Plant advice from The Morton Arboretum: New England aster is a native, upright perennial with purple or pinkish daisy-like flowers that bloom in late summer and autumn.
New Horizon elm
Ulmus pumila x U. japonica 'New Horizon'
The New Horizon elm has slightly arching branches that give it a finer textured appearance than most elms. It has excellent resistance to Dutch elm disease (DED), elm leaf miner, and verticillium wilt. This cultivar has large dark green leaves that take on a rusty-red tint in fall. Useful as street, parkway, or shade tree.
New Jersey tea
Plant advice from The Morton Arboretum: During June and July, this rounded shrub is a cloud of white flowers; use it in masses for best affect, as a tall ground cover, or on steep slopes. Despite its name, New Jersey tea is a Chicago-area native.
Unlike other maples, the Nikko maple does not have the traditional "maple" leaf. Each leaf is divided into three leaflets. The leaves turn to shades of red and orange in autumn, giving this medium-sized tree some late-season interest.
This Midwest native tree grows 40 to 60 feet tall, with a narrow, open, irregularly rounded crown and spreading branches. It has large, heart-shaped leaves and large clusters of fragrant, white flowers. The long, interesting seed pods persist through the winter. Northern catalpa is very adaptable to adverse conditions, but has weak wood and branch structure.
Northern red oak
Northern red oak is native to the Midwest and is one of the faster growing oaks for the home landscape. The leaves are handsome throughout the year, emerging pinkish-red, turning lustrous dark green in summer, and changing to russet-red to bright red in autumn. Its tolerance of salt and air pollution makes it a good tree for more exposed areas.
Norway maple (Not recommended)
Norway maples have invasive traits that enable them to spread aggressively. While these trees have demonstrated invasive traits, there is insufficient supporting research to declare them so pervasive that they cannot be recommended for any planting sites. Review of risks should be undertaken before selecting these trees for planting sites. Norway maple is known for its tolerance of urban conditions, but it often becomes a weedy plant through self-seeding.
Norway spruce is a large, pyramidal tree with long, cylindrical cones that hang like ornaments from the weeping branches against the dark green foliage. This sun-loving, 50- to 80-foot-high tree is often used as windbreaks, screens, or hedges in large-scale landscapes.
Plant advice from The Morton Arboretum: Oak-leaved hydrangea is a shrub for all seasons. The large leaves resemble oak leaves and are deep green and sometimes glossy. They turn a deep burgundy in fall and sometimes can persist into winter. The large cone-shaped flower clusters open white and eventually turn a purplish-pink. Older bark is cinnamon brown color and peels to create a texture that makes this plant interesting even when the leaves are gone.
The Ohio buckeye is a neatly rounded tree with low, sweeping branches and dense foliage that provides deep shade. It is one of the first trees to leaf out in the spring. This tree is susceptible to leaf blotch.