How to Trim Passionflower Vines
The passionflower (Passiflora spp.) genus includes over 400 species of shrubs, trees, annuals, perennials and climbing vines with 3- to 5-inch flowers in shades of white, red, blue and purple. Passionflower gets its name because its petals, filaments, stigma and anthers symbolize the 10 loyal Christian apostles, Jesus' crown of thorns and the nails and wounds inflicted on Christ upon his crucifixion. The nine passionflower species in the United States thrive in U.S. Department of Agriculture plant hardiness zones 6 through 11. With annual growth of up to 20 feet, passionflower vines require frequent pruning to control growth.