Passiflora caerulea is a climbing plant with beautiful ivory-white-blue passion flowers. This is the best known variety because it is best suited for our climate and reasonably Hardy. You can expect flowers in the Passion Flower from June to September. The Passion Flower is a real fair-weather bloomer. On warm days with lots of light and sun, the buds will pop open. On colder and darker days, few flowers will pop open. It is a real climber and therefore likes some support when growing on a climbing frame or fence.