Pocket BotanistCheck these first
- Touch the base of the stem to check for mushiness.
- Check the soil moisture level with a wooden skewer.
- Inspect the roots for signs of decay.
Likely causes
Root rot
Most likelyHow to tell: The base of the stem feels soft or mushy to the touch. The soil may smell sour or stay wet for too long.
What to do: Remove the cactus from its pot and inspect the roots for dark, slimy sections. Trim away any rotted roots and repot the plant in fresh, dry, well draining cactus soil.
Severe dehydration
PossibleHow to tell: The cactus looks shriveled or wrinkled and the soil has been bone dry for a very long time. The stem may lean because it lacks internal water pressure.
What to do: Give the plant a thorough watering until water drains from the bottom of the pot. Ensure you wait until the soil is completely dry before the next watering cycle.
Find out what's wrong with your cactus
The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.
Scan with your phone's camera to get the app
When to worry
A mushy, drooping stem is a serious sign of rot that can kill the plant quickly. A slightly wrinkled stem is usually just a sign that the plant needs a drink.
Stopping it coming back
Always use a pot with drainage holes and never let the cactus sit in standing water.
Keep your cactus healthy from here
Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked. Identification and a health check are free.
Questions people ask
- Can I save a cactus with rot?
- If the rot has reached the main stem, it is often too late. If it is only in the roots, you can trim them and repot.
- How often should I water?
- Water every 14 to 30 days, but only when the soil is completely dry.
More problems with Cactus
This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.