The scent of Agastache comes from the volatile oils in the leaves. You generally need to brush against them or rub the leaves to release the smell. If it's a really hot, dry day then you may be able to smell it some if standing very nearby. It is not a fragrance emitted by the flower to attract pollinators, like in roses. Hummingbird-adapted plants don't usually have a flower fragrance because hummingbirds have very little sense of smell.
Grape-Scented Sage (Salvia melissodora) does have fragrant flowers as well as scented leaves. I'm not sure how it performs in Florida, though.
This Salvia & Agastache cousin has fragrant flowers and is attractive to hummingbirds. It is a southern African plant so it wasn't adapted for hummingbird use, but they love it anyway. It can be hard to find for sale, though.
Northern Chinese-Hats (Karomia tettensis)
