Live for one season Must be replaced each spring Bloom all summer long, up until frost (if kept deadheaded) Compact root systems; adapt well to small containers Can plant in decorative containers that could be damaged by winter weather No dividing necessary Do not overwinter Live for two or more years Will resprout each spring from overwintered roots Peak bloom often lasts a few weeks; may bloom sporadically throughout summer More extensive root systems require generously-sized containers Must use weather-proof containers. May need dividing every few years May need protection to survive harsh winters