It seems like some varieties are annuals, some biennials, and some perennials, but since we’ve been in the house 3 years now, and they have come up each year, it seems our pretty pink ones are perennials. I really love these flowers, even though their darker counterparts are associated with death, I think they look really fun and summery. They started to bloom a few weeks ago, and will continue to bloom well into the summer. If there isn’t a regular rain (read: you are in a drought), you need to water them every once & awhile, but overall these have been really low maintenance.