Can I use neem oil for the spots?

Yes, neem oil is effective against both lace bugs and some fungal issues. Apply it in the evening to avoid burning the leaves in direct light.

Are these spots contagious to other plants?

If they are caused by pests, they can easily spread to nearby plants. Isolate your azalea until you are sure the infestation is cleared.

Sims azalea: spots, causes and fixes

Check these first

Look at the underside of the leaves for tiny insects.
Check if the spots are spreading to new growth.
Ensure the plant has enough space between it and other plants.

Likely causes

Lace bugs
Possible
How to tell: You will see yellow stippling on the top of the leaves and tiny black specks on the undersides.
What to do: Wipe the leaves with a damp cloth to remove the bugs. Apply insecticidal soap to the undersides of the leaves every 7 to 10 days until the pests are gone.
Fungal leaf spot
Possible
How to tell: Dark or reddish brown spots appear on the foliage, often with a yellow halo.
What to do: Remove and discard the affected leaves immediately. Improve air circulation around the plant and avoid getting water on the leaves when you irrigate.

Leaf spots on other plants

Find out what's wrong with your sims azalea

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

If the spots are covering most of the leaf surface, the plant may struggle to photosynthesize. A few small spots are usually manageable with proper care.

Stopping it coming back

Water at the base of the plant to keep foliage dry. Inspect your plant regularly for early signs of pests.

Sims azalea: spots? Check yours with a photo

Every plant is a little different. Take a photo of your sims azalea 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

Can I use neem oil for the spots?: Yes, neem oil is effective against both lace bugs and some fungal issues. Apply it in the evening to avoid burning the leaves in direct light.
Are these spots contagious to other plants?: If they are caused by pests, they can easily spread to nearby plants. Isolate your azalea until you are sure the infestation is cleared.

Guides to these causes

Leaf Spot

What are these spots on my Sims azalea leaves?

Check these first

Not sure what's wrong with your sims azalea?