Canna Cannova® Scarlet (6.5" tall pot)6. 5" tall pot. One of our tropical looking flowers, this tall beauty blooms from Summer through Autumn and grows to about 30 48" tall! Great for landscapes and container plantings in full sun! This plant is a perennial in more Southern zones, however, since we need to dig up the tuber in late Fall here in Ohio, it is considered an annual for us. Store the tubers in a cool, dry place over the winter, and you can replant the following Spring!