Canna Lily Red Brilliant Tall Tropical Green Foliage We Grow these Canna Lilies in Vermont These beautiful hardy lush plants reach a height of seven feet with broad green leaves 12 If you would love a garden full of this beauty's, start with a half dozen bulbs. These are rhizomes and propagate by growing new tubers under soil as well as producing abundant seeds. Canna Lillies do very well in this cooler climate possibly due to make use of less sunlight here.