Question: My four-year-old Viburnum 'Summer Snowflake' doesn't look so good. The new leaves are shriveled and chewed up. What am I doing wrong?'
Answer: I'm not surprised. One parent of this cultivar is V. plicatum (meaning pleated leaves), and it's prone to this sort of thing. Make sure you've got it planted in the right spot, which means some sun, some shade. It's also important to plant it with lots of air around it – not up against a wall, as they hate that. Give it a spray of insecticidal soap and soak the soil around it with neem in case there are eggs pupating in the soil. Give it lots of compost, too, and you should start to see an improvement.