By Slimdil
Northumberland,
United Kingdom 
What am I doing wrong to make this Clematis Sunset flower mainly at the top? Tidied it up after flowering last year then gave it its proper prune in Spring (pruning group 2 on label).
25 Sep, 2016
Answers
Its just what they do - I've got Clematis Niobe, which is the same prune group as yours, and the flowers are mostly all towards the top, specially the later flowers.
25 Sep, 2016
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Look at this for pruning advice.
https://www.rhs.org.uk/advice/profile?PID=346#section-3
25 Sep, 2016