I have 2 small groves, no more than 5 trees or so, of Acer campestre. The chief Horticulturist here at Bernheim used to take all the leaves in the Acer collection and dump them in one of the groves. They seemed to acclimate very well and weren't bothered by disease or pests, but then the practice was dropped and apparently the trees quit doing so well. Does anyone have any ideas as to why A. campestre might do better with a mulching of Acer leaves? Any thoughts at all?
Any Acer, and basically any tree or shrub, will do better with a thick layer of mulch. One could enter into a jesuitical argumentation on which leaves are best for which plant but it is better to retain that any kind of mulch is better than none. Gomero