low prey numbers, and persists. It's the one to use as insurance rather than as a rescue.
• Amblyseius andersoni works over a wide temperature range and handles cooler conditions well.

Release rates depend on infestation level and area, and every supplier prints their own. Follow theirs rather than a number from an article.

The non-negotiable part: you cannot use predators and broad-spectrum sprays together. Residues from many insecticides remain toxic to predatory mites for weeks. If you have sprayed recently, ask the supplier how long to wait before releasing.

Indoor and Greenhouse Plants Are a Different Problem

Outdoors, weather and natural predators do half the work for you. Rain knocks mites off. Predators arrive on their own. A cool, wet week can end an outbreak without you doing anything.

Indoors, none of that happens. Winter heating drops indoor humidity to 20 or 30 percent, which is close to ideal for mites, and there are no predators at all unless you buy them. This is why houseplant mite problems drag on for months while the same pest outdoors resolves in three weeks.

What changes indoors:

Isolate immediately. Move the affected plant to a different room the day you confirm it. Mites walk between touching leaves and ride on sleeves, watering cans, and pets.

Shower the plant, don't mist it. Misting raises humidity for about ten minutes and accomplishes little. Carry the plant to the sink or shower, tip it slightly, and run lukewarm water over the leaf undersides for a minute or two. Repeat weekly.

Wipe the leaves. On plants with big, tough leaves like ficus, monstera, and citrus, a damp cloth wiped over both surfaces removes mites, eggs, and webbing better than any spray. It's slow and it works.

Raise humidity for real. A pebble tray does almost nothing. Grouping plants together helps a little. A room humidifier held at 50 to 60 percent helps a lot, and it also happens to be what most houseplants want anyway.

Treat the pot rim, the saucer, and the shelf. Mites overwinter and hide off the plant.

In a greenhouse, add two things: keep humidity up with damping down on hot afternoons, and put yellow sticky cards at canopy height so you catch the population's growth curve early. Greenhouses are also where predatory mites pay for themselves, because the enclosed space keeps them on your plants.

If you're fighting mites on tomatoes under cover, the growing conditions themselves are half the battle, and our guide on how to grow tomatoes covers the watering and airflow side that keeps plants out of the stressed state mites exploit.

Where Chemical Control Fits, and Its Limits

If you've done the water, the sanitation, and two rounds of soap or oil, and a paper test still shows heavy movement on new growth, this is the narrow situation where a true miticide is reasonable.

Buy a product whose label lists mites and lists your plant. Insecticide and miticide are not interchangeable words. The active ingredient classes commonly labeled for spider mites in home garden products include sulfur, mineral and plant-derived oils, soap salts of fatty acids, avermectins, tetronic acid derivatives, bifenazate-class materials, and METI acaricides. Which of these you can actually buy varies enormously by state and by year.

The label is the law. It's a legal document. It carries the only valid rate, the only valid interval, the crops it may be used on, and the days-to-harvest interval for anything edible. I am not going to give you a mixing rate, because the correct rate is the one printed on the container in your hand, and using anything else is both illegal and a good way to burn your plants.

Rotate mode-of-action groups every application. Look for the group code on the label, usually a number in a box near the top. Never run the same group twice in a row against the same population. This is the single practice that keeps a material working for more than a season.

Never spray a plant that is in bloom. Open flowers are where bees are, and bees are killed by direct contact with wet spray from most miticide classes, along with soaps and oils. Squash, cucumbers, beans, and fruit trees are all worked heavily by pollinators while in flower, and many of those visits happen in the first hours after sunrise. If a plant in your care must be treated during its flowering period, apply in the late evening after flowers have closed, keep the spray off the blossoms entirely, and accept that this is a compromise rather than a safe practice. If the choice is between spraying open flowers and losing one plant, lose the plant.

Where the sources genuinely disagree

Two points worth being honest about.

Neem oil. Some extension publications list neem-based products as an effective mite option; others note that neem's activity against spider mites specifically is weak and inconsistent compared to its activity against soft-bodied insects. Both positions have data behind them, largely because "neem" covers two different things: clarified hydrophobic neem oil, which works mostly as a smothering oil, and azadirachtin extracts, which work as a growth disruptor. My recommendation: treat neem oil as an ordinary horticultural oil, judge it on coverage, and don't expect the growth-disruption effect to carry the outbreak.

Whether hosing spreads mites. A minority of sources warn that spraying with water flings mites onto neighboring plants and worsens spread. Most extension guidance recommends water sprays as a first-line control. The concern isn't imaginary, but the mites you dislodge onto wet soil largely don't make it back up. My recommendation: hose anyway, hose upward rather than sideways across a row, and treat the neighboring plants on the same schedule so it doesn't matter either way.

Prevention for Next Season

• Water deeply and consistently. Drought-stressed plants are the ones that get hit, every time. Our watering guide sets the schedule by crop and weather.
• Keep dust down. Mulch bare soil, water dusty paths, and don't site sensitive plants along a gravel drive.
• Go easy on high-nitrogen fertilizer. Soft, fast, lush growth raises mite reproduction rates measurably.
• Scout weekly in hot weather with the paper test. It takes ten seconds and catches outbreaks two weeks earlier than your eyes will.
• Inspect every new plant before it comes home, and quarantine houseplants for two weeks.
• Leave flowering plants around the garden to support the predators that work for free.

FAQ

What kills spider mites instantly?

Nothing does, and any product promising it is overselling. A forceful water spray removes most of the mobile mites on contact, and insecticidal soap or horticultural oil kills what the spray physically wets, but the eggs survive everything. That's why control means repeating a treatment every 5 to 7 days for at least three rounds rather than looking for a single knockout.

Does soapy dish detergent work on spider mites?

Dish detergent is a degreaser, not an insecticidal soap, and it strips the waxy cuticle off leaves along with the mites. People do use it and it does kill mites, but leaf burn is common and the risk goes up in heat. Insecticidal soap is a specific potassium salt of fatty acids formulated for plants, it costs very little, and it's the better choice.

Can a plant recover from spider mite damage?

The plant recovers, the damaged leaves don't. Stippled and bronzed leaves have dead cells and will never turn green again, so judge your success by whether the new growth coming out of the top is clean. If a plant has lost more than about half its leaf area it may be worth removing it rather than nursing it, especially if it's sitting next to healthy plants.

Why do spider mites keep coming back?

Almost always one of three reasons: the treatment was done once instead of three times, so surviving eggs restarted the population; the spray never reached the leaf undersides where the mites actually live; or a broad-spectrum insecticide killed the predatory mites and left the pest. Hot, dry, dusty conditions with no change to watering keep the door open for all three.

Do spider mites live in the soil?

Not really. They feed on leaves and spend their lives on the plant, though they will shelter in cracks in the pot, under the rim, on the saucer, and in leaf litter at the base, and some species overwinter in bark crevices and ground debris outdoors. Replacing potting soil does not solve a spider mite problem, but cleaning the pot and the surrounding surfaces genuinely helps.

How do I tell spider mites from aphids?

Size and shape settle it. Aphids are pear-shaped, visible without magnification at about 1/8 inch, cluster on new growth and stems, and leave sticky honeydew that turns black with sooty mold. Spider mites are specks, live on leaf undersides, cause fine pale stippling rather than curled growth, and produce webbing instead of stickiness. Our guide on how to get rid of aphids covers that pest, and the controls only partly overlap.

Does rubbing alcohol kill spider mites?

Yes, on contact, and a cloth dampened with diluted rubbing alcohol is a reasonable way to wipe down a few tough-leaved houseplants. It's not a spray for a whole garden, it damages soft and hairy foliage, and it has no residual effect at all. Test one leaf first and wait a day before doing the rest of the plant.

When are spider mites most active?

Mid to late summer outdoors, during hot dry stretches with no rain, and any time from late fall through early spring on indoor plants once heating dries the air out. The peak lines up with temperatures in the 80s and 90s, because that's where the life cycle compresses to under a week. Cool, wet weather suppresses them on its own.

Spider mites are a conditions problem more than a chemistry problem. Fix the water, wash off the dust, spray upward every three days, and protect the predators that are already working your garden for free. If you're seeing pale, speckled leaves and you're not sure the mites are actually the cause, tomato leaves turning yellow walks through the other likely culprits.

Source: University of California Statewide IPM Program, "Spider Mites" Pest Note (ipm.ucanr.edu). Always read and follow the pesticide label. The label is the law.