Why are my plant's leaves turning yellow?

The most common cause is overwatering, especially if lower leaves yellow and the soil stays wet. Other causes are underwatering, too little light, a lack of nutrients and normal ageing of the oldest leaves. Check the soil moisture first, then the light.

What causes brown tips on houseplant leaves?

Brown tips usually come from dry air, irregular watering or a build-up of salts and minerals from fertiliser and hard tap water. Spider plants, calatheas, peace lilies and dracaenas are especially prone. Water more evenly, flush the soil every couple of months and use softer water.

Should I cut off yellow or brown leaves?

Yes, once a leaf is mostly yellow or brown it won't recover, and removing it keeps the plant tidy and reduces disease. Cut the leaf stalk close to the stem with clean scissors. For brown tips only, trim the dead part following the leaf's natural shape.

Why are my plant leaves curling?

Leaves curl to reduce water loss. The usual triggers are thirst, dry air, heat, too much direct sun or cold drafts. Pests such as thrips and aphids can also distort and curl new leaves.

Why does my plant have brown spots on its leaves?

Brown spots with a yellow halo often point to overwatering and root problems or a bacterial or fungal leaf spot. Dry, pale brown patches facing the window are usually sunburn. Tiny spots with fine speckling can be spider mites.

Houseplant Leaf Problems: Yellow, Brown and Curling

Houseplant leaf problems almost always have a simple cause you can read from the leaf itself. Yellow lower leaves with wet soil usually mean overwatering, crispy brown tips point to dry air or salt build-up, pale scorched patches are sunburn, curling means the plant is losing water faster than it can take it up, and speckles or webs mean pests. Match what you see in the table below, then fix the cause; the damaged leaves won't recover, but new ones will grow in healthy.

Before you change anything, slow down and check three things: is the soil wet or dry 5 cm down, how much light does the plant get, and has anything changed recently, such as a move, a new pot, heating coming on or a cold snap? Those three questions explain most leaf problems, and answering them takes less than a minute.

Leaf symptom checker

What you see	Most likely cause	Other possibilities	First thing to check
Yellow lower leaves, soft	Overwatering	Root rot, ageing	Soil moisture
Yellow leaves all over, pale	Low light or lack of nutrients	Root-bound	Light, last feed
Yellow, crispy leaves	Underwatering	Too much sun	Soil moisture
Brown crispy tips	Dry air, salts in water	Underwatering, overfeeding	Water type, humidity
Brown crispy edges	Underwatering, low humidity	Cold, sunburn	Soil, position
Brown spots with yellow halo	Overwatering, leaf spot disease	Root rot	Soil, roots
Pale, bleached, scorched patches	Sunburn	Recent move to sun	Light direction
Curling leaves	Thirst, dry air, heat	Pests, cold	Soil, then undersides
Drooping, limp	Underwatering or overwatering	Root rot, cold	Soil
Speckled, dull, webbing	Spider mites	Thrips	Leaf undersides
Silvery streaks with black dots	Thrips	–	Upper leaf surface
Sticky leaves	Scale, mealybugs, aphids	–	Stems, joints
Holes or torn leaves	Physical damage, pets	Slugs if outdoors	Recent handling
Small, pale new leaves	Low light, lack of nutrients	Root-bound	Light, pot
Leaves dropping suddenly	Shock: move, cold, big watering change	Root rot	Recent changes
Variegation fading	Too little light	–	Light
Blisters under leaves	Edema from excess water	–	Watering in cool weather

Yellow leaves

Yellowing (chlorosis) is the leaf losing chlorophyll. Where it happens tells you a lot.

Oldest, lowest leaves, one at a time: normal ageing. Nothing to worry about.
Several lower leaves at once, soil wet: overwatering. Let the soil dry more between waterings and check the roots if the stem is soft. See overwatered plant signs.
Whole plant pale yellow-green: too little light or hungry. Move closer to a window, then feed in spring and summer.
Yellow between green veins on new leaves: often iron or magnesium deficiency, made worse by hard water raising soil pH.
Yellow and crispy: underwatering or a sudden move into strong sun.

For plant-specific help, see pothos yellow leaves and monstera yellow leaves.

Brown tips and edges

Brown tips are the most common complaint with spider plants, peace lilies, calatheas, dracaenas and palms. The leaf tip is the furthest point from the roots, so it's the first place to dry out or collect excess salts.

Raise humidity if your home is dry, especially in winter.
Water more consistently. Don't let the soil swing from bone dry to soaked.
Flush the soil every two or three months by running water through the pot for a minute to wash out salts.
Use softer water (rain, filtered or distilled) for sensitive plants.
Feed less. Too much fertiliser burns tips. The fertilizer dilution calculator helps you stay at half strength.

Trim brown tips with clean scissors, cutting at an angle to copy the leaf shape and leaving a thin line of brown so you don't cut into living tissue.

Brown spots

Dark spots with a yellow ring, often spreading: overwatering, root rot or a bacterial or fungal leaf spot. Remove affected leaves, keep the foliage dry when watering, improve airflow and check the roots. See root rot treatment.
Dry, tan or white patches on the side facing the window: sunburn. Move the plant back or add a sheer curtain.
Tiny brown or black dots on the upper surface with silvery patches: thrips.
Corky bumps on the underside: edema, from taking up water faster than it can transpire. Water less in cool, dim weather.

Curling leaves

Leaves curl inward to protect themselves from losing water.

Soil dry: water thoroughly.
Soil moist: look at heat sources, air conditioning, cold drafts and direct sun.
New leaves twisted or puckered: check for aphids and thrips on growing tips.
Calathea and prayer plants: curling is a classic sign of low humidity. See calathea care.

Drooping and wilting

Drooping happens with both too little and too much water, which is why it's confusing.

	Dry soil	Wet soil
Leaves feel	Thin, soft, may crisp	Soft, limp, may yellow
After watering	Perks up within hours	Stays droopy
Fix	Soak and drain	Let soil dry, check roots

Peace lilies are the drama queens here, flopping dramatically when dry and recovering within hours of watering. See peace lily care.

Leaf drop

Sudden leaf drop is usually a shock response. Fiddle leaf figs, rubber plants and weeping figs are famous for it after a move. Keep the plant in one bright place, keep watering steady, and avoid drafts. See fiddle leaf fig care and rubber plant care.

Pests on leaves

Speckling, webbing, sticky residue and distorted new growth all point to pests. The houseplant pests guide shows you how to identify and treat each one.

Leggy plants and small leaves

Long stems with big gaps between leaves, small new leaves and a plant leaning toward the window all mean it wants more light. Use the plant light meter converter to check your spot, or the low light plant finder if you need plants that cope with less.

Problems by season

Season	Common leaf problem	Why	What to do
Winter	Brown tips, crispy edges, spider mites	Heating dries the air	Humidifier, keep away from radiators, check for mites
Winter	Yellow leaves, soft stems	Same watering, slower growth	Water less often
Spring	Pale new growth	Hungry after winter	Start feeding at half strength
Summer	Scorched patches	Strong sun through glass	Pull back from south and west windows
Summer	Curling, drooping	Heat and faster drying	Check soil more often
Autumn	Leaf drop	Falling light levels, moves indoors	Move closer to windows; check for pests

Our houseplant winter care guide goes into the cold-season changes in more detail.

A simple diagnosis routine

Feel the soil 5 cm down.
Lift the pot: heavy or light?
Look at which leaves are affected: old, new, or all.
Check under leaves and in leaf joints for pests.
Think about changes in the last two to four weeks.
Change one thing at a time and give it two weeks. If you change the light, the water and the pot all at once, you won't know what helped.

Leaf care checklist

Remove fully yellow or brown leaves
Wipe dust off leaves monthly
Flush the soil every 2–3 months
Check leaf undersides when watering
Keep plants away from heaters and cold glass
Don't move sensitive plants around

Sources and further reading

UC Statewide IPM Program: Houseplant problems, for diagnosing care and pest issues.
University of Maryland Extension: Houseplant problems, for symptom-based diagnosis.
Royal Horticultural Society: Houseplant problems, for common disorders.