Pest identification
What's eating my oak leaf fern?
Scale insects
Signs: Hard or soft brown bumps on rhizome and frond stems; yellowing fronds and sticky residue
Control: Scrape off with a soft brush; swab with 70% isopropyl alcohol; follow with neem oil spray every 10 days
Mealybugs
Signs: White waxy fluff in rhizome crevices and frond axils; weakened, yellowing growth
Control: Remove clusters manually; apply diluted neem oil or insecticidal soap; repeat weekly for 3–4 weeks
Spider mites
Signs: Pale stippling and fine webbing on frond undersides; worst in heated, dry rooms
Control: Increase ambient humidity; spray fronds with insecticidal soap or neem oil solution; repeat every 7 days
Keep oak leaf fern pest-free
Healthy plants resist pests best. Get the basics right:
Oak Leaf Fern pests — FAQ
What is eating my oak leaf fern?
Oak Leaf Fern (Drynaria quercifolia) grown indoors is most troubled by scale insects clinging to the rhizome and fronds. Mealybugs and spider mites are secondary threats, particularly in low-humidity homes. Check the thick rhizome closely — pests like to shelter in its woolly covering.
How do I get rid of scale insects on oak leaf fern?
Hard or soft brown bumps on rhizome and frond stems; yellowing fronds and sticky residue Scrape off with a soft brush; swab with 70% isopropyl alcohol; follow with neem oil spray every 10 days
How do I get rid of mealybugs on oak leaf fern?
White waxy fluff in rhizome crevices and frond axils; weakened, yellowing growth Remove clusters manually; apply diluted neem oil or insecticidal soap; repeat weekly for 3–4 weeks
How do I get rid of spider mites on oak leaf fern?
Pale stippling and fine webbing on frond undersides; worst in heated, dry rooms Increase ambient humidity; spray fronds with insecticidal soap or neem oil solution; repeat every 7 days