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Golden-scaled male fern · Dryopteris affinis

Why are there brown bumps on my Golden-scaled male fern?

Those brown bumps are likely scale insects, which suck the sap from your fern's fronds. Check the undersides of the leaves and along the stems for these small pests.

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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 closely.
  2. Look for sticky residue on the leaves or the surface below the plant.
  3. Try to gently scrape a bump off to see if it moves or detaches.

Likely causes

  1. Scale insects

    Most likely

    How to tell: You will see small, hard, brown bumps that look like tiny shields on the fronds. They may also leave behind a sticky residue called honeydew.

    What to do: Gently scrape the insects off with a soft cloth or cotton swab dipped in rubbing alcohol. For larger infestations, apply neem oil or insecticidal soap every 7 to 10 days.

Pests on other plants

Find out what's wrong with your golden-scaled male 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

Scale can weaken your plant significantly if left unchecked. Treat them as soon as you spot them to prevent them from spreading to other plants.

Stopping it coming back

Regularly wipe down your fern's leaves with a damp cloth to remove dust and check for early signs of pests.

Golden-scaled male fern: pests? Check yours with a photo

Every plant is a little different. Take a photo of your golden-scaled male 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 household soap to kill scale?
It is safer to use insecticidal soap specifically formulated for plants. Regular dish soap can sometimes be too harsh for delicate fern fronds.
Do I need to isolate my fern?
Yes, move the affected plant away from your other houseplants immediately. Scale spreads easily to nearby plants.

Guides to these causes

More problems with Golden-scaled male fern

Back to the Golden-scaled male 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.