Should I throw away the plant if it has spots?

Not necessarily. Most cases are treatable if caught early by removing infected leaves and improving airflow.

Does this fungus spread to other plants?

Yes, powdery mildew spores travel easily through the air. Keep infected plants isolated until they are healthy again.

Horned Violet: spots, causes and fixes

Check these first

Rub the spot to see if it wipes off like dust.
Check if the spots are spreading to other leaves.
Ensure the plant has enough space for air to move around it.

Likely causes

Powdery Mildew
Most likely
How to tell: You will see a white, flour-like dusting on the surface of the leaves. It often starts on older leaves and spreads upward.
What to do: Remove the most heavily infected leaves immediately to stop the spread. Improve air circulation by spacing your plants further apart and avoid overhead watering.
Water Splashing
Possible
How to tell: Small, light spots appear after watering, often looking like mineral deposits. These spots do not spread like fungus.
What to do: Water at the base of the plant rather than over the leaves. Wipe the leaves gently with a damp cloth to remove the mineral buildup.

Leaf spots on other plants

Find out what's wrong with your horned violet

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 white powder covers most of the foliage, the plant will struggle to photosynthesize. Minor spots are easy to manage with better airflow.

Stopping it coming back

Water in the morning so the foliage stays dry throughout the day. Give your plants plenty of room so they do not touch each other.

Horned Violet: spots? Check yours with a photo

Every plant is a little different. Take a photo of your horned violet 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 plant if it has spots?: Not necessarily. Most cases are treatable if caught early by removing infected leaves and improving airflow.
Does this fungus spread to other plants?: Yes, powdery mildew spores travel easily through the air. Keep infected plants isolated until they are healthy again.

Guides to these causes

Powdery Mildew

What are these white spots on my Horned Violet?

Check these first

Not sure what's wrong with your horned violet?