American Nurseryman -Jan 2012

Afrocarpus falcatus Araucaria angustifolia Calocedrus formosana are rarely seen in the Coastal Plain Two Asian species C formosana from Taiwan and C macrolepis from southeastern China have performed exceptionally well in zone 8a The Taiwanese incense cedar has dark green foliage that is very attractive Unfortunately both species have been fairly diffi cult to root from cuttings Numerous deodar cedars have been introduced in the past decade Many growers like Cedrus deodara Bushes Electra because it is heavily branched and looks good in a large container The cultivar Gold Cone has performed well in the Deep South and displays nice yellowish foliage during much of the year Many plants from Taiwan perform well in south Georgia including Chamaecyparis obtusa var formosana A plant in my trials reached a height of 22 feet in 10 years Selections are needed that do not turn brown in the winter however All dwarf Cryptomeria japonica selections that I have tried over the past 13 years are dead rarely living more than seven years The exceptions Gyokuryu and Reins Dense Jade are two intermediate forms that have performed well I am currently working with a selection from north Georgia that has good form and remains green through the winter The genus Cupressus is in taxonomic turmoil at the moment Until a fi nal determination can be made I will just call them all Cupressus Leyland cypress can be destroyed by several pathogens including Cercosporidium blight now known as Passalora which requires spray treatments every two weeks from June to Thanksgiving to prevent the problem I have an unnamed clone that has shown excellent disease resistance that may be useful for the Christmas tree industry The selection Gold Rider is the best yellowfoliaged form but it is the poster child for Phomopsis tip blight in south Georgia C funebris is an attractive upright conifer Continued on page 16 C arizonica var glabra Chaparral Chamaecyparis obtusa var formosana Cedrus deodara Gold Cone