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Lady fern · Athyrium filix-femina

Why are there bugs on my Lady fern?

It is less common for Lady ferns to get pests, but they can occasionally show up if the plant is stressed by dry air or poor airflow. Check the undersides of the fronds first to see what you are dealing with.

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

Check these first

  1. Inspect the undersides of the fronds for tiny moving specks.
  2. Check the soil surface for small flying insects.
  3. Look for sticky residue on the leaves.

Likely causes

  1. Aphids

    Possible

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

    What to do: Gently wash the fronds with a soft cloth and mild soapy water. You can also spray the plant with neem oil once a week until they are gone.

  2. Fungus Gnats

    Possible

    How to tell: Small black flies will hover around the soil surface when you water. This usually happens if the soil stays too wet for too long.

    What to do: Let the top inch of soil dry out slightly between waterings. Use yellow sticky traps to catch the adults and treat the soil with mosquito bits.

Pests on other plants

Find out what's wrong with your lady fern

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 infestation is heavy and the fronds are turning yellow or wilting, you need to act fast. A few stray bugs are usually manageable with simple cleaning.

Stopping it coming back

Keep your fern in a spot with good air circulation and avoid letting the soil stay soggy for extended periods.

Lady fern: pests? Check yours with a photo

Every plant is a little different. Take a photo of your lady fern 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

Can I use strong pesticides on my fern?
Avoid harsh chemicals, as ferns are very sensitive and can easily burn. Stick to gentle soaps or neem oil.
Do pests mean my plant is dying?
Not necessarily. If you catch them early, your fern will recover just fine.

Guides to these causes

More problems with Lady fern

Back to the Lady fern 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.