Can a plant recover from root rot?

Yes, if some healthy roots remain. Plants with firm white or tan roots left after you trim the rot usually recover in four to eight weeks in fresh, well-draining mix. If every root is brown and mushy and the stem base is soft, take cuttings from healthy stems instead.

What does root rot look like?

Healthy roots are firm and white, tan or orange depending on the plant. Rotten roots are brown or black, soft or slimy, and the outer layer slides off when you pull gently, leaving a thin thread. The soil often smells sour or swampy.

What are the first signs of root rot?

Early signs above the soil are wilting while the soil is still wet, yellowing lower leaves, soft or dark stems at the soil line, slow growth and soil that stays wet for more than a week. Fungus gnats are often a clue that soil is staying too wet.

Should I use hydrogen peroxide for root rot?

Some growers rinse trimmed roots in a dilute solution, about one part 3 percent hydrogen peroxide to two to four parts water. There is little research on it for houseplants. The steps that matter most are removing rotten roots, using fresh mix and a pot with drainage, and watering less.

Do I need a new pot after root rot?

Use a clean pot with drainage holes. You can reuse the old one after scrubbing it with hot soapy water and rinsing. Choose a pot that fits the remaining roots, which is often smaller than the original.

What causes root rot?

Roots need oxygen. When soil stays waterlogged, roots suffocate and die, and water mould organisms such as Pythium and Phytophthora move in. Overwatering, pots without drainage, dense soil, oversized pots and cold, dim conditions all make it more likely.

Root Rot Treatment: How to Save a Houseplant Step by Step

Root rot treatment has four steps: take the plant out of its pot, rinse and cut away every brown, mushy root, repot what's left into fresh, well-draining mix in a clean pot that fits the remaining roots, and then water much less while it recovers. If no healthy roots are left, take cuttings from healthy stems and start again.

Root rot is the most common way houseplants die, and it's almost always caused by soil staying wet for too long. The plant shows thirst symptoms such as wilting and yellowing, so the natural reaction is to water more, which makes it worse. Catching it early makes all the difference.

Signs of root rot

Where	Sign	How sure can you be?
Leaves	Wilting while soil is wet	Strong sign
Leaves	Yellowing, starting with lower leaves	Moderate; also normal ageing
Leaves	Brown or black patches spreading from the base	Strong sign in fiddle leaf figs, monstera
Stem	Soft, dark or mushy at the soil line	Very strong sign
Soil	Wet for more than a week; sour smell	Strong sign
Soil	Fungus gnats	Clue that soil stays wet
Roots	Brown, black, slimy; outer layer slips off	Confirms it

The only way to be sure is to look. If you see two or more of the warning signs, take the plant out of its pot. It does no harm to a healthy plant.

Why plants get root rot in the first place

Roots don't just take up water; they also need to breathe. Soil is full of tiny air pockets, and after you water, those pockets fill up and then slowly drain and refill with air. If the soil never dries enough for air to return, roots run short of oxygen within a few days. Weakened roots then become easy targets for water moulds such as Pythium and Phytophthora, which live in most potting mixes and cause the brown, slimy decay you see.

That's why the same watering routine can be fine in summer and deadly in winter. In summer, warmth and strong light mean the plant drinks fast and the soil dries in days. In winter, the plant barely uses water, so the same amount sits in the pot for a week or more. Pot size matters for the same reason: a small root ball in a big pot is surrounded by wet soil it can't use.

Cheap moisture meters can help if you find it hard to judge, but they're often inaccurate in bark-heavy mixes. Lifting the pot to feel its weight before and after watering is a free and reliable alternative.

Healthy vs rotten roots

Healthy roots	Rotten roots
Firm when squeezed	Soft, squashy
White, cream, tan or orange (varies by plant)	Brown to black
Smell earthy or of nothing	Smell sour or rotten
Outer skin stays on when pulled	Outer skin slides off, leaving a thread
Fine root hairs present	Few or none

Note that some plants naturally have darker roots. Snake plant and ZZ roots are often orange, and many orchids have silvery-green roots. Texture is a better test than colour.

How to treat root rot, step by step

You'll need clean, sharp scissors or secateurs, fresh potting mix, a clean pot with drainage holes, newspaper, and gloves.

Unpot the plant. Tip it sideways and slide it out. If it's stuck, squeeze a plastic pot or run a knife around the inside edge.
Remove the soil. Gently shake and crumble away the old soil. Rinse the roots under lukewarm running water so you can see them clearly.
Cut out the rot. Trim every soft, brown or black root back to firm, healthy tissue. Clean your blades with alcohol between cuts if the rot is extensive.
Check the crown. If the base of the stem is soft, cut back to firm tissue. If the whole base is mushy, skip to cuttings (below).
Thin the top if roots were heavily trimmed. If you removed more than half the roots, cut back some leaves too, so the plant has less to support.
Optional rinse. Some growers dip roots in dilute hydrogen peroxide or sprinkle with cinnamon. Evidence is limited, so treat it as optional.
Let it air. For succulents, snake plants and ZZ plants, leave the roots to dry for a few hours to a day before repotting. Tropical foliage plants can go straight in.
Repot into fresh, well-draining mix in a pot just big enough for the remaining roots. Don't reuse the old soil.
Water lightly to settle the soil, or for succulents wait a few days before the first water.
Place it in bright, indirect light, warm, and out of direct sun while it recovers.

Soil and pot after root rot

Plant type	Mix	Pot
Aroids (monstera, pothos, philodendron)	2 parts houseplant mix : 1 bark : 1 perlite	Plastic or ceramic with holes
Succulents, snake plant, ZZ	1 part compost : 1 part grit or pumice	Terracotta
Ferns, calathea, peace lily	3 parts houseplant mix : 1 perlite	Plastic with holes
Ficus (fiddle leaf fig, rubber plant)	2 parts houseplant mix : 1 bark : 1 perlite	Plastic or terracotta

Use the soil mix calculator to work out quantities and the repotting pot size calculator to pick a pot that matches the root ball, not the plant's old pot.

Aftercare: the first six weeks

Watering: wait until the soil is drier than you'd normally let it get. For aroids, the top 5 cm; for succulents, completely dry.
No fertiliser for at least four to six weeks. Damaged roots can't handle salts.
Light: bright, indirect light helps the soil dry and fuels new roots.
Warmth: 18–24°C speeds recovery.
Expect a few more leaves to yellow and drop. Look for new growth as the real sign of recovery.

When to take cuttings instead

If the roots are almost all gone or the stem base is rotten, cuttings are the better bet.

Cut healthy stems well above any soft or discoloured tissue.
For vining plants (pothos, philodendron, monstera), include at least one node.
Root them in water or moist perlite. See our propagation guide.
For succulents, let leaf or stem cuttings callus for a few days, then lay them on dry gritty mix.

How to prevent root rot

Water by feel, not by day of the week. Read how to water houseplants.
Use pots with drainage holes, and empty saucers and cover pots after watering.
Don't oversize pots. Go up only 2–5 cm at a time.
Use a free-draining mix with bark or perlite.
Water less in winter, when light and growth drop.
Give plants enough light. Plants in dim corners use less water.

Root rot and specific plants

Plant	What to watch	Guide
Snake plant	Mushy leaf bases, falling leaves	Snake plant care
Monstera	Yellow leaves, black stem base	Monstera yellow leaves
Pothos	Yellow leaves, limp vines	Pothos yellow leaves
Fiddle leaf fig	Dark brown spots from leaf centre	Fiddle leaf fig care
String of pearls	Bare top, mushy pearls	String of pearls care
Peace lily	Drooping that doesn't recover after watering	Peace lily care

Sources and further reading

Royal Horticultural Society: Root rots, for causes and organisms involved.
UC Statewide IPM Program: Houseplant problems, for overwatering and root health.
University of Maryland Extension: Houseplant root problems, for diagnosing wet-soil issues.

Not sure whether your plant is over- or underwatered? Read overwatered plant signs.