Canna x generalis 'Pretoria', or Bengal Tiger Canna, is one of the prettiest hybrid cannas that I have grown. The variegated foliage, light green and cream striped leaves, will reach about 2 feet (60 cm) long by about 1 foot (30 cm) wide. Plants reach up to 6 feet (2 m) in height. Whether grown in the landscape or in containers, I highly recommend this canna. It is hardy as a landscape plant in USDA zones 7-12.
Blooming The plants will bloom all summer long until the first frost. The orange flowers will reach up to 4 inches (10 cm) across and are very showy.
Culture: Canna x generalis 'Pretoria' does best when grown in full sun to partial shade in a rich moist soil. In the greenhouse, we a soil mix consisting of 2 parts peat moss to 2 parts loam to 1 part sand or perlite. The plants in containers are kept moist and fertilized monthly. In the landscape, the plants are used as a backdrop for lower growing plants and can be used around water features. I have used these plants in the edge of ponds with the containers partially submerged. During the winter months, the plants used in the landscape die back to the ground and they should be mulched in zone 7. Plants in containers should be kept from freezing. I store mine in the garage for the winter. In the greenhouse, plants are over wintered in the cool room at 48°F (9°C) until new growth starts in the spring.
Propagation: Canna x generalis 'Pretoria' is propagated by division.
Canna x generalis 'Pretoria' was featured as Plant of the Week November 26-December 2, 2004.
Guide to Past Plants-of-the-Week:
Cal's Plant of the Week was provided as a service by the University of Oklahoma Department of Microbiology & Plant Biology and specifically the late Cal Lemke, who used to be OU's botany greenhouse grower and an avid gardener at home as well. If the above links don't work, then try the overview site. You may also like to look at the thumbnail index. ©1998-2017 All rights reserved.