They reach a peak at noon and by night they may no longer be fragrant. During twilight hours, these plants may be most appreciated when planted near a terrace or below a bedroom window. Still other plants send out fragrance both day and night, the scent varies during these different times of day. Scent may also vary as the flower begins senescence. Drought and heat can rob the flowers of their sweetness.
Gardens smell sweetest when the air is mild and moisture is high.
During periods of extreme drought and heat, the fragrant ethers are much less and the decrease in scent is noticeable. Frost may release dormant fragrance, as does a rain shower. To add fragrance to the garden, many types of plants may be used, including trees, shrubs, vines and perennials. In central Florida night-blooming jessamine, citrus, gardenia, rose, sweet viburnum, confederate jasmine, butterfly bush , angel's trumpet, Japanese privet and orange jasmine can be planted successfully. South Florida plants include frangipani , Arabian jasmine, lady of the night, gardenia, Japanese privet, crape jasmine , angel's trumpet, orange jasmine, citrus, rose and sweet viburnum.