Sunflowers

Hi, I have a question please. I recently bought two potted sunflower plants. This is the first time I have ever seen potted sunflowers. They have always been just in the seed form before. These have several flowers on each of the stems. The name on the tag calls them; Helianthus annus Ballad Very little information was given on the card that came with them. Can anyone tell me if these are annuals or perennials? I sure hope they will come back again next year. All the information seemed to say is that they require a lot of water. Any information will be very much appreciated. Thanks so much in advance to any answers. Sandy