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Hemp-agrimony · Eupatorium cannabinum

Why are there bugs on my Hemp-agrimony?

It is less common for Hemp-agrimony to have major pest issues, but aphids or spider mites can occasionally show up. Check the undersides of your leaves first to see if you have unwanted visitors.

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

Check these first

  1. Inspect the undersides of leaves for tiny moving specks.
  2. Look for sticky residue or fine webbing on the stems.
  3. Check if the plant is near a drafty window or vent.

Likely causes

  1. Aphids

    Most likely

    How to tell: You will see tiny green or black insects clustering on new growth or flower buds. They often leave behind a sticky residue called honeydew.

    What to do: Spray the plant with a steady stream of water to knock them off. If they persist, apply insecticidal soap once a week until they are gone.

  2. Spider Mites

    Possible

    How to tell: Look for fine webbing between stems and tiny yellow stippling on the leaves. These pests thrive when the air is very dry.

    What to do: Increase the humidity around your plant and wipe the leaves down with a damp cloth. Use neem oil spray every 7 days if the infestation continues.

Find out what's wrong with your hemp-agrimony

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

Worry if the leaves start yellowing or dropping rapidly due to the infestation. A few stray bugs are usually manageable with a quick wash.

Stopping it coming back

Keep your plant healthy with consistent watering and good airflow to discourage pests from settling in.

Keep your hemp-agrimony healthy from here

Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked. Identification and a health check are free.

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Questions people ask

Can I use dish soap to kill the bugs?
Yes, but use a very mild, non-detergent soap mixed with water. Avoid heavy degreasers that can damage the foliage.
Will these bugs spread to my other plants?
Yes, aphids and mites move quickly between neighboring plants. Isolate your Hemp-agrimony until the pests are completely cleared.

More problems with Hemp-agrimony

Back to the Hemp-agrimony guide

This article was generated with AI from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.