I just received a new Australian Brush Cherry and a few leaves have brown spots, edges. It seems contagious to the other leaves. What is it and how do I treat it?
This my 2nd brush cherry.

The first one I bought last year from a NY/NJ area online seller. It had the same exact spots (though more of them) which spread quickly and then the leaves all fell off the tree died after less than a week.
The roots are healthy. The tree looks as though it was just replanted in normal soil and a blob of moss living on sand/soil mixture was placed around the base. It was shipped Tuesday and I got it today.
thanks
Mage9973