These are commonly called "Million Bells" aren't they ? I have never grown them myself, until last summer never even had them !, but I did buy 4 plugs thilast year and popped them into a wrought iron container. The nursery man was explaining to me that germination can be quite difficult and so they always do more than they think they will sell. So I am not a lot of help. I chose them because I have never been successful with Petunias. Once planted though, I found them very manageable and they required no dead heading. I know you plant up a lot, and I think I remember you used them last year. I think they are a very good choice, and I wish you every luck. regards Mrs Bouquet