Should I throw away the fallen leaves?

Yes, always rake up and discard fallen leaves. They can harbor fungal spores that will reinfect your plant next season.

Can I use a fungicide?

A copper based fungicide can help slow the spread of leaf spot. Apply it according to the label instructions during humid weather.

Rose mallow: spots, causes and fixes

Check these first

Check if the spots are only on the lower leaves or the whole plant.
Look for sunken areas or lesions on the stems.
See if the leaves are staying wet for long periods after rain.

Likely causes

Leaf spot
Most likely
How to tell: You will see small, dark, or discolored spots on the leaves that may have a yellow halo. Over time, these spots can grow and cause the leaf to turn yellow and drop.
What to do: Remove and destroy all infected leaves immediately to stop the spread. Improve air circulation around the plant and avoid overhead watering.
Cankers
Possible
How to tell: Look for sunken, discolored areas on the stems. These can girdle the branch, causing the leaves above the spot to wilt and develop spots.
What to do: Prune out the infected branches well below the sunken area. Sterilize your shears with alcohol between cuts to prevent spreading the fungus.

Leaf spots on other plants

Find out what's wrong with your rose mallow

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 or if the stems are showing signs of decay. A few spots are common in late summer, but widespread spotting can weaken the plant.

Stopping it coming back

Water at the base of the plant to keep the foliage dry. Space plants out to ensure good airflow and prevent fungal growth.

Rose mallow: spots? Check yours with a photo

Every plant is a little different. Take a photo of your rose mallow 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 throw away the fallen leaves?: Yes, always rake up and discard fallen leaves. They can harbor fungal spores that will reinfect your plant next season.
Can I use a fungicide?: A copper based fungicide can help slow the spread of leaf spot. Apply it according to the label instructions during humid weather.

Guides to these causes

Leaf Spot

What are these spots on my Rose Mallow leaves?

Check these first

Not sure what's wrong with your rose mallow?