Your in Toronto, Canada. Whether it is a Satsuki azalea, or a "Florist's azalea" care in your climate would be nearly identical, neither would be hardy in your climate. Florist's azalea tend to be less cold tolerant than Satsuki, because they are bred for easy bloom induction. (easy to force to bloom off season). Basically, treat it like a Satsuki, or more generally, an evergreen azalea. I have kept a few florist's types going for a number of years. I summer them outdoors, bring them in before temperatures go much below freezing. I winter them in my cold well house, it stays between 32 to 40 F or 0 to 4 C. Bring them out in spring, do the "inside and outside" dance to avoid late frosts. They really respond well to Satsuki techniques. Pretty, regardless which variety it is.
Biggest difference between florist's azalea hybrids and Satsuki hybrids is flower size. The larger flower size means that when you place branches, you need to allow room for the large flowers to display well. When you get to the stage where you have many flowers, you might have to remove some, just so others have room to open. You may find yourself removing more than half the flower buds just to get better spacing of the flowers.
While training and growing it for bonsai, many growers remove flower buds as soon as they form, in order to keep the plant putting energy into growth, rather than bloom. Myself I tend to let them flower regardless of stage. It is the flowers that endear them to me, so I like the reward, even if doing so slows development.
