Troubleshooting
King Ferdinand's Saxifrage problems — and how to fix them
King Ferdinand's Saxifrage (Saxifraga federici-augusti) 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.
Botrytis (grey mould) on hairy stems
The glandular, hairy flower stems are particularly susceptible to Botrytis cinerea in still, humid conditions; improve air circulation immediately, remove affected material with clean scissors, and water only at soil level.
Root rot from summer moisture
S. federici-augusti enters a semi-dormant period in summer and dislikes wet roots at this time; in outdoor cultivation ensure the bed is raised and well-drained, or move potted specimens under a bench or cloche during rainy summers.
Prevent king ferdinand's saxifrage problems before they start
Most king ferdinand's saxifrage issues are care-mismatch, not bad luck. Dial in the basics:
King Ferdinand's Saxifrage problems — FAQ
Why is my king ferdinand's saxifrage botrytis (grey mould) on hairy stems?
The glandular, hairy flower stems are particularly susceptible to Botrytis cinerea in still, humid conditions; improve air circulation immediately, remove affected material with clean scissors, and water only at soil level.
Why is my king ferdinand's saxifrage root rot from summer moisture?
S. federici-augusti enters a semi-dormant period in summer and dislikes wet roots at this time; in outdoor cultivation ensure the bed is raised and well-drained, or move potted specimens under a bench or cloche during rainy summers.