Can I save a plant with smut?

Smut replaces the plant's reproductive parts, so it is best to remove the affected areas. If the whole plant is covered, it is safer to discard it.

Are these spots caused by bugs?

It is possible, but usually, spots on this grass are fungal. Look for tiny insects on the underside of the leaves if you suspect pests.

Green foxtail: spots, causes and fixes

Check these first

Look closely at the seed heads for black powder.
Inspect the undersides of the leaves for signs of pests or mold.
Check if the spots are spreading to other leaves.

Likely causes

Smut fungus
Most likely
How to tell: Black, powdery spores appear on the seed heads or leaves. The plant tissue may look distorted or replaced by the fungus.
What to do: Remove and destroy any infected plant parts immediately to stop the spread. Do not compost infected material, as the spores can survive.
Fungal leaf spot
Possible
How to tell: Small, dark, or water soaked spots appear on the leaves. These spots may have a yellow halo around them.
What to do: Improve air circulation around your plant by spacing them out. Avoid getting water on the leaves when you irrigate the soil.

Leaf spots on other plants

Find out what's wrong with your green foxtail

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 you see black powdery spores, act immediately to prevent the fungus from spreading to other plants. Small, non spreading spots are usually just a minor reaction to moisture.

Stopping it coming back

Keep the foliage dry when watering and ensure your plants have plenty of space for air to move between them.

Green foxtail: spots? Check yours with a photo

Every plant is a little different. Take a photo of your green foxtail 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 save a plant with smut?: Smut replaces the plant's reproductive parts, so it is best to remove the affected areas. If the whole plant is covered, it is safer to discard it.
Are these spots caused by bugs?: It is possible, but usually, spots on this grass are fungal. Look for tiny insects on the underside of the leaves if you suspect pests.

Guides to these causes

Leaf Spot

What are these spots on my green foxtail leaves?

Check these first

Not sure what's wrong with your green foxtail?