Quercus acutissima
Transplants easily. May develop chlorosis on high pH soils. […]
Author: Kirby Kalbaugh
Posts by Kirby Kalbaugh
Quercus alba
One of the most majestic trees at maturity with a picturesque framework, but requires many years to reach maturity. Long-lived, the kind of tree to use where it can be appreciated by succeeding generations. Slow growth eliminates it as a tree for quick effect. Roots are highly sensitive to disturbance, even foot traffic. Almost impossible […]
Quercus × ‘Crimschmidt’ [sold as Crimson Spire™]
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. […]
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Pyrus calleryana ‘Aristocrat’ [sold as Aristocrat®]
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 susceptiblity, especially in the south. The branching of Aristocrat is more horizontal and does not form […]
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Pyrus calleryana ‘Bradford’
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 […]
Pyrus calleryana ‘Capital’
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 […]
Pyrus calleryana ‘Glen’s Form’ [sold as Chanticleer®]
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 […]
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Pseudotsuga menziesii
A highly variable species, in cold and drought hardiness, color, and form. For use in the Midwest, select the hardiest available forms. Prefers atmospheric moisture. Historically, has been an important timber tree in the West. […]
Pseudotsuga menziesii ‘Fastigiata’
Pseudotsuga menziesii is a highly variable species, in cold and drought hardiness, color, and form. For use in the Midwest, select the hardiest available forms. Prefers atmospheric moisture. Historically, has been an important timber tree in the West. ‘Fastigiata’ is a dense, columnar cultivar with distinctly upright branches. […]
Pyracantha coccinea
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. Fireblight can be serious. Other problems are scab and leaf and twig blight. […]