Pocket Botanist
Check these first
- Touch the top inch of soil to see if it feels wet.
- Inspect the base of the stems for soft or dark spots.
- Lift the pot to check if water is trapped in the drainage tray.
Likely causes
Overwatering
Most likelyHow to tell: The soil feels constantly damp and the base of the stems looks dark or mushy.
What to do: Stop watering immediately and let the top 2 inches of soil dry out. If the soil is waterlogged, repot the plant into fresh, well draining cactus mix and trim away any black, slimy roots.
Poor drainage
PossibleHow to tell: Water pools at the bottom of the pot or the pot lacks drainage holes.
What to do: Ensure your pot has holes at the bottom to let excess water escape. Never leave the pot sitting in a saucer full of standing water after you finish watering.
Find out what's wrong with your christmas 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.
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When to worry
If the stems are turning black or falling off at the base, the rot is advanced and the plant may be difficult to save.
Stopping it coming back
Always wait until the top inch of soil is dry before watering again, and use a porous potting mix designed for succulents.
Christmas cactus: root rot? Check yours with a photo
Every plant is a little different. Take a photo of your christmas cactus and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.
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Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Can I save a plant with root rot?
- Yes, if you catch it early. Trim off the dead roots, repot in fresh dry soil, and be very careful not to overwater while it recovers.
- How often should I water?
- Water every 7 to 14 days, but always check the soil first. If the top inch is still damp, wait a few more days.
More problems with Christmas cactus
- What are these white fuzzy spots on my Christmas Cactus?
- Why is my Christmas Cactus dropping its flower buds?
- Why are my Christmas cactus leaves turning yellow?
- Why is my Christmas cactus drooping?
- Why won't my Christmas cactus bloom?
- Why are my Christmas cactus leaf tips turning brown?
- Why does my Christmas cactus have spots on its leaves?
- Why is my Christmas cactus growing long and leggy?
Back to the Christmas cactus guide
This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.