Tree Ulmus parvifolia 'Emer II' [sold as Allee®] [Allee Lacebark Elm] Stunning, multi-colored mottled and exfoliating bark, even on the surface roots. Tends to maintain foliage well during droughts. Grows well under city conditions. Resistant to Dutch elm disease and the elm leaf beetle.
Tree Ulmus parvifolia 'UPMTF' [sold as Bosque®] [Bosque Lacebark Elm] Stunning, multi-colored, mottled, and exfoliating bark. Grows well under city conditions. Good resistance against Dutch elm disease, elm leaf beetle, and Japanese beetle. Slightly weak wooded, sometimes damaged by ice storms.
Tree Ulmus pumila [Siberian Elm] Grows under almost any conditions, especially useful in dry sites. Resists Dutch elm disease. Leaf beetles can defoliate trees. Brittle branches and subsequently messy. Avoid planting this tree in the landscape, unless there is no other choice. Considered invasive in many areas.
Tree Indiana Native Ulmus rubra [Slippery Elm] The Slippery Elm has a vase-shaped form, similar to that of the American Elm (Ulmus americana), but with more ascending branchlets. This tree gained its common name from the moist, slippery, red inner bark chewed by Native Americans and pioneers to quench thirst. Not considered very ornamental for the landscape, due to its coarse texture, weedy tendencies, and susceptibility to Dutch Elm Disease (although not as severe as the American Elm).
Shrub Viburnum × burkwoodii [Burkwood Viburnum] Trouble-free plant tolerant of soils and pollution (except sulfur). Also, does not tolerate more severe drought. Very fragrant when in bloom, although to a lesser degree than Viburnum carlesii (Koreanspice Viburnum). Bacterial spot and powdery mildew susceptibility (but not always a problem). Sulfur containing pesticides burn or defoliate leaves. Too thin to be a solid screen.
Shrub Viburnum × burkwoodii 'Chenaultii' [Chenault Burkwood Viburnum] 'Chenaultii' has a finer-textured, more delicate appearance than the species type due to its smaller leaves and thinner branches. Trouble-free plant tolerant of soils and pollution (except sulfur). Also, does not tolerate more severe drought. Very fragrant when in bloom, although to a lesser degree than Viburnum carlesii (Koreanspice Viburnum). Bacterial spot and powdery mildew susceptibility (but not always a problem). Sulfur containing pesticides burn or defoliate leaves. Too thin to be a solid screen.
Shrub/Tree Indiana Native Viburnum lentago [Nannyberry Viburnum] The Nannybery can be grown as a large, suckering shrub or small tree and is noted for its white flower cymes and edible berries. The flower buds for the following year are formed in the summer, so if pruning is desired, it should be completed immediately after flowering.
Shrub Weigela × 'Dark Horse' [Dark Horse Weigela] 'Dark Horse' is a compact, dwarf cultivar with deep purple leaves and abundant pink flowers. Spreading, dense, rounded shrub, with branches eventually arching to the ground. Extremely adaptable, but prefers good drainage and full sun. Some drought sensitivity. A 3-year pruning cycle improves form and prevents development of legginess. Flowers attract hummingbirds.
Shrub Weigela floribunda [Crimson Weigela] Less common, but very similar to Weigela florida (Old Fashioned Weigela), primarily differing in flowers (dark red-brown and not as showy) and less cold hardiness (USDA zone 6). Spreading, dense, rounded shrub, with branches eventually arching to the ground. Extremely adaptable, but prefers good drainage and full sun. Some drought sensitivity. A 3-year pruning cycle improves form and prevents development of legginess.
Shrub Weigela florida [Old Fashioned Weigela] Spreading, dense, rounded shrub, with branches eventually arching to the ground. Extremely adaptable, but prefers good drainage and full sun. Some drought sensitivity. A 3-year pruning cycle improves form and prevents development of legginess. Flowers attract hummingbirds.
