Pocket Botanist
Check these first
- Check if the spots are soft or firm to the touch.
- Observe if the spots are spreading to new leaves.
- Ensure the plant is not sitting in a humid, stagnant area.
Likely causes
Fungal Infection
Most likelyHow to tell: Small, dark, or sunken spots appear on the leaves, sometimes with a yellow halo.
What to do: Remove the affected leaves with a clean, sharp knife to stop the spread. Improve airflow around the plant and ensure you only water the soil, not the leaves.
Water Splashing
PossibleHow to tell: Spots appear after you have watered the plant from above.
What to do: Always water at the base of the plant near the soil line. If you accidentally get water on the leaves, gently blot it off with a paper towel.
Find out what's wrong with your prickly aloe
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 spots are rapidly turning into large, mushy patches, the infection is aggressive and requires immediate leaf removal.
Stopping it coming back
Keep the leaves dry and provide plenty of bright, direct sunlight to help the plant stay resilient.
Prickly Aloe: spots? Check yours with a photo
Every plant is a little different. Take a photo of your prickly aloe 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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Should I use a fungicide?
- Usually, removing the infected leaves and fixing the watering habits is enough. Fungicides are rarely needed for home plants.
- Are these spots just scars?
- If the spots are dry, hard, and not spreading, they are likely just old scars from past damage.
More problems with Prickly Aloe
Back to the Prickly Aloe 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.