The leaves look faintly washed out, almost dusty. There are fine, cobweb-like threads on the undersides. Those are the signs of spider mites.
Spider mites are tiny — about 0.5mm long, barely more than a dot to the naked eye. But they reproduce at an astonishing rate, and by the time you notice them, there's often a full-blown outbreak. They're the classic summer enemy of houseplants.
3 signs that spider mites have moved in
- Faded, stippled leaves: Where mites suck out chlorophyll, tiny white dots appear; as it progresses, the whole leaf takes on a washed-out look
- Fine webbing on the undersides: If you see cobweb-like threads, the population is already quite large
- Moving dots under the leaves: Tap a leaf over a sheet of white paper and you'll see tiny red or yellow specks crawling around
Spider mites aren't the only cause of "white spots" — scale insects and powdery mildew can look similar. See our guide to identifying pests and diseases to tell them apart.
Why they explode in summer
Spider mites love heat and dry air. An air-conditioned room in summer is their ideal breeding ground. They also hate water, so indoor plants that never see rain become a predator-free paradise for them.
Which means the countermeasure is simply to do the opposite.
How to get rid of them
Step 1: Isolate the plant
Spider mites travel from plant to plant. As soon as you find them, move that pot away from your other plants. This alone stops the damage from spreading.
Step 2: Wash them off with water
Before reaching for any chemicals, start with a shower. Take the plant to the bathroom and rinse the whole plant, focusing on the undersides of the leaves. Spider mites are weak against water pressure, so this is the simplest and most effective removal method.
If the pot is too big to move, wipe each leaf with a damp paper towel or soft cloth instead.
Step 3: Repeat every few days
Spider mite eggs hatch in 2-3 days. The key to wiping them out is to not stop at one round — repeat 2-3 times, every 3-4 days. If you relax after a single shower, the survivors hatching from eggs will bounce right back.
Step 4: If they still won't go away, use a miticide
If repeated rinsing doesn't bring them under control, try a miticide made for spider mites — or, if you have pets or small children, start with something gentler like a starch-based spray. Mites build resistance to any single product, so rotate between different types.
The best prevention is misting
With spider mites, prevention is far easier than removal. And the single most effective prevention is regular misting that reaches the undersides of the leaves.
- In the morning or evening, mist until the leaf undersides are lightly damp
- Keep plants out of the direct blast of air conditioning
- Wipe the leaves now and then — it doubles as early detection
For the right way and time to mist, see how to mist your houseplants and why it works.
What about the damaged leaves?
Leaves that have lost their color won't recover, unfortunately. But there's no need to rush to cut them all off either. If a leaf can still photosynthesize, it's better for the plant's strength to leave it in place for a while, and tidy things up once new leaves have grown in.
In short — it all comes down to not letting things dry out
- When you find them: isolate → shower → repeat every 3-4 days
- Prevention: misting down to the leaf undersides + good airflow
- Air-conditioned summer rooms are outbreak central — build a habit that catches dryness early
"When did I last mist?" and "when did I last water?" are surprisingly hard to keep track of. Green Logs is a free watering tracker that records your care and reminds you when the next round is due — it works right in your browser. If you'd like a gentle rhythm for plant care, give it a try.