We bought the original Evening Primrose plant about 15 years ago and since then it has self seeded faithfully. It is a biennial so it only appears in this form every two years, and it is so nice to see it again! This one is growing through the cracks of the patio ... The scent is gorgeous, particularly in the evening, and each flower only lasts a day or two, although there are plenty on the stem to keep it going over a week or two.