The type of rose would be called a Hybrid Tea rose and may or may not be a florist rose. Usually florist roses do not do very well in the garden because they are bred to be grown under very particular conditions in greenhouses. You don't say where you live or what zone but probably, unless you live in Maui or some other tropical place, roses won't get that large for you.

Thanks for the info, Seil. I value your expertise on the forum (long time reader). I suspected it could be an HT of some sort. Left unchecked, roses here easily grow very large & bushy, but I'm more interested in the ones with a tendency to produce upward growing, single stem blooms. I had a young, florist Red Intuition that set some stems like that, on a smaller scale. I'd like to find more of the same, preferably garden types if there are any.

By the way, I'm in South Africa, near Johannesburg, primarily in a dry winter, summer rainfall area with lots of sunshine. Roses do very well here.