Troubleshooting
Daylily 'Chicago Apache' problems — and how to fix them
Daylily 'Chicago Apache' (Hemerocallis 'Chicago Apache') 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.
Daylily rust
Puccinia hemerocallidis produces orange-yellow pustules on leaves. Remove affected foliage promptly and apply a fungicide labelled for rust if severe.
Leaf streak
Yellow streaking and dieback caused by Aureobasidium microstictum. Improve air circulation, avoid overhead watering, and cut back foliage in autumn.
Aphids
Colonies cluster on new buds and scapes in spring. Knock off with a strong water jet or apply insecticidal soap; natural predators usually provide control.
Thrips
Feeding causes silvery streaking on petals and distorted buds. Spinosad-based sprays applied in the morning are effective when thrips pressure is high.
Crown rot
Caused by Sclerotium rolfsii in warm, wet conditions. Remove and dispose of infected crowns, improve drainage, and avoid excess nitrogen.
Prevent daylily 'chicago apache' problems before they start
Most daylily 'chicago apache' issues are care-mismatch, not bad luck. Dial in the basics:
Daylily 'Chicago Apache' problems — FAQ
Why is my daylily 'chicago apache' daylily rust?
Puccinia hemerocallidis produces orange-yellow pustules on leaves. Remove affected foliage promptly and apply a fungicide labelled for rust if severe.
Why is my daylily 'chicago apache' leaf streak?
Yellow streaking and dieback caused by Aureobasidium microstictum. Improve air circulation, avoid overhead watering, and cut back foliage in autumn.
Why is my daylily 'chicago apache' aphids?
Colonies cluster on new buds and scapes in spring. Knock off with a strong water jet or apply insecticidal soap; natural predators usually provide control.
Why is my daylily 'chicago apache' thrips?
Feeding causes silvery streaking on petals and distorted buds. Spinosad-based sprays applied in the morning are effective when thrips pressure is high.
Why is my daylily 'chicago apache' crown rot?
Caused by Sclerotium rolfsii in warm, wet conditions. Remove and dispose of infected crowns, improve drainage, and avoid excess nitrogen.