Pest identification
What's eating my cast iron plant?
Spider mites
Signs: Pale silvery stippling on the broad, dark-green leaves; webbing on undersides in severe cases.
Control: Wipe leaves thoroughly with a damp cloth; apply neem oil or insecticidal soap spray every 7 days for three weeks.
Scale insects
Signs: Brown or tan bumps along leaf mid-ribs and stems; leaves lose gloss and may develop yellow patches.
Control: Scrape off with a soft brush; treat with horticultural oil spray and repeat in 14 days.
Slugs
Signs: Irregular holes and ragged edges on new leaves emerging at soil level, with characteristic silvery slime trails.
Control: Remove by hand at night; apply iron phosphate slug pellets (safe for wildlife and pets) around the base; avoid overly moist mulch against stems.
Keep cast iron plant pest-free
Healthy plants resist pests best. Get the basics right:
Cast iron plant pests — FAQ
What is eating my cast iron plant?
Cast iron plants (Aspidistra elatior) live up to their name — they have very few pest problems indoors. Spider mites are the most likely visitor in very dry heated rooms. Scale can colonise older stems when plants are neglected. When grown outdoors in mild climates, slugs may nibble emerging new leaves at soil level.
How do I get rid of spider mites on cast iron plant?
Pale silvery stippling on the broad, dark-green leaves; webbing on undersides in severe cases. Wipe leaves thoroughly with a damp cloth; apply neem oil or insecticidal soap spray every 7 days for three weeks.
How do I get rid of scale insects on cast iron plant?
Brown or tan bumps along leaf mid-ribs and stems; leaves lose gloss and may develop yellow patches. Scrape off with a soft brush; treat with horticultural oil spray and repeat in 14 days.
How do I get rid of slugs on cast iron plant?
Irregular holes and ragged edges on new leaves emerging at soil level, with characteristic silvery slime trails. Remove by hand at night; apply iron phosphate slug pellets (safe for wildlife and pets) around the base; avoid overly moist mulch against stems.