Canna, or Indian Shot, is an annual in northern climates; growing from a tuberous root that needs to be dug out and stored at the end of each growing season. Though this makes for a little extra work, the late summer to fall blooms are worth the effort – especially in areas where hot sun is present as they can withstand (and actually thrive in) such heat. Cannas grow up to 6′, but are only zone 7 tolerant.