Northern temperate trees, like wisteria and Kwanzen Cherry need a winter dormancy. Up north, we use 12 to 16 weeks at temperatures between 32 F an 40 F. Time above 40 F is usually not counted (by humans) in figuring out how long to keep in a refrigerated area or outside where it is that cold or colder. This chill period will break winter dormancy. Less than 12 weeks below 40 F and it becomes a crap shoot as to whether or not dormancy requirements will be met.
With the wisteria, it is small enough to put in your refrigerator for 12 weeks. You could then plant it out 3 months later and it should sprout no problem.
With the cherry being 4 feet tall, about all you can do is plant it in the ground and cross your fingers. Corona del Mar, California is along the Pacific coast, south of Los Angeles. Which is probably too warm for the cherry to survive and bloom. But you may as well try. Just plant it in the ground. If it blooms, great. If it doesn't bloom, just grows, that may be okay, it might bloom in the future, or it might just slowly exhaust itself and die because it does not get cold enough in winter to give the tree a proper dormancy.
Look around at local landscape nurseries that are within a few miles of Corona del Mar. If they do not offer Kwanzen cherries, it most likely is because it is too warm to grow them in your area. If they do offer Kwanzen cherries, then they do likely live well in your area.
Just plant 'em and see what happens.
In the future, choose plants that are appropriate for your climate. If you are not sure what is appropriate, walk around your local botanic garden and see what they grow in their outdoor plantings. Also walk around local landscape nurseries and see what they have.
