They're not as fragrant as the fragrans, however they have a very nice fragrance which is fairly strong. One thing you have to watch out for with the heterophyllus is it's sharper than it looks, watch out when you try to sniff the flowers. I decided on a delvayi after scratching hands and nose repeatedly on the heterophyllus.

O. heterophyllus has a light scent that reminds me of witchhazel.

I just bought both locally last fall, and they are looking great during the winter, so I'm hopeful for blooms this year. They will make attractive shrubs and heterphyllus would make a nice holly sub for Christmas. I bought them instead of O. fragrans because they are hardier, but you could certainly get fragrans where you live.

Another very fragrant wafting shrub is Elaeagnus ebbingei. I bought a very small E. pungens last fall but haven't smelled it yet.

Osmanthus delavayi is quite fragrant, smells like plumeria. In fact, I wonder if O. fragrans is really more fragrant. Haven't been around it enough to notice.

I didn't mean to but ended up finding a Osmanthus fragrans Nanjing Beauty and buying it. My O. delavayi is covered with flower buds soon to open, can't wait!

Love Osmanthus delavayi, but doesn't it take years to produce flower? (I heard, at least, 3 years.) Nice thing about it, it can be potted.