Unique Features: The Summer Storm is a cultivated variety of Japanese Tree Lilac originated in Minnesota in 2013. It is smaller than the species, but grows faster. It grows into an upright, broadly oval shape and is usually cultivated and sold as a single trunk tree form. The dark green, heart-shaped leaves are similar to those of the Common lilac. The ‘true’ tree lilacs (reticulata) are limited to cream-colored flowers, which bloom in large clusters spread over the canopy of the tree. The bloom time is in mid to late June, when it is warm enough to appreciate the lighter lilac fragrance. The empty brown seed capsules and exfoliating red-brown bark provide some winter interest.