Troubleshooting
Snake's Head Iris problems — and how to fix them
Snake's Head Iris (Hermodactylus tuberosus) 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.
Tuber rot in wet or acid soil
The most common cause of failure in UK gardens; tubers collapse when drainage is insufficient or soil is acidic — plant in raised, gritty, chalky beds or a cold frame for reliable results.
Slug damage to emerging foliage
Slugs target the new grass-like shoots in autumn and late winter; apply organic slug pellets (ferric phosphate) or use copper barriers around the planting area.
Prevent snake's head iris problems before they start
Most snake's head iris issues are care-mismatch, not bad luck. Dial in the basics:
Snake's Head Iris problems — FAQ
Why is my snake's head iris tuber rot in wet or acid soil?
The most common cause of failure in UK gardens; tubers collapse when drainage is insufficient or soil is acidic — plant in raised, gritty, chalky beds or a cold frame for reliable results.
Why is my snake's head iris slug damage to emerging foliage?
Slugs target the new grass-like shoots in autumn and late winter; apply organic slug pellets (ferric phosphate) or use copper barriers around the planting area.