Tree Parrotia persica [Persian Parrotia] One of the best trees for foliage and bark effect. Very adaptable, tolerating drought, various soils, heat, cold, etc. Prefers full sun but tolerates light shade. Sites with strong winter winds will surely cause tip dieback in Northern Indiana.
Liana (Climbing Vine) Parthenocissus tricuspidata [Boston Ivy] One of the strongest-climbing vines, give solid support for attachment of the adhesive discs on tendrils. Not a vine for trellises or fences. Very tolerant of urban soils. Not a good groundcover.
Tree Pinus parviflora [Japanese White Pine] The species exhibits good salt tolerance. Although subject to rusts, wood rots, nematodes, and sawflies, none are serious.
Shrub/Tree Platycladus orientalis [Oriental Arborvitae] Best in at least fairly moist soils, and with fairly high humidity. Habit tends toward becoming thinner (open) with age. Subject to "winter-burn" near the edge of its useful range. Certain forms provide very positive accent, but can be over-used. Bagworms can also be a problem.
Tree Pseudolarix amabilis [Golden Larch] No serious diseases. Should be protected from too much wind.
Shrub Pyracantha coccinea 'Lalandei' [Lalandei Scarlet Firethorn] A favorite for espalier training, because of the adaptable branching habit, showy fruits, and vigourous growth. Adapted to a variety of soils and environments but is susceptible to scab. 'Lalandei' is the most popular Scarlet Firethorn cultivar in northern areas, although it may winter burn.
Tree InvasiveThis plant is considered invasive Pyrus calleryana [Callery Pear] Overused, weak wooded, short-lived. Flowers are malodorous and often killed by late spring freezes. Some fireblight susceptiblity. Forms narrow crotch angles that can result in a larger tree literally splitting in two. Very small fruits are a litter problem when abundant. Considered invasive in many areas.
Tree InvasiveThis plant is considered invasive Pyrus calleryana 'Glen’s Form' [sold as Chanticleer®] [Chanticleer Callery Pear] Generally considered to be one of the best cultivars of P. calleryana. While still prone to limb breakage, it is stronger wooded than other variants. The Chanticleer Callery Pear is also known for its resistance to fireblight. Flowers are malodorous and often killed by late spring freezes. Very small fruits are a litter problem when abundant. Considered invasive in many areas.
Tree Indiana Native Quercus bicolor [Swamp White Oak] The Swamp White Oak is a sturdy, long-lived tree that is generally tolerant to average conditions and even wet soil, but requires full sun and acidic soil.
Tree Indiana Native Quercus coccinea [Scarlet Oak] Excellent scarlet fall foliage, comparable if not often better than the Pin Oak. Does not suffer iron chlorosis as bad as Pin Oak, being more tolerant of alkaline soils. Some report difficulty in transplanting.
