Pocket Botanist
Check these first
- Check if the spots have a white, powdery texture.
- Look for signs of moisture trapped on the leaves.
- Ensure the plant has enough space for air to move around it.
Likely causes
Powdery Mildew
Most likelyHow to tell: A white, flour like substance appears on the leaves and stems. It often happens when air circulation is poor.
What to do: Improve airflow by spacing plants further apart. You can wipe leaves with a mixture of one part milk to nine parts water or use a mild fungicide.
Fungal Leaf Spot
PossibleHow to tell: Dark brown or black spots appear on the leaves, sometimes with a yellow halo. These spots often grow larger in humid conditions.
What to do: Remove the affected leaves immediately to stop the spread. Avoid overhead watering to keep the foliage dry.
Find out what's wrong with your siberian rocket
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
Small, isolated spots are usually manageable with pruning. If the spots cover most of the foliage, the plant may struggle to photosynthesize.
Stopping it coming back
Water at the base of the plant rather than over the leaves to keep them dry. Provide plenty of space between plants to encourage good airflow.
Siberian rocket: spots? Check yours with a photo
Every plant is a little different. Take a photo of your siberian rocket 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
- Is powdery mildew fatal?
- It is rarely fatal if caught early, but it can weaken the plant over time. Treat it promptly to keep your rocket healthy.
- Can I compost the spotted leaves?
- It is better to throw them in the trash. Composting might not get hot enough to kill the fungal spores.
Guides to these causes
More problems with Siberian rocket
- Why is my Siberian rocket getting so leggy?
- Why is my Siberian rocket drooping?
- Why is my Siberian rocket suffering from root rot?
- Why are my Siberian rocket leaves turning yellow?
- Why are the tips of my Siberian rocket turning brown?
- Why is my Siberian rocket losing its leaves?
- Why is my Siberian rocket not blooming?
- What are these bugs on my Siberian rocket?
Back to the Siberian rocket 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.