"The Tree Lilac, Syringa reticulata, 'Ivory Silk' is a heavily flowering tree, covered by large plumes of small white flowers in the beginning of summer. It?s dark green leaves blending with it?s fragrant lavender flowers are a favorite for spring-time landscapes. Lilac lovers prefer the mutiple-stemmed, large shrub. The Tree Lilac is also called a Japanese tree lilac or Ivory Silk lilac. It flowers more heavily than other lilac species. Ivory Silk is probably the most trouble free and tough lilac that is available."