Shortly afterward, I had to spray the roses with a fungicide. Now they are no longer fragrant. My passion fruit vine keeps dropping its buds. I have it in a plastic pot with drainage holes. Fragrance generally depends not only on a person's sensitivity to scent, but also on weather and stage of growth.
Some roses are most fragrant when they're in the early flowering period.
Others are more fragrant when fully open. Perhaps your roses are sweeter when less open. Warm temperatures and humidity are also said to enhance fragrance. Hybrid teas are grown for their long stems and elegant blooms. Heavy rain, cool temperatures and lack of sunshine have triggered bud drop in various types of plants this spring.