I only have aphids on the elderberry. It has to deal with it, it's no different in nature. It also stands far enough back from other plants. Unfortunately, our chestnut tree is already showing leaf miner moth spots again, but not too many yet. We burned the leaves for years as widely recommended, but apparently it did not help. Now it has to cope on its own; it is now too big and has too many leaves, which we also cannot remove from the thicket behind the garden. Otherwise, almost all the bushes we planted in the front garden survived the transplant. And they were all 1.5 to 2 meters tall and planted with others in the soil. Only one cherry laurel did not want to.