We have recently bought a little Dwarf white pine, the one with the soft needles. We planted it on a mound and put a little bonemeal in the hole. We have read that they need no particular ground prep, so left it at that. Its about six weeks latter and we are starting to notice a yellowing of some of the needles. The yellowing is on all parts of the tree. The dirt has some clay in it, but is on a mound so it should have decent drainage. In the summer it is very dry. Does anyone have any ideas? We haven't fertilized it so maybe it is missing something.