Tree Indiana Native Robinia pseudoacacia [Black Locust] Widely variable in form, the most picturesque are straight-trunked with branches abruptly fanning out at the top. Fixes N2. Locust borers are troublesome and difficult to control, but many trees live with them successfully for many years. Leaf minors and permanently wet soils can be problems.
Tree Indiana Native Salix nigra [Black Willow] The Black Willow is a fast-growing, wet soils tolerant tree, reaching 30 to 60 feet at maturity. Can sucker profusely, so use sparingly in the landscape. In the wild, you can find Salix nigra near floodplains, streams and rivers, and marshes. The ancient Greeks knew the therapeutic values of willow (Salix) and brewed tea made from willow bark to relieve stiff joints and other bodily aches and pains. A number of insect species attack the…
Tree Indiana Native Sassafras albidum [Common Sassafras] Roots sucker and form thickets, which may or may not be desirable. Sassafras tea contains safrole, a mild carcinogen banned in food products. Iron chlorosis in high pH can turn leaves yellow.
Tree Sophora japonica 'Regent' [Regent Japanese Pagoda Tree] 'Regent' is a cultivar with a fast growth rate, more mass to its oval-round crown, and has deep green glossy leaves. although, It can take up several years before it flowers for the first time.
Tree Sorbus intermedia [Mountainash] Structural pruning is important for this species, as it has weak crotch angles. Prune so that the trunk and branches cannot rub against each other. This tree does not tolerate competition well and should be mulched to the dripline.
Tree Stewartia pseudocamellia [Japanese Stewartia] In the wild, this specimen can grow up to 60' high, much larger than the mature landscape tree which ranges from 20-40' high. The outstanding, multi-colored bark is rich and flaking, ranging from soft grays and browns to orangish brown. There are no serious pests or diseases for this specimen.
Tree Styphnolobium japonicum [Japanese Pagodatree] A widely adapted tree with good drought and pollution tolerance, and foliage texture comparable to Gleditsia, but a smaller tree and with more seasonal interest. Relatively trouble-free except for fungi that live in weaker twigs that cause twig blight and canker. Fungi invade most readily those twigs killed by cold or self-pruning. Seeds are poisonous. Difficult to train a central leader. More cold sensitive when young.
Tree Styrax japonicus [Japanese Snowbell] Relatively trouble-free. Can be susceptible to Ambrosia beetle and canker. Partial shade best in Zones 7 and 8 due to heat intolerance.
Tree Syringa reticulata [Japanese Tree Lilac] A very hardy and showy tree. Attractive, cherry-like mahogany-colored bark, distinctly different from all other lilacs. Widely adapted to soils and environments. Cut to ground to rejuvenate completely. Mildew resistant. Subject to infestations of borers and scale insects, but these are not usually serious enough to discourage its use where some maintenance is available. Alternate year flowering on different parts of the tree can sometimes occur, a problem that can be assuaged by deadheading (use…
