Newt
Lovely garden but u r smothering your tree by burying the rootflare.
http://www.tlcfortrees.info/planting%20depth.htm
You can find me at either of these 2 sites.
http://boards.diynetwork.com/6/ubb.x?a=frm&s=8271906766&f=8421916776
http://www.treehelp.co m/forum/forum/default.asp