Check these first
- Examine the undersides of the leaves with a flashlight.
- Look for tiny black specks on the leaf surface.
- Check nearby plants for similar signs of damage.
Likely causes
Thrips
Most likelyHow to tell: You see tiny, slender insects or small black dots of waste on the leaves. The leaves may look dull or have silvery patches.
What to do: Wipe the leaves down with a damp cloth to remove as many pests as possible. Treat the plant with insecticidal soap or neem oil every 7 days until the infestation is gone.
Poor Air Circulation
PossibleHow to tell: The plant is in a very stagnant corner with no airflow.
What to do: Move the plant to a spot with better air movement. Gently wipe the leaves regularly to keep them clean and discourage pests from settling in.
Find out what's wrong with your swiss cheese plant
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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
When to worry
Thrips can spread quickly to other plants, so isolate your Monstera as soon as you see them. If the damage is widespread, it may take several weeks of treatment to clear.
Stopping it coming back
Inspect your plants weekly for any signs of pests. Keep your plant healthy with proper light and water to help it resist infestations.
Swiss cheese plant: pests? Check yours with a photo
Every plant is a little different. Take a photo of your swiss cheese plant 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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Are thrips hard to get rid of?
- They can be persistent because they lay eggs inside the leaf tissue. You must be consistent with your treatments for several weeks to break their life cycle.
- Should I throw the plant away?
- Not unless the infestation is extremely severe. Most Monsteras can recover with consistent cleaning and treatment.
Guides to these causes
More problems with Swiss cheese plant
- How do I fix root rot in my Swiss cheese plant?
- Why are my Swiss cheese plant leaf tips turning brown?
- Why are my monstera's leaves turning yellow?
- Why is my monstera growing so leggy?
- Why is my monstera drooping?
- Why is my Monstera deliciosa losing leaves?
- Why does my Monstera have spots on its leaves?
- Why are my Monstera leaves curling?
Back to the Swiss cheese plant guide
This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.

