Gerber daisies were/are the big thing in flowering plants where I live. I found that I wasn't that successful with mine but I really wanted to be because I think they are very pretty and very showy. I bought a good five of them and only two produced a reasonable number of flowers and a couple not at all. (not after the first flower that they had when I bought them). They are quite expensive and I was not pleased with the outcome. How do you grow these successfully?