Why are my peace lily tips turning brown?
Brown tips are among the most common peace lily complaints, and the cause is almost always simple. Where the brown sits and how it feels tell you whether it’s dry air, thirst, tap water or too much feed.
On a peace lily, dry brown tips almost always come from dry air, repeated thirst or salts building up (from tap water or fertiliser). Soft brown patches with always-damp soil point to overwatering. Before changing everything, push a finger into the soil: that is what separates one cause from the other.
Why do peace lily tips turn brown?
The peace lily (Spathiphyllum wallisii) tells its story at the tip of the leaf. The position, feel and colour of the brown say more than any calendar:
- Thin, dry brown tips, with green leaf beside them. Dry air, repeated thirst or salts in the soil.
- Brown creeping along the leaf edge. Built-up salts or too much feed.
- Soft brown patches, soil damp. Overwatering.
- Dry, pale patches on the window side. Sunburn.
- A whole old leaf, brown and dry, near the base. Normal ageing.
Is dry indoor air to blame?
Often. The peace lily comes from humid forests, and in a home with the heating on, the air runs much drier than it would like. The leaf loses water through its tips faster than the roots can send more.
What to do.
- Keep it clear of radiators, heaters and warm air.
- Stand it beside other plants, which humidify the air around them together.
- Wipe the leaves with a damp cloth every so often.
- If enough light reaches it, a damper room, such as a bathroom with a window, suits it well.
- A tray of damp gravel under the pot (with the base kept out of the water) also keeps the air around it less dry. The peace lily prefers moderate to high humidity.
Misting helps little and wears off quickly. Changing the spot beats reaching for the spray bottle.
Do repeated faints leave brown tips?
They can. A peace lily topples when it’s thirsty and stands up again after a drink, but lack of water is a known cause of brown tips, and a tip that has dried never goes green again. If this is your case, the watering gap needs to shrink. How long the soil takes to dry varies with the spot:
| Where it lives | In July | In January |
|---|---|---|
| South- or west-facing window | 2 days | 4 days |
| East-facing window | 2 days | 4 days |
| North-facing window | 3 days | 7 days |
| Hallway or corner with no window | 5 days | 10 days |
The gap, the finger test and what to do when it flops are in how often to water a peace lily.
Does tap water burn peace lily tips?
Tap water carries minerals, chlorine and, in some places, fluoride. The peace lily is known to be sensitive to fluoride, and fertiliser adds more salts. When they pile up they scorch the leaf tips and margins. A white crust on the soil or around the rim of the pot is common.
What to do.
- Flush the soil. Water slowly and generously until it runs from the bottom, and let it drain fully. Repeat once.
- Prefer rainwater or filtered water. Leaving tap water out overnight removes only the chlorine, not the minerals or the fluoride.
- Feed only from spring to autumn, at a weak dose (a quarter of the label strength, every six to eight weeks). More is not better.
What if the brown is soft?
If the brown is soft, dark and often rimmed in yellow, suspect too much water. The soil has been wet for days, and there may be a musty smell or gnats. Roots without air rot, and the leaf stops receiving water even though the soil is soaked. Hold off watering until the top centimetres dry, empty the saucer and check the pot has a hole. For the rest of that trail, see why peace lily leaves turn yellow.
Can direct sun scorch a peace lily?
It can. Midday sun, even through glass, leaves dry, pale patches on the side facing the window. Pull the plant back or cover the pane with a sheer curtain. The peace lily doesn’t need direct sun and prefers indirect light.
Can I trim the brown tips?
Yes. With clean scissors, trim off the dry part following the leaf’s outline, leaving a thin rim of brown so you don’t cut into live green. A wholly brown leaf won’t recover: cut it off at the base. Trimming doesn’t cure the cause, so it’s only worth doing once you understand it.
Summary: which brown is this?
| What you see | Most likely cause | What to do |
|---|---|---|
| Thin, dry tips | Dry air or repeated thirst | Move away from heat, water in time |
| Brown creeping along the edge, crust on the soil | Built-up salts | Flush the soil, use rainwater or filtered water |
| Soft, dark patch | Overwatering | Stop watering, check the pot |
| Dry patch on the window side | Direct sun | Move back or filter the light |
| Whole old leaf dry | Ageing | Cut at the base |
Quick questions
Can I use tap water if I let it stand? Only the chlorine leaves; the minerals and fluoride stay. Rainwater or filtered water is better.
Will brown peace lily tips turn green again? No. Trim them, and new leaves grow without them once the cause is fixed.
What other care prevents brown tips? The right light, a pot with a hole and less dry air. They’re all on the peace lily page.
Every brown has its own story
When two causes look alike, your routine is the tiebreaker. The Verdejar app weighs the light, the pot and the logged waterings before telling you what’s going on. All the care is in how to care for a peace lily.
Sources: Royal Horticultural Society · Missouri Botanical Garden · Clemson Home & Garden Information Center · NC State Extension · UF/IFAS Extension · University of Illinois Extension · Michigan State University Extension · Encyclopaedia Britannica. The days between waterings come from the Verdejar watering engine.