Salvia splendens........a very tender perennial grown as an annual in all but the warmest locations. Below a zone 10, you would need to overwinter indoors.

No, I wouldn't bother cos they are easy to raise from seed (but I don't much like them either).

Gardengal and rosaprimula,

thanks both for your replies. I am attracted to the colors. I found them in a farmer’s market and they do not carry the same varieries each year. Good to know it is easy to grow them from seeds. I will also try to overwinter them in garage

Yep, splendens is more commonly red. I am immune to it's charms after being mortified by certain patriotic UK bedding schemes featuring alyssum, salvia and lobelia erinus (I don't grow alyssum or lobelia either)