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Hemlock water dropwort · Oenanthe crocata

Why are there bugs on my Hemlock water dropwort?

Aphids are the most common pests for this plant, especially during dry spells. They cluster on stems and suck the sap, which weakens the plant.

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pests on a plant
Photo: Jules Verne Times Two, CC BY-SA 4.0

Check these first

  1. Inspect the stems and undersides of leaves for clusters of insects.
  2. Check for sticky residue on the leaves.
  3. Wash the plant with a gentle water spray.

Likely causes

  1. Aphid Infestation

    Most likely

    How to tell: You see small green or black insects clustered on the stems or undersides of leaves.

    What to do: Spray the plant with a gentle stream of water to knock them off. Use insecticidal soap if the infestation persists.

  2. Dry Environment

    Possible

    How to tell: The plant is in a very dry area, making it more attractive to pests.

    What to do: Increase the humidity around the plant. Ensure the soil remains consistently moist to keep the plant healthy and resistant.

Pests on other plants

Find out what's wrong with your hemlock water dropwort

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.

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When to worry

If the leaves start curling or turning yellow, the infestation is severe and needs immediate treatment.

Stopping it coming back

Keep the plant well watered and mist the foliage occasionally to discourage aphids.

Hemlock water dropwort: pests? Check yours with a photo

Every plant is a little different. Take a photo of your hemlock water dropwort 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.

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Questions people ask

Are aphids harmful to my plant?
Yes, they drain the plant of nutrients and can stunt its growth. They also leave behind a sticky substance that can attract mold.
Should I use chemical pesticides?
Try natural methods like water sprays or insecticidal soap first. Avoid harsh chemicals as they can damage the plant.

Guides to these causes

More problems with Hemlock water dropwort

Back to the Hemlock water dropwort 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.