Troubleshooting
Daylily 'Double River Wye' problems — and how to fix them
Daylily 'Double River Wye' (Hemerocallis 'Double River Wye') 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.
Botrytis on double blooms
The complex double flower head traps moisture, promoting grey mould in wet weather. Deadhead promptly, improve spacing, and avoid wetting flowers when irrigating.
Incomplete double flower expression
In cool summers or under low-fertility conditions, blooms may revert toward single form. Improve soil fertility and ensure full sun exposure.
Rust
Puccinia hemerocallidis can reduce plant vigour. Remove affected foliage promptly and apply fungicide if infection is widespread.
Aphids
Attracted to buds and soft new growth. Treat with insecticidal soap; avoid broad-spectrum insecticides during bloom when pollinators visit.
Crown rot
In poorly drained soils, especially over winter, the crown may rot. Improve drainage, avoid mulching directly against the crown, and lift and inspect clumps showing decline.
Prevent daylily 'double river wye' problems before they start
Most daylily 'double river wye' issues are care-mismatch, not bad luck. Dial in the basics:
Daylily 'Double River Wye' problems — FAQ
Why is my daylily 'double river wye' botrytis on double blooms?
The complex double flower head traps moisture, promoting grey mould in wet weather. Deadhead promptly, improve spacing, and avoid wetting flowers when irrigating.
Why is my daylily 'double river wye' incomplete double flower expression?
In cool summers or under low-fertility conditions, blooms may revert toward single form. Improve soil fertility and ensure full sun exposure.
Why is my daylily 'double river wye' rust?
Puccinia hemerocallidis can reduce plant vigour. Remove affected foliage promptly and apply fungicide if infection is widespread.
Why is my daylily 'double river wye' aphids?
Attracted to buds and soft new growth. Treat with insecticidal soap; avoid broad-spectrum insecticides during bloom when pollinators visit.
Why is my daylily 'double river wye' crown rot?
In poorly drained soils, especially over winter, the crown may rot. Improve drainage, avoid mulching directly against the crown, and lift and inspect clumps showing decline.