This is considered to be the full dwarf tree. M 9 should be planted on fertile well-drained soil and requires support. A tree on this root is about 30-35 percent in size compared to a standard tree. In our own orchards, we have had very early and heavy production from M 9 rooted trees. M 9 may not be as winter hardy as those on other dwarfing roots. It can be planted close in double rows.