Pest identification
What's eating my marginal wood fern?
Slugs and snails
Signs: Irregular holes and chewed edges on new fronds; slime trails on foliage.
Control: Use ferric phosphate bait (safe for wildlife and pets); remove mulch that harbors slugs; hand-pick at night after rain.
Vine weevil
Signs: Notched frond margins from adults; larval feeding on roots causes wilting and plant death.
Control: Apply beneficial nematodes (Steinernema spp.) to moist soil in spring and autumn; use neonicotinoid-free vine weevil compost drench.
Deer
Signs: Fronds browsed or trampled, especially in spring when protein-rich croziers emerge.
Control: Use deer repellent sprays (containing putrescine or capsaicin); install physical fencing where deer pressure is high.
Keep marginal wood fern pest-free
Healthy plants resist pests best. Get the basics right:
Marginal Wood Fern pests — FAQ
What is eating my marginal wood fern?
Marginal Wood Fern (Dryopteris marginalis) is a tough North American garden fern. Slugs and snails are the most common pest, chewing holes in tender new fronds. Vine weevil larvae can damage roots in container plants. Deer occasionally browse the fronds where populations are high, but this fern is generally less palatable than many perennials.
How do I get rid of slugs and snails on marginal wood fern?
Irregular holes and chewed edges on new fronds; slime trails on foliage. Use ferric phosphate bait (safe for wildlife and pets); remove mulch that harbors slugs; hand-pick at night after rain.
How do I get rid of vine weevil on marginal wood fern?
Notched frond margins from adults; larval feeding on roots causes wilting and plant death. Apply beneficial nematodes (Steinernema spp.) to moist soil in spring and autumn; use neonicotinoid-free vine weevil compost drench.
How do I get rid of deer on marginal wood fern?
Fronds browsed or trampled, especially in spring when protein-rich croziers emerge. Use deer repellent sprays (containing putrescine or capsaicin); install physical fencing where deer pressure is high.