Should I prune the spotted leaves?

Yes, removing infected leaves helps reduce the amount of fungus present. Always clean your shears with alcohol between cuts.

Is leaf spot contagious to other plants?

Yes, fungal spores can travel through water splashes or wind. Keep an eye on nearby plants for similar symptoms.

Slender deutzia: spots, causes and fixes

Check these first

Check if the spots are spreading to new growth.
Observe if you are watering the leaves directly.
Look at the spacing between your plant and others.

Likely causes

Leaf spot disease
Most likely
How to tell: You will see brown or black spots with yellow halos on the leaves. These spots may grow and cause the leaf to turn yellow and fall off.
What to do: Remove and dispose of all affected leaves immediately to stop the spread. Avoid overhead watering to keep the foliage dry.
Poor air circulation
Possible
How to tell: The plant is crowded by other shrubs or located in a stagnant area. The foliage stays damp for too long after rain or watering.
What to do: Prune back nearby plants to improve airflow. Ensure your Deutzia is planted in a spot that gets a light breeze.

Leaf spots on other plants

Find out what's wrong with your slender deutzia

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.

When to worry

Worry if the spots are spreading rapidly across the whole plant. A few spots after a long rainy spell are common and usually not fatal.

Stopping it coming back

Water at the base of the plant rather than over the top, and provide enough space for air to move through the branches.

Slender deutzia: spots? Check yours with a photo

Every plant is a little different. Take a photo of your slender deutzia 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.

Get the app · Or check it from a photo now, free

Questions people ask

Should I prune the spotted leaves?: Yes, removing infected leaves helps reduce the amount of fungus present. Always clean your shears with alcohol between cuts.
Is leaf spot contagious to other plants?: Yes, fungal spores can travel through water splashes or wind. Keep an eye on nearby plants for similar symptoms.

Guides to these causes

Leaf Spot

Why does my Slender Deutzia have spots on its leaves?

Check these first

Not sure what's wrong with your slender deutzia?