Why does my peace lily have brown tips?

The 4 most likely causes

The cause of peace lily brown leaf tips usually narrows to one of the items below, ranked by how often we see each in Growli's diagnostic chats. Work down the list — most readers find their answer in the top two.

1. Fluoride or chlorine in tap water (Likely)
   Peace lily is sensitive to the fluoride and chlorine added to most municipal water supplies. Minerals build up at the leaf tips and cause crispy brown edges or speckled spots. Switch to rainwater, filtered water, or tap water that has sat uncovered for 24 hours so the chlorine can off-gas.
2. Low humidity (Likely)
   Peace lily is native to humid environments and struggles when household humidity drops below 40%. The first sign is crispy brown leaf tips, followed by pale, curling foliage. A humidifier, a pebble tray, or grouping plants together raises local humidity meaningfully.
3. Fertiliser salt buildup in the soil (Likely)
   Months of feeding leave mineral salts behind in the potting mix. The salts pull water away from the finest root tips, and the damage shows up at the far end of the water pipeline — the leaf tips — as crisp brown edges that keep creeping. Flush the pot with plain water until it runs freely from the drainage hole, two or three times in a row, every couple of months during the feeding season.
4. Underwatering or letting it dry too long (Possible)
   Peace lily is a thirsty plant that wilts dramatically when it dries out. If the leaves are limp and the soil pulls away from the pot edge, it has gone too long between waterings. Soak the rootball thoroughly until water runs out the drainage hole.

Why peace lily in particular

Brown, crispy tips are the classic Spathiphyllum grievance, and the usual culprit is water chemistry rather than watering. Fluoride and chlorine from tap water travel up the transpiration stream and gather where water exits, the leaf tips, scorching this sensitive aroid over weeks. A tell-tale sign is tips browning across the whole plant at once rather than on one leaf. Dry air and salt build-up from over-feeding do the same, concentrating minerals at those thin, vulnerable tip cells.

Normal turnover, or real trouble?

A little tip browning is almost universal on peace lilies and rarely means much: a fine brown point on an older or fast-grown leaf is cosmetic, and most healthy plants carry one or two. What shifts it from routine to a signal is scale and newness. When fresh, just-unfurled leaves emerge already brown-tipped, or when the browning creeps down the margins on leaf after leaf, the plant is telling you something systemic is wrong.

How to diagnose in 60 seconds

Run these quick checks before you change anything — the right fix depends on what you find.

• Is the browning confined to the very tips and edges, or spreading inward in patches? Tips-and-edges = moisture/air/minerals; spreading patches = disease or rot.
• What water do you use? Straight tap water in a hard-water or fluoridated area is the most common brown-tip culprit for sensitive species.
• Check humidity with a cheap digital hygrometer near the plant. Below 40% is brown-tip territory for tropical foliage.
• Look for a white crust on the soil surface or the pot rim — that is fertiliser salt buildup, and the tips are where it bites.

The fix — step by step

Change the water before anything else. Switch to rainwater or distilled water, since the fluoride behind this aroid's tip-burn passes straight through carbon jug filters and does not evaporate if you let tap stand. Then flush the pot: pour clean water through until it drains, using two to three times the pot's volume, to leach out the built-up minerals. Ease off feeding, and trim brown tips on a slant that follows the leaf's natural point.

This is the recovery sequence Growli walks users through for peace lily with brown leaf tips. Work through the steps in order; skipping ahead is the most common reason a plant fails to bounce back.

1. Flush the salts out of the pot. Take peace lily to the sink and run room-temperature water through the pot until it flows freely from the drainage hole — then do it twice more. This washes out accumulated fertiliser and tap-water minerals, the most common tip-burn driver.
2. Fix the water itself. Switch to filtered water, rainwater, or tap water left uncovered for 24 hours so chlorine can off-gas. For fluoride-sensitive species this single change stops new tips browning within a leaf generation.
3. Raise the humidity around the plant. Aim for 45-55% relative humidity: a small humidifier, a pebble tray under the pot, or grouping plants together all work. Misting alone doesn't — it raises humidity for minutes, not hours.
4. Reset a steady watering rhythm. Tip burn loves a feast-famine cycle. For peace lily aim for as soon as the leaves start to droop slightly, usually every 5-7 days, checked with a finger 3-4cm down — never a fixed calendar day.
5. Trim the brown tips cleanly (optional). Brown tissue never re-greens. For looks, trim the dead tip with clean scissors following the leaf's natural shape, leaving a hair-thin line of brown — cutting into live green tissue just restarts the browning.

When this can't be saved

Most cases of peace lily brown leaf tips are recoverable, but a few red flags point to a plant that has gone past the point of return. If you spot any of these, consider propagating a clean cutting and starting over.

• The browning is marching inward past a third of the leaf on most leaves within days — that is active tissue death, not cosmetic tip burn.
• Brown tips are paired with a soft, darkening stem base — the real problem is rot below the soil, not the air above it.
• A thick salt crust keeps returning days after a full flush — the mix is saturated with minerals and needs replacing, not rinsing.

Prevention

For peace lily, the single biggest preventative is matching its native rhythm: as soon as the leaves start to droop slightly, usually every 5-7 days, medium to low indirect light, and a free-draining pot with a working drainage hole. Water with filtered, rain, or overnight-rested water if your tap is hard or fluoridated, keep a hygrometer near the plant and hold humidity above 45%, and flush the pot through with plain water every couple of months during the feeding season so salts never accumulate to burning levels.

Common questions

Related guides

• What's wrong with my plant? — the diagnosis apps compared
• Peace lily care guide — full watering, light, and feeding routine
• Is peace lily toxic to cats and dogs? — toxic to pets, per the ASPCA
• How often to water peace lily — the watering brief
• When to repot peace lily — pot size and timing
• Brown leaf tips on plants — the full diagnostic guide across species
• What's wrong with my plant? — Growli's flagship diagnosis index
• Peace lily — yellow leaves
• Peace lily — curling leaves
• Peace lily — drooping
• Monstera — brown leaf tips