clematis

Question

I want to know when bees jubilee and Niobe bloom and how to trim them.

Answer 1

Bees Jubilee blooms from May to June and a second time from August to September. It is a member of Pruning Group 2.
Niobe blooms twice also, at similar times of year as Bees Jubilee.
Both are members of Pruning Group 2, so follow the instructions for Pruning Group 2 in these articles:
https://www.rhs.org.uk/advice/profile?PID=109
https://www.rhs.org.uk/advice/profile?PID=346

(Niobe can optionally be pruned as a Group 2 or a Group 3.)