Troubleshooting
American Wall Fern problems — and how to fix them
American Wall Fern (Polypodium virginianum) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Waterlogged roots
Sitting in wet mix kills the rhizome rapidly. Always plant in a pot with drainage holes and use a gritty mix. Tip out standing water from saucers within 30 minutes of watering.
Lack of new fronds
New fronds flush mainly in late winter through spring. Low light or very warm indoor temperatures can suppress growth. Move to a cooler, brighter spot to encourage new croziers.
Slugs and snails (outdoor use)
When grown in rock gardens, slugs graze young fronds overnight. Apply organic slug pellets or use copper tape around pots. Inspect the undersides of fronds and rhizome regularly.
Prevent american wall fern problems before they start
Most american wall fern issues are care-mismatch, not bad luck. Dial in the basics:
- Common rock polypody problems — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- American Wall Fern watering schedule
- American Wall Fern light requirements
- Best soil mix for american wall fern
- American Wall Fern temperature & humidity
- Full american wall fern care guide
Looking for american wall fern in general rather than its problems? Read the full american wall fern care guide — light, water, soil and feeding.
American Wall Fern problems — FAQ
Why is my american wall fern waterlogged roots?
Sitting in wet mix kills the rhizome rapidly. Always plant in a pot with drainage holes and use a gritty mix. Tip out standing water from saucers within 30 minutes of watering.
Why is my american wall fern lack of new fronds?
New fronds flush mainly in late winter through spring. Low light or very warm indoor temperatures can suppress growth. Move to a cooler, brighter spot to encourage new croziers.
Why is my american wall fern slugs and snails (outdoor use)?
When grown in rock gardens, slugs graze young fronds overnight. Apply organic slug pellets or use copper tape around pots. Inspect the undersides of fronds and rhizome regularly.