Shrub Rhododendron × 'Northern Starburst' (P.J.M. Hybrid Group) [Northern Starburst Rhododendron] One of the most cold tolerant flower buds of the evergreen rhododendrons. Flowers can become a dirty looking mauve-lavender soon after opening. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhododendron × 'Olga Mezitt' (P.J.M. Hybrid Group) [Olga Mezitt Rhododendron] 'Olga Mezitt' is a vigorous rhododendron with pink flowers. One of the most cold tolerant flower buds of the evergreen rhododendrons. Flowers can become dirty looking soon after opening. Avoid harsh, dry, windswept sites. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhododendron × 'P.J.M.' (P.J.M. Hybrid Group) [P.J.M. Rhododendron] One of the most cold tolerant flower buds of the evergreen rhododendrons. Flowers can become a dirty looking lavender soon after opening. Quite variable in form and flower color. Avoid harsh, dry, windswept sites. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhododendron × 'Purple Gem' [Purple Gem Rhododendron] 'Purple Gem' is a compact, rounded, dwarf rhododendron that is hardy to 15 degrees Fahrenheit. Avoid harsh, dry, windswept sites. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhododendron × 'Victor' (P.J.M. Hybrid Group) [Victor Rhododendron] The compact and slow-growing cultivar 'Victor' is the earliest of the 'P.J.M' Hybrid group to bloom. One of the most cold tolerant flower buds of the evergreen rhododendrons. Flowers can become a dirty looking lavender soon after opening. Susceptible to a large number of pests and diseases, which can largely be prevented by good cultural practices.
Shrub Rhodotypos scandens [Black Jetbead] Relatively trouble-free. Tolerant of a variety of soils and environments, particularly dryness and shade. Commonly becomes straggly if growing in a site that is too dry or too wet.
Shrub Indiana Native Rhus glabra [Smooth Sumac] Large, club-like fruit clusters and rather coarse compound leaves make this a plant that can best be appreciated from a distance, and so it is at its best in large-scale plantings. Picturesque branches. Hard to kill this plant. Can be rejuvenated by cutting to ground in late winter. Plants are dioecious, so only females have the fruiting interest, but all plants are reliably colorful in fall foliage. Spreads rapidly by suckers.
Shrub Ribes alpinum [Alpine Currant] Dioecious (male clones used mostly because these are thought to be rust resistant). Quite resistant to white pine blister rust, whereas other Ribes are not. Many insects and diseases. Flowers not showy and fruits not edible.
Shrub Indiana Native Robinia hispida var. fertilis [Bristly Locust] Can fix nitrogen. Especially well adapted to poor, dry, alkaline soils. Though native, can be invasive on sandy soils. Frequent pruning may be needed.
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.
