Inspect the right places
Look under leaves, along stems, inside new growth, and at soil level. Pests hide where casual glances miss them.
Topic
Houseplant Pests
Pests often masquerade as watering or light problems. Yellowing, curling, spots, and weak growth can all happen when leaves are being damaged. Look for pest clues before spraying randomly.
Check my plantCommon situations covered
houseplant pestsfungus gnats in houseplantssticky leaves on houseplantswebbing on plant leavestiny black specks on houseplants
Where to start
Match the clue
Webbing suggests mites, sticky residue suggests sap-feeders, tiny flies suggest fungus gnats, and black specks with silvery marks can suggest thrips.
Isolate before treating
Isolation protects nearby plants while you identify the pest and repeat treatment through the life cycle.
What it could be
Fungus gnats
What you may see: Small dark flies rise from damp soil.
Next check: Check soil moisture, drainage, and larvae-stage treatment.
Spider mites
What you may see: Fine webbing, stippling, dusty leaves.
Next check: Inspect undersides and dry, stressed plants.
Thrips
What you may see: Silvery patches, black specks, distorted new growth.
Next check: Check tender leaves and isolate quickly.
Scale or mealybugs
What you may see: Sticky leaves, bumps, or cottony white clusters.
Next check: Inspect stems, leaf joints, and undersides.
What to do next
- Move the suspect plant away from healthy plants.
- Use a flashlight and inspect the whole plant.
- Remove heavily damaged leaves when pest pressure is high.
- Treat the specific pest you find, not a guessed pest.
- Repeat inspections because eggs and larvae may remain.
Common mistakes
- Spraying without identifying the pest.
- Treating leaves when the pest stage is in the soil.
- Forgetting to inspect nearby plants.
- Stopping after one treatment.
Useful checks and guides
By plant
Houseplant Pests by plant
Use these guides when the symptom is clear but the plant type changes what you should check first.
Pothospothos brown spotsCheck leaf damage, pests, watering, and sun exposure.Spot texture and placement can point to very different fixes.Open guideMonsteramonstera brown spotsUse texture and location to separate scorch, root stress, and pests.Dry scorch, soft spots, and pest speckling should not be treated the same way.Open guideCalatheacalathea leaves curlingCheck timing, dry soil, humidity, pests, and heat exposure.Calatheas react quickly to moisture, heat, and pest pressure.Open guideCalatheacalathea brown tipsCheck mineral buildup, dry air, uneven moisture, and mites.Brown tips can build slowly even after the immediate stress has passed.Open guideAlocasiaalocasia yellow leavesSeparate normal leaf cycling from pests, cold, or watering swings.Alocasias can shed older leaves, but pests and cold need a close look.Open guideScheffleraschefflera dropping leavesConnect leaf drop with low light, wet soil, drafts, or scale.Leaf drop often follows a placement change, wet roots, or scale.Open guide
FAQ
What is the first sign of houseplant pests?
Early signs include sticky residue, fine webbing, tiny moving specks, black dots, silvery patches, distorted new growth, or small flies around soil.
Should I isolate a plant with suspected pests?
Yes. Isolation is a gentle first step that prevents spread while you confirm the pest.
Can pests make leaves yellow?
Yes. Pest damage can cause yellowing, curling, spots, and weak growth, especially on new leaves.
Useful guides
Read the full walkthroughs
Yellow Leaves8 min read
Why Are My Plant Leaves Turning Yellow?
Yellow leaves can come from overwatering, underwatering, low light, pests, or normal aging. Context matters more than the color alone.
Read the guide
Watering Problems7 min read
Overwatered Plant Signs
An overwatered plant often looks thirsty. Wet soil, yellow lower leaves, drooping, fungus gnats, and soft stems are stronger clues than one symptom alone.
Read the guide
Plant-Specific Guides6 min read
Why Are My Monstera Leaves Turning Yellow?
Monstera yellow leaves often trace back to wet soil, low light, watering swings, root stress, or pests hiding on new growth.
Read the guide
Watering Problems7 min read
How to Save a Dying Houseplant
Before you throw the plant away, separate water stress, root rot, pests, light problems, temperature stress, and normal leaf loss.
Read the guide
Plant-Specific Guides6 min read
Fiddle Leaf Fig Brown Spots
Brown spots on a fiddle leaf fig can come from root stress, dry patches, sun scorch, edema, pests, or physical damage. Location and texture help narrow it down.
Read the guide
Plant-Specific Guides3 min read
Pothos Yellow Leaves: What to Check First
Pothos yellow leaves are usually about wet soil, low light, old inner leaves, dry swings, or pests hiding along the vines.
Read the guide
Brown Tips & Leaf Damage6 min read
Why Are My Plant Leaves Curling?
Curling leaves can come from dry soil, heat, pests, low humidity, overwatering stress, or too much light. The direction and timing help.
Read the guide
Pests7 min read
Fungus Gnats in Houseplants
Fungus gnats usually mean the soil surface is staying moist. Control them by changing watering, improving drainage, and targeting the larvae.
Read the guide
Plant-Specific Guides3 min read
Calathea Leaves Curling: Causes & Fixes
Calathea leaves curl from dry soil, low humidity, heat, mineral stress, direct sun, or pests such as spider mites.
Read the guide
Brown Tips & Leaf Damage6 min read
Brown Spots vs Brown Tips
Brown tips are usually repeated stress at the leaf edge. Brown spots can point to scorch, pests, root problems, edema, or physical damage.
Read the guide
Plant-Specific Guides2 min read
Philodendron Yellow Leaves
Philodendron yellow leaves usually come from wet soil, low light, older leaves, dry swings, or pests around new growth and nodes.
Read the guide
Plant-Specific Guides3 min read
Rubber Plant Dropping Leaves
Rubber plants drop leaves after watering swings, low light, cold drafts, moves, pests, or root stress.
Read the guide