Attached is a photo of the brown spots on my Magnolia Tree. There are other plants in the garden suffering the same fate. There are brown spots and the leaves are yellowing. I am concerned that it is spreading and the damage could be major. This is in the Lower Mainland, the weird weather this spring may be a factor. I also have issues with a couple of my Azaleas (different damage, perhaps rust?) and all the old leaves on the young Arbutus tree developed black spots and then fell off. Some of the roses have lots of black spot this year as well.
