Black or very dark brown tips on a spider plant are almost always a sign of trouble at the roots from too much water.1Mod and Mint. Why Your Spider Plant Has Black Tips and How to Fix Them The problem shows at the leaf ends even though it starts underground, because the tips are the last place water and nutrients reach.
How Too Much Water Turns the Tips Black
When the soil stays soggy, the roots become waterlogged and begin to rot.2Spider Farmer Official. What Causes Spider Plant Brown Tips? Rotting roots can no longer move water and nutrients up into the leaves.3Epic Gardening. Why Your Spider Plant Has Brown Tips (and How to Fix it) The plant ends up thirsty while sitting in wet soil.4Spider Farmer Official. What Causes Spider Plant Brown Tips? The leaf tips, farthest from the roots, are the first part to darken. If nothing changes, root rot can eventually kill the plant.5Epic Gardening. Why Your Spider Plant Has Brown Tips (and How to Fix it) Even a mild root problem can show at the tips well before the rest of the leaf looks different, so a plant can look mostly fine for weeks while the tips darken.
Spider plants are built for dry spells, which makes them easy to overwater. They have thick, fleshy roots that store water to carry them through dry seasons in the wild.6New York Botanical Garden. Research Guides: Spider plant (Chlorophytum comosum): Home Those same roots, though, are more sensitive to staying wet than people assume.7The Plant Runner. Spider Plant: A Care Guide
Plenty of owners overwater without realizing it. Browning tips look like thirst, so they water more. A pot with no drainage holes, or a saucer left full, traps water around the roots. Dense or old potting mix holds water far longer than fresh, fast-draining mix. And the plant needs less water in winter when growth slows, yet the schedule often stays the same.
A thirsty plant looks different. Underwatered tips tend to turn pale tan and crisp, not dark. Black tips often come with soil that still feels damp days after watering.
How to Check the Roots for Rot
Dark leaf tips plus wet soil is the warning combination, so the first step is to check the soil.8Mod and Mint. Why Your Spider Plant Has Black Tips and How to Fix Them Push a finger in to the second knuckle rather than judging by the surface, since the top can look dry while the lower soil around the roots stays soaked. Soil that is still wet several days after watering, especially in a pot with poor drainage, supports the case for overwatering.
Lean close and sniff, too. A healthy pot smells like fresh earth, while a sour, swampy or musty odor is another sign the roots are rotting.
If the soil and smell raise suspicion, look at the roots directly. If the soil is dry, water the plant a day earlier so the root ball slides out more easily. Then tip the pot sideways and ease the plant out. Healthy roots are firm, plump and white or pale tan. Rotten ones are brown or black and mushy, and they may slip their outer skin when pinched. Thick, swollen roots are normal water storage, not disease.
What you find tells you how serious things are. A few soft roots among mostly firm ones means the plant can recover with drier care. If most of the roots are mushy, the plant may not recover, so root some healthy baby plantlets as a backup.
How to Save a Spider Plant With Black Tips
Two changes keep the roots from drowning again. Use a fast-draining potting mix so water doesn’t linger around the roots,9Mod and Mint. Why Your Spider Plant Has Black Tips and How to Fix Them and water less often so they aren’t sitting in water between waterings.10Mod and Mint. Why Your Spider Plant Has Black Tips and How to Fix Them Because the fleshy roots store water, the plant can safely go until the top of the soil is dry.
If the roots are rotting, repot. Shake or rinse off the old wet mix so you can see every root. Cut away the soft, dark ones with clean scissors, leaving the firm ones. Choose a pot with drainage holes only slightly larger than what’s left of the root ball, and fill it with fresh houseplant mix lightened with perlite or bark. Water lightly once, then wait until the top inch dries before watering again.
Avoid a much bigger pot: it holds a large volume of soil that stays wet long after the roots have used what they can. If your plant lives in a decorative pot with no holes, keep it in a plastic nursery pot with holes inside it, and lift it out to drain after watering.
From then on, water thoroughly until it runs out the bottom, then empty the saucer. Wait until the top inch or two of soil is dry before the next round. Expect to water roughly half as often in winter as in summer. Lifting the pot helps: a light pot means dry soil, a heavy one means wait.
Existing black tips stay, but new leaves should grow in clean and green. Fresh growth from the center over the next few weeks shows the roots are recovering. Hold off on fertilizer until the plant is clearly growing again.
Should You Cut Off the Black Tips
Once a tip turns dark, it won’t turn green again,11The Spruce. 4 Reasons Why Your Spider Plant Has Brown Leaf Tips so you can cut damaged tips off without hurting the plant.12The Spruce. 4 Reasons Why Your Spider Plant Has Brown Leaf Tips If a disease might be involved, wipe your scissors with rubbing alcohol between cuts so you don’t spread it.13Plant Proper. How To Trim a Spider Plant
To keep the leaf looking natural, use sharp scissors and cut at an angle that mimics its pointed shape. Leave a thin sliver of dead tissue rather than cutting into green tissue. If most of a leaf is damaged, remove the whole leaf at the base. Trim only after fixing the cause, or new tips will keep darkening. Trimming changes only how the plant looks, so there is no harm in leaving the tips alone if they don’t bother you.
When the Tips Are Brown Instead Fertilizer and Salt Buildup
Too much fertilizer and water high in dissolved salts are recognized causes of leaf tip burn in spider plants.14KnowYourPlant Blog. Spider Plant Brown Tips: Causes and How to Fix Them Minerals build up in the potting mix over repeated watering and feeding, especially when little water drains out.15KnowYourPlant Blog. Spider Plant Brown Tips: Causes and How to Fix Them The salts then pull moisture out of the roots instead of letting the plant absorb it,16Low Light Leaf. Spider Plant Brown Tips: 9 Causes, Easy Fixes & Prevention Guide so tips can brown even when watering is right.17Epic Gardening. Why Your Spider Plant Has Brown Tips (and How to Fix it) A white crust on the soil surface, or on the outside of a clay pot, shows salts are building up.18University of Nebraska-Lincoln Extension. Clay Versus Plastic Containers
If the soil dries out normally between waterings and the roots are firm but tips still brown, salts are a likelier suspect than overwatering. A white or yellowish crust supports salt buildup, but its absence doesn’t rule it out, so treat it as a clue and not proof.
Flushing the soil means running plenty of water through the pot to carry salts out the drainage holes.19Melinda Myers. Managing Salt Buildup (white crusty substance) on Houseplant Soil Use about twice as much water as the pot holds, such as 20 cups for a 6-inch pot.20Melinda Myers. Managing Salt Buildup (white crusty substance) on Houseplant Soil It takes about five minutes per plant and can be done a few times a year.21BabaBerry. How to Flush Houseplant Soil and Clear Salt Buildup Repot instead if a crust keeps returning, symptoms come back within a couple of weeks, or the mix is two or three years old and has turned to dust.22BabaBerry. How to Flush Houseplant Soil and Clear Salt Buildup
Do it in a sink or bathtub so water can drain freely. Pour slowly in several rounds so the water passes through the soil rather than running down the sides. Let the pot drain fully, and don’t water again until the top soil dries. If you suspect root rot, skip flushing until the plant has been repotted.
Feeding is the other side of the problem. Feed only during spring and summer growth, not in winter, and use a houseplant fertilizer at half the label strength. Feeding too often or too strong shows up as brown tips or spots.
Tap Water Fluoride and Chlorine
Fluoride in water harms only a few sensitive plants, and spider plants and dracaenas are among them.23University of Minnesota Extension. How to Water Indoor Plants It can cause brown tips or brown spots on the leaves.24University of Minnesota Extension. How to Water Indoor Plants At high enough levels, it can cause yellowing, brown edges, wilting and a general decline in the plant’s health.25Ecology, Environment and Conservation. Fluoride toxicity and impact on Spider Plant leaves Letting tap water sit out does not remove fluoride.26University of Minnesota Extension. How to Water Indoor Plants Chloramine, another water treatment chemical, can cause the same brown tips.27Leaf Scan. Chlorine and Chloramine in Tap Water: Which Plants Are Sensitive and What to Do About It Fluoride damage looks much like salt burn or dry-air burn, so it’s easy to blame the wrong thing, and it can appear slowly even if you’ve used the same water for years.
Damage from tap water tends to show as steady tip browning on otherwise healthy, well-watered plants, and it continues even after watering and feeding are corrected. To test it, try rainwater or distilled water for a couple of months and watch the new leaves.
Rainwater is a good choice if tap-water tips are a problem.28University of Minnesota Extension. How to Water Indoor Plants Collect it in a clean container and use it at room temperature. Ordinary carbon pitcher filters remove less than 10% of fluoride,29SoftPro® Water Systems. Activated Carbon Remove Fluoride: Does It Work? while reverse osmosis or distilled water removes most of it.30SoftPro® Water Systems. Activated Carbon Remove Fluoride: Does It Work? Bottled distilled water is inexpensive for one or two plants, and water from a reverse osmosis system at home works too. Perlite in potting mix may release some fluoride when new, but it seems to wash out too quickly to harm plants.31N.C. Flower Growers’ Bulletin. Does Perlite Play a Role in Fluoride Toxicity of Floricultural Crops?
Dry Air and Harsh Sun
Spider plants do best at around 40 to 60 percent humidity.32Spider Farmer Official. What Causes Spider Plant Brown Tips? Very dry air, especially in winter with the heat on, can dry the tips and turn them brown.33Spider Farmer Official. What Causes Spider Plant Brown Tips? Plants near radiators or vents are hit hardest because warm, moving air dries leaf ends faster than still air. If tips brown mainly from late autumn through winter and the plant is otherwise healthy, dry air is one likely cause, though other causes are worth ruling out.
To raise humidity, group plants together so they share moisture released from leaves, and keep the plant away from heating vents and radiators. You can set the pot on a tray of pebbles and water, keeping the pot above the waterline. In very dry homes, a small humidifier is the most reliable fix.
In the wild, spider plants grow under trees that shade them from hot, bright sun.34Gardening Know How. Why Your Spider Plant Has Brown Tips & How To Fix It Plants in sunny south- or west-facing windows may scorch at the leaf ends.35Gardening Know How. Why Your Spider Plant Has Brown Tips & How To Fix It Move the plant a few feet from bright windows into bright, indirect light. Scorched tips look pale, bleached or tan, often on the side facing the window, and the damage appears quickly after a plant is moved into stronger light.
Keeping New Leaves Healthy
A seasonal rhythm makes the rest easy. In spring, check the roots, repot if the plant is crowded, and resume light feeding. In summer, water more often as growth picks up, still letting the top soil dry. In autumn, stop feeding and slow watering as light fades. In winter, water sparingly and watch for dry air from heating.