Troubleshooting
Daylily 'Ice Carnival' problems — and how to fix them
Daylily 'Ice Carnival' (Hemerocallis 'Ice Carnival') 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.
Petal browning at edges
Pale petals discolour more visibly than darker cultivars when heat-stressed or dehydrated. Maintain consistent watering and light afternoon shade in the hottest climates.
Botrytis on pale blooms
In wet weather, grey mould can develop on the nearly-white petals. Deadhead spent flowers promptly and improve air circulation around the planting.
Rust
Orange pustules on foliage are more visually jarring against the pale flower colour. Remove infected leaves early; apply fungicide if widespread.
Thrips
Silvery streaking is especially visible on near-white petals. Monitor from early bud stage and apply spinosad spray if populations are building.
Clump congestion
Large clumps reduce the size and substance of individual blooms. Divide every 3-4 years to maintain the outstanding flower size for which this cultivar was awarded the Stout Medal.
Prevent daylily 'ice carnival' problems before they start
Most daylily 'ice carnival' issues are care-mismatch, not bad luck. Dial in the basics:
Daylily 'Ice Carnival' problems — FAQ
Why is my daylily 'ice carnival' petal browning at edges?
Pale petals discolour more visibly than darker cultivars when heat-stressed or dehydrated. Maintain consistent watering and light afternoon shade in the hottest climates.
Why is my daylily 'ice carnival' botrytis on pale blooms?
In wet weather, grey mould can develop on the nearly-white petals. Deadhead spent flowers promptly and improve air circulation around the planting.
Why is my daylily 'ice carnival' rust?
Orange pustules on foliage are more visually jarring against the pale flower colour. Remove infected leaves early; apply fungicide if widespread.
Why is my daylily 'ice carnival' thrips?
Silvery streaking is especially visible on near-white petals. Monitor from early bud stage and apply spinosad spray if populations are building.
Why is my daylily 'ice carnival' clump congestion?
Large clumps reduce the size and substance of individual blooms. Divide every 3-4 years to maintain the outstanding flower size for which this cultivar was awarded the Stout Medal.