Troubleshooting
Daylily 'Frans Hals' problems — and how to fix them
Daylily 'Frans Hals' (Hemerocallis 'Frans Hals') 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.
Tall scapes flopping
In shaded or overly fertile conditions, scapes elongate and fall over. Stake or move to full sun; reduce nitrogen fertiliser.
Rust disease
Orange pustules on foliage indicate Puccinia hemerocallidis. Remove affected leaves, spray with a registered fungicide, and improve plant spacing.
Spider mites in dry spells
Stippled, bronze foliage and fine webbing indicate mites. Increase watering frequency and apply a miticide or neem oil spray.
Thrips on flowers
Cause silvery streaking on petals. Treat with spinosad during bud break.
Decline after 5+ years
Old clumps lose vigour. Lift and divide in late summer, replanting the healthiest outer sections in enriched soil.
Prevent daylily 'frans hals' problems before they start
Most daylily 'frans hals' issues are care-mismatch, not bad luck. Dial in the basics:
Daylily 'Frans Hals' problems — FAQ
Why is my daylily 'frans hals' tall scapes flopping?
In shaded or overly fertile conditions, scapes elongate and fall over. Stake or move to full sun; reduce nitrogen fertiliser.
Why is my daylily 'frans hals' rust disease?
Orange pustules on foliage indicate Puccinia hemerocallidis. Remove affected leaves, spray with a registered fungicide, and improve plant spacing.
Why is my daylily 'frans hals' spider mites in dry spells?
Stippled, bronze foliage and fine webbing indicate mites. Increase watering frequency and apply a miticide or neem oil spray.
Why is my daylily 'frans hals' thrips on flowers?
Cause silvery streaking on petals. Treat with spinosad during bud break.
Why is my daylily 'frans hals' decline after 5+ years?
Old clumps lose vigour. Lift and divide in late summer, replanting the healthiest outer sections in enriched soil.