Autumn prune clematis?
Helen Yemm said "late flowering clematis, the popular viticella hybrids, Jackmanii and so on, can be cut back in the autumn". I also remember Monty Don saying this somewhere. I know my Etoile Voilette is a viticella and last year I did this and then cut it to the ground in spring as well, and it flowered well as usual. I'd like to do this with my other clematis because they look so scruffy in winter but what is a "viticella" and do any of my other clematis fall into this category? Piilu Little Duckling, Niobe, The President, Dr Ruppel, Forida Sieboldii. Thank you.