Advice needed please
Hi, I have a young Amelanchier Lamarckii that I purchased just a few months ago. It was healthy looking at first, but then I noticed, what looks like mildew on some of the lower leaves. I have inspected it again today, and the "mildew" has spread up to the higher leaves.
Would love to get some advice, on what this might be, and if there is any treatment please. Thanks