Can I use a fungicide on my fern?

You can use a copper-based fungicide if the infection is severe. Always follow the label instructions carefully as ferns can be sensitive to chemicals.

Are these spots bugs?

Some spots might actually be scale insects, which look like small brown bumps. If you can scrape them off with your fingernail, they are likely pests.

Evergreen wood fern: spots, causes and fixes

Check these first

Look closely at the spots to see if they are fuzzy or have a distinct border.
Check if the air around the plant is stagnant.
Inspect the undersides of the fronds for pests.

Likely causes

Fern Anthracnose
Most likely
How to tell: Small, dark, or irregular spots appear on the fronds, often with a yellow halo. This is common when the plant stays wet for too long without air movement.
What to do: Remove and discard the affected fronds immediately to stop the spread. Improve air circulation around the plant by moving it to a spot with a gentle breeze.
Water Splashing
Possible
How to tell: Small, scattered brown spots appear after you water the plant. This is usually just physical damage from water hitting the leaves too hard.
What to do: Water the soil directly at the base of the plant rather than pouring water over the fronds. This keeps the foliage dry and prevents fungal growth.

Leaf spots on other plants

Find out what's wrong with your evergreen wood fern

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 spreading rapidly across the entire plant, it is likely a fungal infection that needs immediate attention. Small, isolated spots are usually manageable.

Stopping it coming back

Ensure your fern has good airflow and avoid getting water on the fronds when you irrigate.

Evergreen wood fern: spots? Check yours with a photo

Every plant is a little different. Take a photo of your evergreen wood fern 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 a fungicide on my fern?: You can use a copper-based fungicide if the infection is severe. Always follow the label instructions carefully as ferns can be sensitive to chemicals.
Are these spots bugs?: Some spots might actually be scale insects, which look like small brown bumps. If you can scrape them off with your fingernail, they are likely pests.

Why are there spots on my Evergreen wood fern?