Brown tips are the spider plant's signature complaint, and most mature plants have them somewhere. Blame the shape of the leaf. Each one is a long strap, and the tip sits at the far end of the plumbing: last in line for water, and where whatever the plant drew up out of the pot ends up concentrated. Online you'll be told tap water is the cause, fluoride in particular. It plays a part, a smaller one than its reputation suggests. Two things beat it: minerals building up in the pot, and the plant running short of water, whether that's dry soil or dry air. Extension guides don't agree on which of those leads, so check both. Start with the pot, because that's the one you can confirm by looking. The spider plant care guide covers the day-to-day side if that's what brought you here.
Read the pattern first
Tip burn from any cause looks much the same up close, usually a dry brown point with a narrow yellow band above it. What tells you the cause is the pot, the room, and how many leaves are involved.
| What you see | Most likely cause | First move |
|---|---|---|
| White crust on the soil or pot rim, or a pot you've fed for a year without flushing | Salt buildup | Flush the pot, then ease off fertilizer |
| Pot light and dry well below the surface, or water runs straight through | Underwatering | Soak the root ball, then water more thoroughly |
| Pot dries out within a day or two of a thorough watering | Root-bound | Repot one size up |
| Brown tips through the heating season, plant near a radiator or vent | Dry air | Move it, then raise the humidity |
| Pale, washed-out leaves in a bright window | Too much direct sun | Move it back from the glass |
| Browning spreading into wide patches, soil damp for a week at a time | Root rot | Check the roots |
| A few oldest, lowest leaves browning back entirely | Normal aging | Nothing |
Whole leaves yellowing, rather than tips browning, is a different problem. That's usually watering or light, not anything concentrating at the tip.
Start here: salt buildup in the pot
Minerals arrive with every watering and more with every feed. The water evaporates and they don't. Over a year or two in a pot that never drains properly, the concentration climbs high enough to pull water back out of the roots instead of letting it in, so the plant runs short even though the soil is damp. A whitish crystal crust on the soil or around the rim settles it, and it doesn't matter whether the salts came from feeding or from hard water, because the fix is the same.
To flush the pot:
- Take off the top half inch to inch (1–2.5 cm) of mix, crust and all.
- Stand the pot in a sink where water can run away freely, out of its saucer or cachepot.
- Pour room-temperature water through slowly, at least twice the volume of the pot, and not softened water. If the mix has dried hard and the water channels down the side, soak the pot in a few inches of water for half an hour first.
- Top it back up with fresh mix, wash the saucer, and let the root ball dry to the touch before watering again.
Going forward, water thoroughly enough that some runs out of the bottom every time, and tip out whatever collects underneath. Repeat the full flush every four to six months. Feed sparingly too: every three to four months, or monthly at half the label strength through spring and summer, stopping over winter. Heavy feeding costs you plantlets as well as browning the tips.
The tap water question, honestly
Search this problem and you'll be told within two clicks that fluoride is the cause and distilled water is the cure. The research is messier.
Fluoride toxicity in foliage plants is real and well documented, and spider plant is one of the species named in it. The concentrations are what's in question. US water systems fluoridate at around 0.7 ppm. In a University of Florida trial on the variegated 'Vittatum' spider plant, more fluoride produced tip damage under heat and bright light, and none at all in cooler, dimmer conditions. A grower trial in the trade press fed spider plants extra fluoride and got no tip burn at all. Extension guidance still lists fluoride and chlorine among the causes, though, and some owners do see an improvement after switching water, so the sources genuinely don't line up.
You can't settle it by looking at your own plant either, because fluoride burn and ordinary salt burn are the same brown tip. Flush the pot first because it's free and fixes the wider problem. If you've flushed, cut the feeding, and sorted the watering and the room, and new leaves still come in brown-tipped, then buy the distilled water. Three things to know before you do:
- Rainwater and distilled water are both free of fluoride and of the fertilizer salts that build up in a pot, though water off a roof picks up its own dust on the way down.
- A carbon pitcher filter won't do it. Brita-style filters are built for taste, chlorine, and metals, and their performance sheets don't claim fluoride at all. Removing it takes reverse osmosis, distillation, activated alumina, or bone char.
- Softened water is the one to stop using outright. Softeners swap calcium and magnesium for sodium, so every watering adds salt to a problem that's already about salt. Draw from an outdoor tap or a line upstream of the softener instead.
If you're troubleshooting a calathea alongside this, calathea leaves curling covers the water-quality side for that plant.
Underwatering, including the kind that looks like watering
Those thick, fleshy roots hold a reserve, so a spider plant rides out a dry spell better than most houseplants. Push past it and the tips go first. The usual culprit is a splash every few days that wets the top inch and never reaches the bottom of the pot. Slide a wooden skewer down to the base and see how far up it comes out damp.
Worse is the pot that has dried hard and stopped taking water in. Pour some on and it runs down the gap between soil and pot and straight out of the drainage hole, so the pot feels watered while the root ball stays dry. Soil pulled away from the sides is the giveaway. Stand the pot in a couple of inches (5 cm) of water for 20 to 30 minutes to rewet it from below, then drain. The same trap catches plenty of other plants, and overwatered or underwatered? has the general check.
Root-bound, and drying out faster than you notice
Those roots expand fast, and a plant left in the same pot for a couple of years is often a solid mass of them with barely any soil left between. Such a pot holds almost no water, so it swings from wet to bone dry within a day or two even though your watering hasn't changed, and whatever you feed it ends up concentrated in a tiny volume of mix. Check for roots pushing out of the drainage holes or lifting the root ball above the rim, and weigh the pot two days after a thorough watering.
Repot one size larger. Spring and summer are the easy choice, but a spider plant takes it any time of year, so don't wait months with roots bursting out. Don't jump several sizes either: the surplus soil the roots can't reach stays wet long after the root ball has drunk its fill, which trades a drying problem for a rotting one.
Dry air, heat, and too much sun
Dry air pulls water out of the leaf faster than the roots can replace it, and the tip is furthest from the supply. Heated rooms in winter, and anything over a radiator or in front of a forced-air vent, are the usual settings. Some extension guides put this at the top of the list for spider plants, ahead of salts, so don't skip it because you've flushed the pot. Moving the plant off the heat source, or into a bathroom or kitchen with decent light, is often enough. If the room stays dry all winter and the tips keep coming, a humidifier is what actually holds the humidity up.
Light and temperature are simpler. Give a spider plant bright, indirect light: it takes some direct sun but not midday sun through glass, which bleaches the variegation and scorches the tips. Days around 65–75 °F (18–24 °C) suit it, and it will sit out nights down to about 50–55 °F (10–13 °C) without complaint. Below roughly 50 °F (10 °C) it starts to suffer, so keep it back from a cold windowpane.
Less common causes worth ruling out
- Root rot. A pot with no drainage hole, or one left standing in its saucer, drowns the roots. The tell is soil that stays wet for a week or more and browning that spreads well past the tips. Slide the plant out: healthy spider plant roots are firm and white, rotted ones brown, soft, and coming apart between your fingers. Trim those off, repot into fresh mix, and hold off on fertilizer while it puts out new roots. The same wet-soil trap catches snake plants.
- Normal aging. The oldest leaves, lowest down and on the outside, eventually brown and die back. One or two at a time, on a plant that's otherwise growing well, is nothing to fix.
- Pests. Rarely the cause of tip browning on their own, but the warm, dry air that browns tips is what spider mites like, so the two turn up together. Scale, mealybugs, aphids, and whiteflies show up too. Check where the leaves meet the crown and the undersides of the arching leaves for anything sticky, cottony, or finely stippled.
Should you cut the tips off?
It's cosmetic, and the plant is indifferent. Cut with clean scissors at an angle following the leaf's taper, leaving a sliver of brown rather than cutting into green tissue, since the fresh cut dries to a fine brown line of its own. Old tips stay brown whatever you fix, so judge your progress by the leaves that come next.
The quick checklist
- White crust on the soil or pot rim → flush the pot, then feed less.
- No crust, but you've fed it regularly or never flushed it → flush it anyway. It costs nothing to rule out.
- Dry well below the surface, or water runs straight through → soak the root ball and water more thoroughly from now on.
- Pot dries out within a day or two, roots out of the drainage holes → repot one size up.
- Dry room through the heating season → move it off the heat, then raise the humidity if the tips keep coming.
- Bleached, washed-out leaves in a bright window → pull it back from the glass.
- Soil damp for a week at a time, browning spreading past the tips → check the roots.
- All of that sorted and new leaves still come in brown-tipped → stop using softened water if you are, and switch to rainwater or distilled.
Common questions
Will brown spider plant tips turn green again?
No. That tissue is dead and stays dead. What you're watching for is whether the browning stops spreading and whether the new leaves come in clean. Those two things tell you the fix worked, not the state of the old tips.
How long before I know whether the fix worked?
Give it a few weeks and judge by the new leaves. Existing tips stay brown whatever you change, so the two things to watch are whether the browning on current leaves stops advancing and whether the leaves that unfurl next come in clean to the point. A spider plant in good light puts out new growth fast enough that you won't be waiting long.
Are brown tips a sign my spider plant is unsafe for my cat?
No. Spider plants are listed as non-toxic to cats and dogs by the ASPCA, and brown tips don't change that. Any plant can cause mild stomach upset if a pet eats enough of it, but there's no toxin involved here.
My spider plant is covered in babies and the tips are browning. Are the two connected?
Not directly, though they often travel together. A plant throwing lots of plantlets has usually been in its pot a while, and a pot packed solid with roots holds very little water and dries out between waterings faster than you expect. It also concentrates whatever you feed it into less and less soil. The plantlets aren't doing the damage. They're a sign the plant is well established, which is the same thing that makes the pot too small.
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This article was researched and written with AI assistance and reviewed by a human editor before publishing. How we use AI