Looks like my Canna Lily. Mine are out doors, heavily mulched, in full sun. They are next to the house near the down spouts which is perfect because they love lots of water. They multiply readily but are easily kept in check by dividing up the rhizomes and moving them around the yard (or sharing with friends : ) They get about 4 to 5 feet tall and produce loads of lovely flowers, great for cutting. They need very little care and are not bothered by many pests. They are not supposed to overwinter here in Zone 6B but by planting next to the house and mulching well in the fall we are able to enjoy them year after year.