Betual lenta is the largest producer of wintergreen oils of any species of birch. A birch from further east, it tends to like moist but well-drained slopes and soils. It is much more of a tree than the others in the “sweet” birch group, with heav ... ier limbs and higher canopy. Great for yards with moist(ish) soils that need a secondary shade tree but not a primary. It has been very hardy in our area.