How do I save my aloe vera from root rot?

The 4 most likely causes

The cause of aloe vera root rot usually narrows to one of the items below, ranked by how often we see each in Growli's diagnostic chats. Work down the list — most readers find their answer in the top two.

1. Root rot (Most likely)
   Root rot is what happens when overwatering or poor drainage goes uncorrected. The roots turn brown and slimy, the stem softens from the base up, and the plant can no longer move water to its leaves — so paradoxically it wilts even though the soil is soaking. Unpot aloe vera now and inspect the roots; firm white roots stay, mushy brown ones get trimmed.
2. Overwatering or poor drainage (Likely)
   Aloe vera stores water in its leaves and stems, so the roots stay turgid even after long dry spells. When you water on a fixed weekly schedule the soil never fully dries, the roots suffocate, and the lower leaves go yellow and squishy. Aim for when the soil is completely dry, every 2-3 weeks.
3. No drainage hole or a too-dense potting mix (Likely)
   A pot without a working drainage hole — or a heavy, compacted mix that holds water like a sponge — rots roots even under a careful watering hand. Water needs to flow through the pot, not sit in it. Aloe vera wants a free-draining mix and a pot that empties from the bottom within a minute of watering.
4. Fungus gnats (a wet-soil warning sign) (Possible)
   Small dark flies drifting up from the soil of aloe vera are fungus gnats — their larvae live in constantly damp potting mix and nibble fine roots. The gnats themselves are a symptom: soil that stays wet enough to breed them is wet enough to rot roots. Let the top few centimetres dry out fully between waterings and the population collapses.

Why aloe vera in particular

Aloe evolved on dry, rocky Arabian hillsides where water drains away fast, so its roots expect to dry out between drinks and quickly suffocate in a mix that stays sodden. Root rot is the commonest way these plants die: the roots blacken and turn to mush, then the base softens and the leaves go limp and yellow even though the soil is wet. Healthy roots are pale and firm. A gritty, fast-draining mix and a proper dry-down between waterings are its real safeguard.

Normal turnover, or real trouble?

You cannot see aloe roots without lifting the plant, so judge by proxy: firm, upright, blue-green leaves and a mix that dries out within a week or two say the roots below are pale, plump and breathing. The picture flips when the leaves go soft, yellow or limp while the soil is still wet — turgid leaves on wet soil are healthy, but limp leaves on wet soil are the sign the roots have drowned.

How to diagnose in 60 seconds

Run these quick checks before you change anything — the right fix depends on what you find.

• Smell the soil at the drainage hole. Sour, swampy, or sulphurous = rot is active below the surface.
• Tip aloe vera out of its pot and look at the roots: firm and pale is healthy; brown, soft or sour-smelling is rot, which is the real cause behind most of these symptoms.
• Is the plant wilting even though the soil is wet? That paradox — thirsty-looking in soaked soil — is the root-rot signature.
• Check the pot itself: is there a working drainage hole, and does water actually run out of it when you water?

The fix — step by step

Unpot it straight away — the worst thing is to leave a rotting aloe sitting in wet mix. Wash the soil off, and with clean scissors cut every brown, mushy, hollow root back until only pale firm roots (or none) remain, doing the same to any softened leaf bases. Then lay the plant out somewhere dry and airy for a day or two before replanting into dry gritty mix, and hold off watering a fortnight.

This is the recovery sequence Growli walks users through for aloe vera with root rot. Work through the steps in order; skipping ahead is the most common reason a plant fails to bounce back.

1. Unpot and wash the roots today. Root rot doesn't pause. Slide aloe vera out of its pot, crumble away the wet soil, and rinse the rootball gently under lukewarm water so you can see what's left.
2. Cut every rotted root off. With scissors wiped in isopropyl alcohol, cut back to firm, pale tissue — brown, slimy, or hollow roots all go, even if that means removing most of the rootball. A few clean roots beat a potful of rot.
3. Repot into fresh, dry, free-draining mix. Use a clean pot with a real drainage hole — one size smaller if you removed a lot of roots — and a chunky mix (add perlite or bark). Old soil and an unwashed pot re-infect; bin the soil, bleach-rinse the pot.
4. Water once, then hold back. Water lightly to settle the mix, then wait until the top few centimetres are fully dry before watering again. The plant has fewer roots now — it drinks far less than before. No fertiliser until new growth appears.
5. Take an insurance cutting. If the rot was extensive, root a healthy stem cutting in water now. If the parent pulls through you have a bonus plant; if it doesn't, you haven't lost aloe vera entirely.

When this can't be saved

Most cases of aloe vera root rot are recoverable, but a few red flags point to a plant that has gone past the point of return. If you spot any of these, consider propagating a clean cutting and starting over.

• No firm, pale roots remain at all — with zero healthy roots to rebuild from, a stem cutting is the only realistic rescue.
• The rot has climbed above the soil line into the main stem or crown, which is soft and darkening from the base up.
• The soil smells foul and sewer-like — bacterial soft rot moves faster than fungal rot and is much harder to stop.

Prevention

For aloe vera, the single biggest preventative is matching its native rhythm: when the soil is completely dry, every 2-3 weeks, a bright south-facing window with several hours of direct sun, and a free-draining pot with a working drainage hole. Never let the pot stand in a saucer of drained water, add a third of perlite or bark to the mix at every repot, and make the finger test non-negotiable — rot is bred by watering the calendar instead of the soil. A yearly root check at repotting time catches trouble while it is still trimmable.

Common questions

Related guides

• What's wrong with my plant? — the diagnosis apps compared
• Aloe vera care guide — full watering, light, and feeding routine
• Is aloe vera toxic to cats and dogs? — toxic to pets, per the ASPCA
• How often to water aloe vera — the watering brief
• When to repot aloe vera — pot size and timing
• Root rot on plants — the full diagnostic guide across species
• What's wrong with my plant? — Growli's flagship diagnosis index
• Aloe vera — yellow leaves
• Aloe vera — curling leaves
• Aloe vera — drooping
• Monstera — root rot