Pest identification
What's eating my rose of sharon 'diana'?
Japanese beetle
Signs: Leaves reduced to a lace-like skeleton; flowers chewed and browned
Control: Hand-pick into soapy water at dawn when beetles are sluggish; neem oil foliar spray; avoid pheromone traps near the plant
Aphids
Signs: Sticky, curled shoot tips; clusters of green or black insects; sooty mould on leaves
Control: Strong water jet to dislodge; insecticidal soap; encourage ladybirds and hoverflies
Deer
Signs: Young stems and buds nipped off; browse line visible after overnight feeding
Control: Deer repellent spray reapplied after rain; wire cage around newly planted specimens
Keep rose of sharon 'diana' pest-free
Healthy plants resist pests best. Get the basics right:
Rose of Sharon 'Diana' pests — FAQ
What is eating my rose of sharon 'diana'?
Rose of Sharon 'Diana' faces the same pest pressures as other Hibiscus syriacus cultivars: Japanese beetles skeletonise leaves and destroy pure-white flowers in summer, aphids cluster on new growth, and deer browse shoots. Catching Japanese beetles early — by hand each morning — makes the biggest difference.
How do I get rid of japanese beetle on rose of sharon 'diana'?
Leaves reduced to a lace-like skeleton; flowers chewed and browned Hand-pick into soapy water at dawn when beetles are sluggish; neem oil foliar spray; avoid pheromone traps near the plant
How do I get rid of aphids on rose of sharon 'diana'?
Sticky, curled shoot tips; clusters of green or black insects; sooty mould on leaves Strong water jet to dislodge; insecticidal soap; encourage ladybirds and hoverflies
How do I get rid of deer on rose of sharon 'diana'?
Young stems and buds nipped off; browse line visible after overnight feeding Deer repellent spray reapplied after rain; wire cage around newly planted specimens