EVALUATION OF THE HARDINESS AND GROWTH OF DECIDUOUS ORNAMENTAL SHRUBS

Citation
C. Richerleclerc et al., EVALUATION OF THE HARDINESS AND GROWTH OF DECIDUOUS ORNAMENTAL SHRUBS, Canadian Journal of Plant Science, 74(3), 1994, pp. 615-622
Citations number
19
Categorie Soggetti
Plant Sciences",Agriculture
ISSN journal
00084220
Volume
74
Issue
3
Year of publication
1994
Pages
615 - 622
Database
ISI
SICI code
0008-4220(1994)74:3<615:EOTHAG>2.0.ZU;2-2
Abstract
The winter hardiness and growth potential of 10 cultivars of deciduous shrubs were evaluated to determine their adaptability to climatic con ditions. Plants were grown at eight sites in Quebec and at one site in northeastern Ontario (zones 2, 4 and 5). Cornus alba 'Argenteo-Margin ata' and 'Sibirica', Lonicera korolkowii var. Zabelli, Lonicera korolk owii var. morrowii, Lonicera x xylosleoides 'Clavey's Dwarf', Physocar pus opulifolius, Physocarpus opulifolius 'Aureus' and 'Nanus', Salix p urpurea 'Nana' and Salix elaeagnos were used. Cornus allan 'Sibirica' and L. x xylosteoides 'Clavey's Dwarf' were not affected by winter con ditions at any of the sites I whereas L. korolkowii var. Zabelli and L . morrowii were severely affected, particularly in zone 2. Our results indicated that S. purpurea 'Nana' was more frost resistant than S. el aeagnos. The two cultivars of Physocarpus were slightly less winter ha rdy than the species. None of the 10 species could be grown commercial ly in zone 2a. Growth of S. purpurea 'Nana', S. elaeagnos and P. opuli folius 'Aureus' was limited in zones 4b and 5. The hardiness zones of the 10 species were made more precise, established or modified.