The soil is moist, but the leaves are wilting. There's a faint sour smell coming from the pot. These may be signs that root rot is already underway.
I lost my very first houseplant to root rot. I was stuck in a vicious cycle — "I'm watering it and it still looks weak, so it must need more water" — and at the time, I couldn't see it.
But here's the good news: if you catch root rot early and follow the right steps, plants can often recover. In this article, we'll go through the whole process, from "something seems off" to full recovery.
How root rot happens
Roots don't just drink water — they breathe oxygen too. When soil stays wet all the time, the roots suffocate, and bacteria move in on the weakened tissue and start to rot it. That's root rot.
Almost every case comes down to one of these three causes:
- Overwatering: watering again before the soil has dried out
- Water left in the saucer: the bottom of the pot sits in water constantly
- Poorly draining soil or pot: a pot with no drainage hole, or old compacted soil
Root rot progresses slowly, which is exactly what makes it tricky — by the time you notice, it's often well advanced. For the early warning signs, see 5 signs you're overwatering your houseplants.
Step 1: Unpot the plant and check the roots
If you suspect root rot, don't hesitate — take the plant out of its pot and look at the roots directly. Judging from above the soil is unreliable; this check is the only way to know for sure.
To unpot: tap around the rim to loosen the soil, hold the base of the plant, and pull it out at an angle. If it's stuck, squeeze the sides of the pot or loosen the soil around the edge with a chopstick.
How to read the roots:
- Healthy roots: white to pale beige, firm to the touch
- Rotten roots: black to brown, soft and mushy. The outer layer slides off when you tug gently. There's a smell
If every root is black, recovery is unfortunately unlikely — but if even a few white roots remain, it's worth trying to save the plant.
Step 2: Trim the damaged roots and remove the old soil
Using clean scissors (wiped with alcohol or briefly passed through a flame), cut away all of the blackened roots. Leave any behind, and the rot will return from there. Keep as many of the healthy white roots as you can.
The old soil harbors bacteria, so gently loosen the roots and remove as much as comes away easily. You can rinse the roots with water, but for an already weakened plant that adds stress — whatever comes off by hand is enough.
If the plant has a lot of foliage, trimming back about a third of the leaves lightens the load and lets the plant put its energy into recovery.
Step 3: Repot into fresh soil
Repot into fresh, well-draining soil. Never reuse the old soil — it's a recipe for a relapse. Wash and dry the pot, or use a new one. Going one size smaller is actually a good move here: with fewer roots, a large pot holds moisture too long and raises the risk of the rot coming back.
The basic procedure is the same as in repotting basics for houseplants, with two important differences after root rot:
- Don't water right after repotting (normally you'd water thoroughly, but here letting the cut roots dry takes priority)
- No fertilizer until the plant has fully recovered
Step 4: Let it rest quietly for 1–2 weeks
After repotting, place the plant in bright shade — even softer light than behind a sheer curtain — and let it rest.
- Wait 3–5 days before the first watering, until the root cuts have dried
- After that, stick strictly to "water only once the soil has dried"
- Avoid direct sun, air conditioning drafts, and fertilizer
The sign of recovery is new growth. When a new leaf starts moving, it means the roots are working again. From there, gradually return the plant to its usual spot.
When recovery is likely — and when it's not
In my experience, it tends to go like this:
- Good odds: more than half the roots are still white / the trunk and stems are still firm / it's a resilient species like pothos, monstera, or snake plant
- Tough odds: the roots are almost entirely gone / the base of the trunk is mushy / there's a strong foul smell
If the trunk itself has gone soft, saving the whole plant is difficult — but if a healthy stem remains, you can take a cutting and grow a "child" from it. That's still a way forward.
Keeping it from coming back
Once your plant recovers, the real finish line is removing the cause:
- Settle into a rhythm of "water thoroughly, but only once the soil has dried"
- Empty the saucer every time (this one habit dramatically cuts the risk of relapse)
- Repot every 2–3 years to keep the soil draining well
The best prevention, honestly, is simply remembering when you last watered. Green Logs is a free watering tracker that runs right in your browser — it logs each plant's waterings and lets you know when the next one is coming up. Overwatering is the number one cause of root rot; a simple record is all it takes to stop it.