Ivory Silk Tree Lilac (tree form) will grow to be about 25 feet tall at maturity, with a spread of 20 feet. Japanese Tree Lilac is properly used as a specimen, entranceway, or street tree without powdery mildew on its foliage. Makes a perfect accent or background plant. Japanese tree lilac, Syringa reticulata ‘Ivory Silk ... ‘Ivory Silk’ was selected in 1973 by Sheridan Nursery in Ontario, Canada.

It is a little smaller than the species with a height of up to 20 feet. Life Expectancy.

A small tree or large shrub that forms a rounded crown with rich green foliage on attractive reddish-brown bark. The Japanese Tree Lilac originated in northern Japan (4). Syringa reticulata is a tree form Lilac with showy, early June, creamy-white inflorescences. Its general purpose is to maintain or restore vigor to the plant. It grows at a medium rate, and under ideal conditions can … Introduction. Ivory Silk Japanese Lilac Tree Syringa reticulata 'Ivory Silk' Beautiful creamy-white blooms with a captivating fragrance spring through summer. Its upright habit varies from symmetrical to irregular but is more consistent than the species.

It has a low canopy with a typical clearance of 5 feet from the ground, and is suitable for planting under power lines. It grows at a medium rate, and under ideal conditions can be expected to live for 40 years or more. HORTICULTURE. This tree is moderately long lived (40-50 years) but will likely have a shortened life span in an urban landscape (7). It has a low canopy with a typical clearance of 5 feet from the ground, and is suitable for planting under power lines. Ivory Silk Tree Lilac will grow to be about 20 feet tall at maturity, with a spread of 14 feet. Both forms have a lovely shape that looks great in shrub borders or as specimens. Edward F. Gilman and Dennis G. Watson 2.

Landscape Use. Japanese tree lilac (Syringa reticulata) is at its best for two weeks in early summer when the flowers bloom.

The plant is available as a multi-stemmed shrub or a tree with a single trunk. It is a prolific bloomer that makes an excellent street tree or specimen. Large Ivory Silk Lilac Trees that have been severely pruned have the advantage of a large root system that has excessive capacity, and its roots are capable of supplying all of its energies to a smaller number of branches and foliage. Pruning large Ivory Silk Lilac Trees may be minor or major.

Syringa reticulata 'Ivory Silk': 'Ivory Silk' Japanese Tree Lilac 1. Although a lilac, this member of the species is quite different in appearance than those with which gardeners are more familiar. The clusters of white, fragrant flowers are about a foot long and 10 inches wide. Ecological Zone Syringa reticulata is cold hardy in USDA zones 3 to 7, Minnesota zones include 3a to 5a which include average minimum temperatures of -40 degrees to -15 degrees Fahrenheit (2). Trees bloom at a young age and are compact with a dense, rounded form.