Fungal disease
Aloe Anthracnose
A fungal disease that leaves sunken brown or black spots on aloe leaves, usually after the leaves stay wet for too long.
Symptoms
- Sunken, brown to black spots, often with a reddish-brown edge
- Spots that grow and merge, softening the leaf around them
- Pinkish or orange spore masses in damp conditions
What causes it
Anthracnose fungi spread in splashing water and thrive in warm, humid conditions with wet leaves and poor air flow.
What you can do
- Remove badly affected leaves with clean scissors and bin them rather than composting.
- Water the soil, not the leaves, and water in the morning so any splashes dry quickly.
- Let the potting mix dry out between waterings; aloe needs a gritty, fast-draining mix.
- Keep the plant in bright light with good air movement.
Not sure it's anthracnose?
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General guidance only, not a diagnosis. Check product labels and local rules before using any treatment, and ask a horticultural specialist if a valuable plant is struggling. See the disclaimer.