Troubleshooting
Wall-rue Spleenwort problems — and how to fix them
Wall-rue Spleenwort (Asplenium ruta-muraria) is generally low-drama, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Root rot from overwatering or acidic soil
The most common failure in cultivation; ensure an alkaline, sharply drained substrate and water only when fully dry — treat this species more like an alpine than a typical shade fern.
Aphid colonies on young fronds
Small, soft-bodied aphids occasionally colonise the tightly clustered new fronds in spring; remove by spraying with a dilute insecticidal soap solution, taking care not to saturate the substrate.
Prevent wall-rue spleenwort problems before they start
Most wall-rue spleenwort issues are care-mismatch, not bad luck. Dial in the basics:
Wall-rue Spleenwort problems — FAQ
Why is my wall-rue spleenwort root rot from overwatering or acidic soil?
The most common failure in cultivation; ensure an alkaline, sharply drained substrate and water only when fully dry — treat this species more like an alpine than a typical shade fern.
Why is my wall-rue spleenwort aphid colonies on young fronds?
Small, soft-bodied aphids occasionally colonise the tightly clustered new fronds in spring; remove by spraying with a dilute insecticidal soap solution, taking care not to saturate the substrate.