Clematis viticella

Hi,I've just planted a clematis this summer,so not very full but has climbed really well with one magnificent bloom on the end ,my question is,I've been told to cut it right back come autumn to make it fuller and stronger next year ,would you agree ?

Hi @dawnm. There are three different pruning groups for Clematis, so it depends which pruning group your clematis is in. https://www.rhs.org.uk/advice/profile?pid=109

Viticella ‘Valour’