Diagnose a problem

Yellow leaves? Webbing? Sticky residue? Pick what's affected, narrow by what you see, and get the least-toxic fix first. Covers the 29 pests & diseases most common on houseplants.

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Affects houseplant Severity

29 results

1/8 swipe ›

Anthracnose 🦠

Moderate Disease

dark sunken lesions · blackened curling new leaves · leaf drop

1/15 swipe ›

Ants 🐛

family Formicidae

Minor Pest

ants on stems · ants farming aphids · sticky leaves

1/15 swipe ›

Aphids 🐛

family Aphididae

Moderate Pest affects 6 houseplants

clusters on new growth · sticky residue · honeydew

1/10 swipe ›

Bacterial Leaf Spot 🦠

Moderate Disease

water-soaked spots · yellow halos · angular spots

1/7 swipe ›

Botrytis Gray Mold 🦠

Moderate Disease affects 1 houseplant

gray fuzzy mold · brown collapsing flowers · rotting buds

1/13 swipe ›

Caterpillars and Chewing Insects 🐛

mostly order Lepidoptera larvae, plus other chewing insects

Moderate Pest

ragged holes · chewed leaves · missing leaf edges

1/2 swipe ›

Cold Damage and Frost Injury 🦠

Serious Disease

blackened leaves · water-soaked leaves · collapsed tissue

🌿Photo coming soon

Crown and Stem Rot 🦠

Serious Disease

soft stem base · mushy crown · collapsing plant

1/9 swipe ›

Downy Mildew 🦠

Serious Disease

yellow patches · gray fuzz under leaves · leaf undersides

1/9 swipe ›

Fire Blight 🦠

Serious Disease

blackened shoots · shepherd's crook · wilting blossoms

1/13 swipe ›

Fungus Gnats 🐛

family Sciaridae

Minor Pest affects 34 houseplants

tiny black flies · gnats around soil · flies when watering

🌿Photo coming soon

Leaf Scorch and Sunburn 🦠

Moderate Disease

brown crispy edges · bleached patches · scorched leaves

1/12 swipe ›

Leaf Spot 🦠

Moderate Disease

brown spots · black spots · yellow halos

1/11 swipe ›

Leafminers 🐛

various fly, moth, beetle, and sawfly larvae

Moderate Pest

winding trails · leaf mines · blotches inside leaves

1/18 swipe ›

Mealybugs 🐛

family Pseudococcidae

Moderate Pest affects 48 houseplants

white cottony fuzz · leaf axils · sticky residue

1/2 swipe ›

Phytophthora Root & Crown Rot 🦠

Serious Disease

wilting despite wet soil · crown rot · root rot

1/24 swipe ›

Powdery Mildew 🦠

Moderate Disease affects 2 houseplants

white powdery coating · dusty white patches · leaves

1/14 swipe ›

Psyllids 🐛

superfamily Psylloidea

Moderate Pest

leaf curling · distorted new growth · waxy droplets

1/11 swipe ›

Root Rot 🦠

Serious Disease affects 52 houseplants

wilting despite wet soil · yellow leaves · mushy black roots

Rust 🦠

Moderate Disease

orange powder · rusty pustules · yellow spots

1/2 swipe ›

Salt and Fertilizer Burn 🦠

Serious Disease

brown tips · leaf edge burn · white crust

1/13 swipe ›

Scale Insects 🐛

superfamily Coccoidea

Moderate Pest affects 40 houseplants

brown bumps · raised lumps on stems · sticky residue

Shore Flies 🐛

family Ephydridae

Minor Pest

small dark flies · flies on wet soil · algae on soil

1/4 swipe ›

Slugs & Snails 🐛

terrestrial gastropods

Moderate Pest

ragged holes · smooth-edged holes · chewed seedlings

Sooty Mold 🦠

Moderate Disease

black film · sooty coating · sticky leaves

Spider Mites 🐛

Tetranychus urticae (twospotted spider mite) & relatives

Serious Pest affects 44 houseplants

fine webbing · stippling · speckled leaves

Springtails 🐛

class Collembola

Minor Pest

tiny jumping bugs · white bugs in soil · moist soil

Thrips 🐛

order Thysanoptera

Serious Pest

silver streaks · black specks · distorted new growth

Whiteflies 🐛

family Aleyrodidae

Moderate Pest

tiny white flies · white insects under leaves · sticky residue