Canna Lilies are just great. Tropical leaves and stunning flowers. They can get a bit ugly if not taken care of, but they do really well and grow fast. Just beautiful. This photo is not very useful, but this is where all the flowers emerge from. almost a dozen "spears" will pop out from the top of the plant and produce these vibrant flowers, they will die and drop their seeds, which are pretty large and that's how the spread. I think they are actually quite easy to maintain and easy to pull out and remove. Fast growing and luscious borders can be grown with Canna Lilies!