Yes, they get the same food as other roses. If in a container, then if you are using something like MiracleGro, then use at half-strength with each watering.

Mini refers to the size of the bloom, not the size of the plant. You don't say what the variety names are, or the size of the pot, but they will need to be separated once they take off. I have minis that are 3.5' tall.

They are hardy. If these were bought in a grocery store, those were grown in a greenhouse, and need time to get used to being outdoors. Once outdoors, they should be hardy enough.

I'm not sure of the names. I bought them at Lowe's a few weeks ago. They are in about a 2 gallon cedar planked planter. I had no idea they could get so big! Wow.

If I can figure out how to load them into my posts, maybe I could take some pictures and someone here could help me identify them?

For the moment they seem to be really happy and are blooming. I'll feed them this week when I do the 'regular' bushes.

Thanks so much for the help :)