Plants

Pyracantha coccinea 'Kasan'
[Compact Scarlet Firethorn]

A favorite for espalier training, because of the adaptable branching habit and showy orange-red fruits. Tends to be semi-evergreen in cooler climates and evergreen in warmer climates. Adapted to a variety of soils and environments. 'Kasan' is a hardier (USDA zone 5), compact cultivar with spreading branches and excellent fruit set. Scab can be serious in this cultivar. Other possible problems include fireblight and leaf and twig blight.

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

Pyrus calleryana
[Callery Pear]

Overused, weak wooded, short-lived. Flowers are malodorous and often killed by late spring freezes. Some fireblight susceptibility. 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

Pyrus calleryana 'Aristocrat' [sold as Aristocrat®]
[Aristocrat Callery Pear]

Aristocrat is one of the better performing Callery Pear variants. Flowers are malodorous, but the later blooming Aristocrat flowers are not as often killed by late spring freezes as are the flowers of other P. calleryana variants. Some fireblight susceptibility, especially in the south. The branching of Aristocrat is more horizontal and does not form as narrow crotch angles as many other Callery Pears. Very small fruits are a litter problem when abundant. Considered invasive…

Pyrus calleryana 'Aristocrat' [sold as Aristocrat®]

Tree

Pyrus calleryana 'Bradford'
[Bradford Callery Pear]

The cultivar 'Bradford' was exceedingly popular in the recent past, becoming overused because of its beautiful white flower show and outstanding scarlet to purple fall color. However, it is now advised not to use this short-lived cultivar, as it has very weak wood and tight branch angles and is quite prone to serious breakage. Forms narrow crotch angles that can result in a larger tree literally splitting in two. Flowers are malodorous and often killed…

Tree

Pyrus calleryana 'Capital'
[Capital Callery Pear]

Overused, weak wooded, short-lived. Flowers are malodorous and often killed by late spring freezes. Forms narrow crotch angles that can result in a larger tree literally splitting in two. Very small fruits are a litter problem when abundant. 'Capital' is narrow-columnar in form and is severely susceptible to fireblight. The aesthetics of this cultivar decrease considerably with age. Considered invasive in many areas.

Tree

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.

Pyrus calleryana 'Glen’s Form' [sold as Chanticleer®]

Tree

Quercus × 'Crimschmidt' [sold as Crimson Spire™]
[Crimson Spire Oak]

The Crimson Spire Oak is notable for its powdery mildew resistance and reddish fall color that it gained from its White Oak parent, in addition to the dense, strong, vertical, columnar form, and tolerance to drought and urban conditions gained from its Fastigiate English Oak parent.