Hello fellow fragrance buffs:
I would like to point your attention to the thread linked below from the Begonia Forum here on GW that talks about fragrant begonias.
I am growing two fragrant tuberhybrida begonias right now: 'John Smith' and 'Pink Scentiment'. While the 'Pink Scentiment' is still too small to flower, the 'John Smith' has an *unopened* bud which is exuding a strong and beautiful perfume like ripe sweet peaches/nectarines with an undertone of rose. It is truly wonderful and I can't wait to smell it once it opens fully.
Here is a link that might be useful: Fragrant Begonias thread...