Troubleshooting
Helenium 'Helbro' problems — and how to fix them
Helenium 'Helbro' (Helenium 'Helbro') 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.
Powdery mildew
Can be problematic in dry soils. Consistent watering and mulching prevent the dry-soil conditions that favour the disease.
Slugs in spring
Emerging shoots are a target for slugs and snails. Apply organic slug pellets or use a grit barrier around the crown.
Aphids
Spring shoots attract greenfly. Treat promptly with insecticidal soap to prevent population build-up.
Leaf scorch
Occurs when roots dry out. Consistent watering and mulching during summer prevents this.
Clump ageing
Older clumps become congested and flower poorly. Divide every 3 years in spring to maintain vigour.
Prevent helenium 'helbro' problems before they start
Most helenium 'helbro' issues are care-mismatch, not bad luck. Dial in the basics:
Helenium 'Helbro' problems — FAQ
Why is my helenium 'helbro' powdery mildew?
Can be problematic in dry soils. Consistent watering and mulching prevent the dry-soil conditions that favour the disease.
Why is my helenium 'helbro' slugs in spring?
Emerging shoots are a target for slugs and snails. Apply organic slug pellets or use a grit barrier around the crown.
Why is my helenium 'helbro' aphids?
Spring shoots attract greenfly. Treat promptly with insecticidal soap to prevent population build-up.
Why is my helenium 'helbro' leaf scorch?
Occurs when roots dry out. Consistent watering and mulching during summer prevents this.
Why is my helenium 'helbro' clump ageing?
Older clumps become congested and flower poorly. Divide every 3 years in spring to maintain vigour.