Korean Spice Viburnum - Need Help!
My Korean Spice Viburnum is beginning to look shabby this fall, the leaves have a ton of brown (rusty looking) spots on them, and I'm not sure why this is happening to this shrub. It's about 3-4 years old and it blooms fine in the spring, very pretty blossoms that smell spectacular, however, for the past couple of falls, this has been happening.
At first I thought it might be due to the dry hot summers we've been having, but I water it a lot to make sure that it's getting enough. We haven't had much rain here in MA this summer.
Does anyone have any thoughts regarding this issue? I don't fertilize this plant, well not this summer anyway, I may have last year. It gets sun just about all day long.