aww gee. I was hoping to a reply to this. I bought a Pink MArina Kordana last year, I think at Walmart. I bought a red mini too, and planted them both together in a much larger pot. I don't remember feeding it last year. I left it on my protected back porch during the winter, and now it's (they) are leafing out. I moved them to the steps where they'll get more rain and sun. So far so good. I don;t have the best track record for minis, but I keep trying. I do remember dead heading it last year, I think that helped.
Excited to see it bloom again...i love anything that blooms, and I've forgotten how this one looks.
Generally I don't know what I'm doing when buy any kind of rose...I'm just gambling.