Nothing is quite like a stunning tropical climber or tropical vine amongst summer bedding or growing up a warm house wall. They always bring happy memories of holidays in the Caribbean and their sheer exuberance and rampant growth can be surprising even in our luke warm summers. Not many are really hardy, although Passiflora Caerulea is root hardy and the vine stems can stand up to -10˚C given a protected wall. Similarly Campsis Radicans can just about tolerate -10˚C given similar protection. Another alternative is to grow fast growing perennial tropical climbers as annuals, and if sown early can become quite a show piece. If you are lucky enough to have a heated conservatory or greenhouse the range of tropical climbers you can try growing is simply stunning.