Walter's Viburnum (Viburnum obovatum) is a fairly recent small-leaved native substitute for what most people call "boxwoods:" true Boxwoods, Japanese Hollies, Dwarf Yaupons, etc. Which Viburnum is best for foundation plantings, Mrs Schillers, Whorled Class, or a different one? I am most concerned about them turning "leggy" with age, so the longer you will have had them, the better you would know.