Tree Quercus × warei 'Long' [sold as Regal Prince®] [Regal Prince Oak] The Regal Prince Oak is notable for its resistance to powdery mildew and borers, strong vertical, columnar form, and tolerance to wind and ice. Holds its dense, fastigiate form into old age.
Shrub/Tree InvasiveThis plant is considered invasive Rhamnus cathartica [Common Buckthorn] Tolerates most sites. Dioecious. Very invasive, by the seeds that birds love to eat; probably best to refrain from planting this species in the landscape. Susceptible to rusts (Puccinia coronata), that also attacks oats (in oat growing areas, buckthorn eradication is recommended). The bark, leaves, and fruit were once used in purgatives, thus one of this plant's common names, "Purging Buckthorn".
Shrub Rhododendron catawbiense [Catawba Rhododendron] The Catawba Rhododendron is considered to be one of the hardiest rhododendron species. Beautiful plant when it is used in mass. Flower color of the species does not combine well with some other flower colors. Flower color bleaches out in high pH. Subject to winter burning of foliage in exposed sites near the limits of its range. Both flowers and foliage are of equal value in the landscape. Cultivars are usually less hardy than species.…
Shrub Rhododendron catawbiense 'Roseum Elegans' [Roseum Elegans Catawba Rhododendron] A reliable bloomer that is common in commerce. Flower color does not always combine well with some other flower colors. Flower color bleaches out in high pH. Can be subject to winter burning of foliage in exposed sites near the limits of its range, but this cultivar can tolerate extreme heat and extreme cold (to -25 degrees Fahrenheit). Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural…
Shrub Rosa rugosa [Rugosa Rose] Widely adapted to soils and exposures, but especially good in full sun on dry soils. Relatively trouble-free among roses, even resists the common rose pathogens and phytopagous insects. The hips (rose fruits) are a rich source of vitamin C and used commercially in teas. Can get borers in canes (rarely). Good cultural practices are important for roses in order to prevent disease and other pests. Avoid wetting the foliage when watering, place the plant in…
Shrub Indiana Native Sambucus canadensis [American Elderberry] This plant is known most for its fruits, which have a high Vitamin C content and are attractive to both people and wildlife. The berry-like fruits are popular for making wine, juice, jellies, preserves, and pie. However, this plant is not generally advised for use in the landscape due to its excessive suckering and difficult to maintain form (can become quite unkempt). Very tolerant of various environmental conditions.
Shrub Indiana Native Symphoricarpos albus [Common Snowberry] Useful as a bank cover or large scale groundcover. Transplants well. This plant has a beautiful fruit show and is shade tolerant, however, it is also a twiggy, "garbage can plant" (collects leaves and blowing debris); this quality (especially prominent in the fall and winter) limits its usability in the landscape.
Shrub Syringa × chinensis [Chinese Lilac] Can become ratty in appearance, and so should be pruned properly on 3 year cycle. Problems with aphids, powdery mildew, scales, and caterpillars, although powdery mildew is worst problem.
Tree Syringa reticulata 'Ivory Silk' [Ivory Silk Japanese Tree Lilac] The Ivory Silk Japanese Tree Lilac is a very hardy and showy tree, great choice for a specimen tree. Attractive, cherry-like mahogany-colored bark, which is distinctly different from all other lilacs. Widely adapted to soils and environments, Ivory Silk Japanese Tree Lilac can be a great choice for those difficult areas in the landscape. Cut to ground to rejuvenate completely. Some consider the beautiful creamy white flowers to be malodorous, like a privet.
Shrub/Tree Taxus baccata 'Fastigiata' [Irish Yew] Taxus baccata 'Fastigiata' is a columnar, female yew with very strongly, upright branches and lustrous, deep green foliage. Tolerant of shade and heavy pruning. Marginally hardy in USDA zone 5. Can be siginificantly damaged by deer.
