Does the number of petals on a rose determine its smell or longevity?

The number of petals on a rose does not necessarily determine its smell or longevity. There are many factors that can affect a rose's smell and longevity, such as the species and variety of rose, environmental factors, and the age of the flower.

However, there are some general characteristics that can be associated with certain petal counts. For example, roses with fewer petals tend to have a stronger fragrance, while those with more petals often have a longer vase life.

Ultimately, the best way to determine the smell and longevity of a rose is to examine each individual flower and its growing conditions.