Red spots on hydrangea leaves
A couple of months ago I planted 3 new hydrangeas. They are small plants that haven't flowered yet and I planted them in dappled shade. They are growing ok, but red spots have appeared on the leaves. Is this a disease or a sign that autumn is on the way and the leaves are declining. If it's a disease or infection, do I need to treat it or will it sort itself out over the winter? Thanks.