East Lothian, United Kingdom
Need help again here! Just noticed that one of my rhododendrons looks a bit "dusty." Have no idea why. It is near a cotinus about 15 feet tall. I rubbed my finger along the leaf and the dust seemed like very fine household dust (went into little clumps). The leaf underneath the dust was shiny and green. Can anyone tell me what the dust is? Do I need to do anything about it?
- 27 Jul, 2011