Troubleshooting
Daylily 'Siloam Double Classic' problems — and how to fix them
Daylily 'Siloam Double Classic' (Hemerocallis 'Siloam Double Classic') 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.
Aphids
Clusters of aphids on buds and new growth in spring; knock off with a strong water jet or apply insecticidal soap.
Daylily rust
Orange pustules on leaves caused by Phakopsora hemerocallidis; remove affected foliage and apply a fungicide approved for rust if severe.
Thrips
Cause streaked or distorted petals; most problematic in warm dry spells. Neem oil or spinosad sprays help manage infestations.
Crown rot
Results from waterlogged soil; ensure excellent drainage and avoid overhead watering. Lift and divide overcrowded clumps every 3-4 years.
Slug damage
Slugs feed on emerging foliage in spring; use iron phosphate pellets or place grit around the crown as a deterrent.
Prevent daylily 'siloam double classic' problems before they start
Most daylily 'siloam double classic' issues are care-mismatch, not bad luck. Dial in the basics:
Daylily 'Siloam Double Classic' problems — FAQ
Why is my daylily 'siloam double classic' aphids?
Clusters of aphids on buds and new growth in spring; knock off with a strong water jet or apply insecticidal soap.
Why is my daylily 'siloam double classic' daylily rust?
Orange pustules on leaves caused by Phakopsora hemerocallidis; remove affected foliage and apply a fungicide approved for rust if severe.
Why is my daylily 'siloam double classic' thrips?
Cause streaked or distorted petals; most problematic in warm dry spells. Neem oil or spinosad sprays help manage infestations.
Why is my daylily 'siloam double classic' crown rot?
Results from waterlogged soil; ensure excellent drainage and avoid overhead watering. Lift and divide overcrowded clumps every 3-4 years.
Why is my daylily 'siloam double classic' slug damage?
Slugs feed on emerging foliage in spring; use iron phosphate pellets or place grit around the crown as a deterrent.