Is rust fungus harmful to me?

It is not harmful to humans, but it will ruin the appearance and health of your perilla.

Should I throw the whole plant away?

Only if the infection is severe and covers most of the plant. Usually, removing the infected leaves is enough.

Perilla: spots, causes and fixes

Check these first

Look at the undersides of the leaves for reddish brown dust.
Check if you have been watering the leaves directly.
Ensure the plant has enough space for air to move around it.

Likely causes

Rust fungus
Most likely
How to tell: Small, reddish brown, powdery pustules appear on the undersides of the leaves.
What to do: Remove and discard the affected leaves immediately to stop the spread. Improve air circulation around the plant and avoid getting water on the leaves when watering.
Overhead watering
Possible
How to tell: Water spots or irregular brown patches appear after you have watered the foliage directly.
What to do: Switch to watering only the soil at the base of the plant. Keep the leaves dry to prevent fungal growth.

Leaf spots on other plants

Find out what's wrong with your perilla

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

Rust can spread quickly and weaken the plant, so remove infected leaves as soon as you see them. Small, isolated spots are manageable.

Stopping it coming back

Water at the base of the plant and ensure good airflow to keep foliage dry.

Perilla: spots? Check yours with a photo

Every plant is a little different. Take a photo of your perilla 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

Is rust fungus harmful to me?: It is not harmful to humans, but it will ruin the appearance and health of your perilla.
Should I throw the whole plant away?: Only if the infection is severe and covers most of the plant. Usually, removing the infected leaves is enough.

Guides to these causes

Rust

Why does my perilla have spots on its leaves?

Check these first

Not sure what's wrong with your perilla?