Does Night Blooming Jasmine Tree (Cestrum Nocturnum) grow in Ontario on spring and summer??
Attached is a photo of it.
Night blooming Jasmine (Cestrum nocturnum) is a lovely sub-tropical plant that is not hardy in Toronto or in Ontario. However, if you are asking whether it would survive outdoors during spring and summer, I think that to be on the safe side you would want to wait until early summer when the days and evenings are reliably warm, and to make sure that it is moved back inside before the cool weather begins at the end of summer.
We answered another question about night blooming jasmine, and you might be interested in this post, which contains information about where to search for a plant, and how to care for it:
Resources: as above plus