Clematis

This is Clematis 'Fuji-musume' growing in a pot in my garden. I've had it since 2010 & its not growing terribly well. I'm a bit nervous about doing anything with it but I think I'll have to try - the flowers are huge & the colour is beautiful. The description on the label is Wedgewood blue - but despite its Japanese varietal name I think of it as China blue.