Edit:
Just realized the correct name for the tree is actually maple.
False friend caused mistake because its name is "Ahorn" in German.
Keeping the heading as it is, because it is funny, although it might trigger the Canadians (sorry, dudes!).
In English, in my opinion at least, "flower" describes the inflorescence at any point in its growth cycle, while "blossom" describes the flower at its fullest development. More often though, "blossom" is used as a verb meaning to bloom or to develop.