Many of the online search results I looked at that reference frog eye leaf spot connect it to apple leaves and also the fruit. My neighbor has an apple tree (not sure what kind, I think they're crabapples) about 20-30ft away from the planter. He doesn't maintain it at all. It has brown spots all through the leaves, but I'm not sure if they're the same thing.
We're on good terms with this guy, so I don't want to start any wars, but would gladly volunteer to help him trim it way back and haul away the debris if I can convince him the tree is spreading fungus (if that's what it is happening). I managed to get a few pictures of the leaves, and also one of the apples to determine what kind they are. One of the apples has an interesting "lump" of some sort on it. Part of the "lump" glistens in the light, like tiny crystals or something.
