Should I use chemical pesticides?

Avoid chemical sprays, as they can harm the fish and beneficial insects in your pond. Physical removal is much safer.

Will aphids kill my plant?

They rarely kill a healthy plant, but they can ruin the flowers and make the plant look unsightly.

Common water plantain: pests, causes and fixes

Check these first

Look closely at the flower stalks for clusters of tiny insects.
Check the undersides of the leaves for any sticky residue.
Wash the plant gently with water to dislodge any visible pests.

Likely causes

Aphid infestation
Most likely
How to tell: You will see tiny green or black insects gathered on the stems and flower buds. They often leave behind a sticky residue called honeydew.
What to do: Gently spray the aphids off with a strong stream of water from your hose. If they persist, you can submerge the affected stalks underwater for a few hours to drown them.
Environmental stress
Possible
How to tell: The plant is struggling with heat or poor water quality, making it more attractive to pests.
What to do: Ensure the water level remains consistent and the plant is not drying out. Healthy plants are much better at resisting pest attacks.

Pests on other plants

Find out what's wrong with your common water plantain

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

A few aphids are usually manageable, but you should act if you see them covering the flower stalks or if the plant starts to look distorted.

Stopping it coming back

Keep the plant healthy with consistent water levels and good sunlight to help it naturally resist infestations.

Common water plantain: pests? Check yours with a photo

Every plant is a little different. Take a photo of your common water plantain 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 use chemical pesticides?: Avoid chemical sprays, as they can harm the fish and beneficial insects in your pond. Physical removal is much safer.
Will aphids kill my plant?: They rarely kill a healthy plant, but they can ruin the flowers and make the plant look unsightly.

Guides to these causes

Aphids

What are these bugs on my common water plantain?