Pest identification
What's eating my wood fern 'the king'?
Scale insects
Signs: Armored lumps on frond midribs and stipes; sticky honeydew; slow yellowing of mature fronds.
Control: Scrape off with an alcohol-dipped brush; apply horticultural oil spray every 7–10 days until no live scale remains.
Spider mites
Signs: Pale stippling and fine webbing on frond undersides; fronds look dusty and may drop in heavy infestations.
Control: Boost humidity; rinse fronds with water; spray with insecticidal soap or diluted neem oil weekly.
Mealybugs
Signs: White waxy clusters near the crown and in frond bases; honeydew drips; sooty mold may appear.
Control: Dab with isopropyl alcohol on a cotton swab; follow with neem oil spray; repeat weekly.
Keep wood fern 'the king' pest-free
Healthy plants resist pests best. Get the basics right:
Wood Fern 'The King' pests — FAQ
What is eating my wood fern 'the king'?
Wood Fern 'The King' (Dryopteris affinis) grown indoors is susceptible to the typical houseplant fern pests: scale insects along its stout midribs and spider mites in dry air. Mealybugs and fungus gnats are secondary concerns. Its robust, semi-evergreen fronds can mask early infestations, so check frond undersides and the crown regularly.
How do I get rid of scale insects on wood fern 'the king'?
Armored lumps on frond midribs and stipes; sticky honeydew; slow yellowing of mature fronds. Scrape off with an alcohol-dipped brush; apply horticultural oil spray every 7–10 days until no live scale remains.
How do I get rid of spider mites on wood fern 'the king'?
Pale stippling and fine webbing on frond undersides; fronds look dusty and may drop in heavy infestations. Boost humidity; rinse fronds with water; spray with insecticidal soap or diluted neem oil weekly.
How do I get rid of mealybugs on wood fern 'the king'?
White waxy clusters near the crown and in frond bases; honeydew drips; sooty mold may appear. Dab with isopropyl alcohol on a cotton swab; follow with neem oil spray; repeat weekly.