Truly green, these flowers range from the color of emeralds to the color of moonlight on white flowers. Mixed with flowers in other more expected colors they add a secret formula of air and life.

At a base cost of US$29.00, residents of the 48 contiguous states can get a petunia (Petunia hybrida) with flowers that look white during the day; but, in the dark, the plant glows a faint green.