Answer: Japanese wisteria is probably more fragrant than the Chinese wisteria, some people do not like the fragrance of the American wisteria. Fragrance is always subjective, though, so you might want to check some actual plants and see what you think in person.
If your vine was started from seed, it may still need to mature before it will bloom. This can take as long as twenty years, but 7 or 8 is often sufficient. In the meantime, you will want to be giving it optimal care to try to get it to bloom as soon as possible. If you purchased a grafted plant, it should bloom assuming it is in full sun, not overfertilized, and is pruned correctly.
Here is some general care and maintenance information for wisteria, to help you review your practices.
Good luck with your wisteria!
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