Are these bugs harmful to my plant?

Yes, they drain the plant of nutrients and can weaken it over time. They also leave behind a sticky substance that can lead to mold.

Should I use chemical pesticides?

Avoid harsh chemicals if possible, especially if your plant is near water. Gentle soap sprays are usually enough to handle the problem.

Why are there bugs on my marsh pennywort? Causes and fixes

Check these first

Inspect the stems closely for tiny moving insects.
Check the undersides of the leaves for sticky residue.
Look for ants, as they often farm aphids.

Likely causes

Aphid Infestation
Most likely
How to tell: You see tiny green or black insects clustered on the stems or undersides of leaves. The leaves may also look sticky from honeydew.
What to do: Spray the plant gently with a stream of water to knock the aphids off. If they persist, use a mild insecticidal soap once a week until they are gone.
Low Humidity
Possible
How to tell: The plant is in a very dry room, which attracts pests like aphids. The stems look weak and stunted.
What to do: Increase the humidity around the plant by grouping it with other moisture loving plants. You can also place it on a pebble tray filled with water.

Pests on other plants

Find out what's wrong with your marsh pennywort

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 infestation is heavy and the stems are turning yellow or dying, you need to act fast. A few stray bugs are usually manageable with a quick rinse.

Stopping it coming back

Keep the plant healthy with plenty of water and good air circulation. Check the stems regularly during dry weather.

Marsh pennywort: pests? Check yours with a photo

Every plant is a little different. Take a photo of your marsh pennywort 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

Are these bugs harmful to my plant?: Yes, they drain the plant of nutrients and can weaken it over time. They also leave behind a sticky substance that can lead to mold.
Should I use chemical pesticides?: Avoid harsh chemicals if possible, especially if your plant is near water. Gentle soap sprays are usually enough to handle the problem.

Guides to these causes

Aphids

Why are there bugs on my marsh pennywort?

Check these first

Not sure what's wrong with your marsh pennywort?