This bulletin follows the trial of Clematis alpina and C. macropetala at RHS Garden Wisley. The trial was initially grown at a site in Wisley Village, planted in 1997. Plants did not establish well and many suffered from late frost damage. The trial was propagated in 1999 and planted in April 2001 at Howard’s Field in Wisley Garden. The objectives of the trial were to compare and assess old and new cultivars, recommend the AGM to those considered the best and check nomenclature. There were 16 AGMs awarded.