Japanese tree lilac (Syringa reticulata) is at its best for two weeks in early summer when the flowers bloom. The clusters of white, fragrant flowers are about a foot long and 10 inches wide. Growing Japanese lilac trees near a window allows you to enjoy the flowers and fragrance indoors, but make sure you leave plenty of room for the tree’s 20-foot spread. After the flowers fade, the tree produces seed capsules that attract songbirds to the garden.
Japanese Tree Lilac. Zone 3-7. It has a delightfully scented long blooming season and is very easy to care for. It will mature to 25' and can be left to grow as a shrub or trimmed to a multi or single trunked small tree.