I have a 20 year old shrub Viburnum Carlcephalum which I tracked down after smelling its wonderful perfume at Bodnant gardens. I was able to buy the shrub that day from their nursery shop and have loved it for its flowers and scent in May. Unfortunately, even before it has finished flowering the leaves always look very sick and the undersides are covered in a white powdery substance rather like mildew. Then the leaves discolour and dry up leaving the plant looking a miserable sight. I have sprayed for pests and diseases but this year it has not responded. The flowers are always perfect and the leaves usually recover when I cut off the ends of the branches but not this year.
- 1 Jul, 2011