Japanese Tree Lilac. This is a Lilac of a completely different sort. It's a small tree that produces large (up to 12in long), showy panicles of creamy white blooms with a musky scent in the latter half of June, well after the main Lilac show. It makes a striking specimen tree, and several plants can be grouped to make a more emphatic statement or lined up to form a screen. The smooth brown bark, which resembles that of a Cherry, provides winter interest. The Tree Lilac is perhaps the most adaptable of the Lilacs, tolerating lower pH and drier soil than most of its shrubby cousins, and it is highly resistant to powdery mildew. If you're looking for a small flowering tree, 'Ivory Silk' must be at the top of your list. 3 ft. bareroot plants.