Does cherry blossom tree grow in Saskatoon ?

Probably not. You might make a sour cherry for a couple years, then get a really cold winter. 

Only in a heated greenhouse. Meaning no freezing winters.  That is why they grow where the weather is more milder for fruit trees.

However I would say yes , no motivation behind why , except if your scope is higher at that point japan , yet both japan and saskatoon snow in any case , yet be cautious about the snow profundity

As long as you plant a Cherry tree then it will blossom almost anywhere.

depends but i would say yes , no reason why  , unless your latitude is higher then japan , but both  japan and saskatoon snow anyway , but be careful of the snow depth .

yes that is my understanding

yes, but They are also known as Japanese cherry and sakura. They generally refer to ornamental cherry trees, not too edible cherry trees. It is considered the national flower of Japan.

Well, they grow in Moosejaw so I guess they'd grow in Saskatoon too.

Oh hell yes                 !

anything is possible