I have some morning glory of the heavenly blue variety climbing up a
small trellis and they produce around 50 very beautiful flowers each
day at the moment.

The problem is that they are all concentrated near the top of the
trellis. What could I do next year to make them flower lower down?
Will cutting off the growing shoots make them branch out and flower
lower?

Is there a good plant that I could combine with morning glory to
complement the display?

TIA

Mr F.