Pocket Botanist
Check these first
- Inspect the leaves for fuzzy growth or spores.
- Check if the spots are only on the side facing the sun.
- Feel the soil to see if it has been consistently soggy.
Likely causes
Fungal Leaf Spot
Most likelyHow to tell: You will see dark brown or black circular spots that may have a yellow halo. These often appear when the foliage stays wet for too long.
What to do: Remove the affected leaves immediately to stop the spread. Improve air circulation around the tree and avoid overhead watering to keep the leaves dry.
Sunburn
Most likelyHow to tell: These spots look like bleached or scorched patches on the leaves that receive the most direct light. They usually appear suddenly during peak summer heat.
What to do: Move your tree to a spot with filtered light or provide a shade cloth during the hottest part of the day. Ensure the plant is well hydrated to help it handle the heat.
Find out what's wrong with your wild jack
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
Worry if the spots are spreading rapidly to new growth or causing the entire leaf to curl and fall. A few old leaves with minor spots are normal as the tree ages.
Stopping it coming back
Keep the foliage dry by watering at the base of the tree rather than over the top. Provide plenty of space between plants to allow for good airflow.
Wild Jack: spots? Check yours with a photo
Every plant is a little different. Take a photo of your wild jack 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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Questions people ask
- Can I use a fungicide on my Wild Jack?
- Yes, a copper based fungicide can help manage fungal spots. Apply it according to the label instructions during a dry spell.
- Are these spots harmful to the fruit?
- If the spots are caused by a fungal infection, it can spread to the fruit if left untreated. Keep the tree clean and pruned to protect your harvest.
Guides to these causes
More problems with Wild Jack
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.