Why are my plant's leaves turning brown?

Updated July 2026 · 6 min read

Brown leaves are your plant's way of telling you something specific — and where the browning appears is the clue. Crispy tips mean something different from brown edges, and both mean something different from spots in the middle of the leaf. Match your plant's pattern below and you'll usually have the answer in a minute.

First, read the pattern

• Brown tips only → dry air, underwatering, or salt build-up
• Brown edges all round → underwatering, fertiliser burn, or cold damage
• Brown patches or spots mid-leaf → sunburn or fungal disease
• Whole leaves brown and soft → overwatering or root rot
• Whole leaves brown and crispy → severe drought or scorch

1. Dry air (crispy brown tips)

The classic houseplant complaint, especially in winter when heating is on. Tropical plants like calatheas, ferns and spider plants want far more humidity than a centrally heated room provides, and their leaf tips dry out first. Fix: group plants together, stand pots on a tray of damp pebbles, or move them to a bathroom or kitchen. Trim the dead tips with scissors, following the leaf's natural shape — they won't turn green again.

2. Underwatering (tips and edges, leaves crisp and curling)

When a plant can't pull up enough water, the parts furthest from the roots — tips and edges — dry out first. The compost will be visibly dry and the pot light to lift. Fix: give the pot a long soak until water runs from the drainage holes, then get ahead of it with the finger test — our guide on how to tell if a plant needs water covers it.

3. Overwatering & root rot (soft brown leaves, from the bottom up)

Constantly wet compost suffocates roots; damaged roots can't feed the plant; leaves turn brown — often soft and dark rather than crispy, sometimes with yellowing first. The compost smells sour and stays wet for days. Fix: stop watering, move the plant somewhere brighter and check the roots — trim any that are brown and mushy, repot into fresh compost, and water only when the top few centimetres are dry. Our guide to why plants die walks through the rescue in detail.

4. Sunburn (bleached brown patches on exposed leaves)

Yes, plants get sunburn — pale, papery brown patches on the leaves facing the window or sun, appearing within a day or two of a move. Common when houseplants go outside for summer, or shade-lovers end up on a south-facing sill. Fix: move it out of direct sun. Burnt patches don't recover, but new growth will be fine. Acclimatise plants to brighter spots gradually over a week or two.

5. Fertiliser burn (dark edges, white crust on the compost)

Too much feed builds salts up in the compost, which scorch the roots and show as brown leaf edges — often with a white crust on the soil surface or pot rim. Fix: flush the pot through with plenty of plain water, let it drain fully, and skip feeding for a couple of months. Most houseplants need feed only monthly in spring and summer, at half the strength the bottle suggests.

6. Cold damage (brown or blackened patches after a cold night)

A draught from a winter window, leaves touching cold glass, or a tender plant caught by frost all show up as brown-to-black patches, sometimes translucent at first. Fix: move the plant away from draughts and glass, and wait until after your last frost before moving anything tender outside. Damaged growth can be trimmed once new leaves appear.

7. Fungal leaf spot (brown spots with yellow halos, spreading)

Distinct brown or black spots, often ringed with yellow, that multiply and merge over time — encouraged by wet leaves and still air. Fix: remove the worst-affected leaves (bin them, don't compost), water at the base rather than over the foliage, and improve airflow around the plant. Serious cases on outdoor plants may need a fungicide.