Brown leaf tips and crispy brown edges are mostly a water, root or mineral problem rather than a disease — and the exact texture and position tell you which. Crisp, dry brown means the leaf lost water faster than the roots could resupply it; soft, dark brown means the roots themselves are failing. Reading that difference is the whole diagnosis.
The short answer
On most houseplants, brown crispy tips come from dry air, inconsistent watering, or a build-up of fertiliser salts and tap-water minerals. Brown soft edges over wet soil point instead to root rot. Fix the cause; the browned tissue itself will not turn green again, but you can stop it advancing and trim it off.
How to identify the cause
- Only the very tips, crisp and dry → low humidity or mineral/salt build-up.
- Whole edges browning, soil dries fast → underwatering or a root-bound pot.
- Soft, dark brown edges, soil stays wet → overwatering / root rot.
- Brown patches on the sun-facing side → scorch or sunburn.
- Brown following a feed → fertiliser burn.
Water and humidity causes
The commonest cause is the plant transpiring faster than its roots supply water, which dries the thinnest tissue — the tips — first. Erratic watering (long dry spells punctuated by floods) makes it worse. Water consistently, before the mix is bone dry, per how to water houseplants. Tropical plants from humid forests (calatheas, marantas, ferns, palms) brown at the tips in dry indoor air; raise humidity with grouping, a pebble tray or a humidifier — see increasing humidity.
Salt and mineral build-up
Fertiliser salts and minerals in tap water (notably fluoride and chloride) accumulate in the mix and burn leaf margins — the classic brown-tipped spider plant, dracaena, calathea or prayer plant. Flush the pot occasionally by running water through it several times to leach salts, ease off feeding (see fertilizing), and switch sensitive plants to rainwater, distilled or filtered water.
Root and soil causes
If edges brown while the soil stays wet, the roots are the problem: waterlogged soil rots them and a damaged root system cannot move water, so the leaf margins dry as if droughted — see root rot and overwatering vs underwatering. A root-bound plant dries out too fast to keep its margins hydrated and needs repotting.
Heat, sun and cold causes
Fierce sun, hot dry drafts from heating vents, and cold drafts from windows all desiccate leaf edges. A plant pressed against hot summer glass scorches on that side (see leaf scorch and sunburn); one over a radiator crisps from below. Move the plant off the stress point.
What to do now, and what not to do
Diagnose by texture: crisp and dry → address watering, humidity or salts; soft and dark → stop watering and check the roots. Trim dead tissue with clean scissors, cutting just inside the brown following the leaf’s natural shape. Do not respond to brown tips by watering more without checking the soil — if the cause is rot or salts, extra water compounds it — and do not keep feeding a salt-burned plant.
Prevention and when it is minor
Consistent watering, appropriate humidity for the species, periodic flushing of the mix, and moderate feeding prevent most tip burn. A single browned tip on an otherwise healthy plant is cosmetic and common, especially on long, strappy leaves that show every stress event; widespread or advancing browning is what warrants action. Related: yellow leaves.
Quick diagnostic logic
- Tips only + dry indoor air + tropical plant → low humidity; group plants or run a humidifier.
- Tips brown on a plant you feed often, soil looks salty/crusty → fertiliser-salt or mineral build-up; flush the pot.
- Whole margins brown + light dry pot → underwatering or root-bound; water deeply / repot.
- Soft dark margins + heavy wet pot → overwatering / root rot; stop watering, check roots.
- Brown appeared within a day or two of feeding → fertiliser burn; flush and skip the next feed.
Fertiliser burn versus mineral build-up
Both are “salt” problems but they differ in timing. Fertiliser burn is acute: brown, scorched tips and margins appearing soon after a feed that was too strong or applied to dry soil. Mineral build-up is chronic: a slow accumulation of fertiliser residue and hard-water minerals (calcium, fluoride, chloride) over months, often with a white crust on the soil surface or pot rim. The fix for both is to leach the pot — run water through the mix several times until it drains freely from the base — then feed more weakly and, for sensitive species, water with rain or filtered water. See how and when to fertilize.
Plant-group notes
Spider plants, dracaenas, cordylines and calatheas/prayer plants are famously sensitive to fluoride and chloride in tap water and show brown tips first — use rainwater or distilled. Ferns, marantas and palms brown at the tips mainly from dry air (see increasing humidity). Succulents and cacti rarely get classic brown tips; brown, soft patches on them usually mean overwatering, while dry brown scabbing is often sun or cold. Big thin-leaved plants (banana, calathea) tear and brown at the edges from handling and drafts as much as from watering.
How far to trim, and will it come back
Browned tissue is dead and will not turn green again, so trim it for appearance: with clean scissors, cut just inside the brown, following the leaf’s natural point or curve so the trim is inconspicuous, leaving a sliver of brown rather than cutting into green (which just creates a new brown edge). Only fixing the underlying cause stops fresh leaves browning. Judge success by whether new leaves emerge clean.
Related plant problems
◀ Back to the Plant Problems hub to diagnose by symptom, pest or disease.
- Why leaves turn yellow
- Wilting and drooping
- Leaf scorch and sunburn
- Transplant shock
- Leggy growth (etiolation)