Posted: 15/11/2015 at 10:42
The one reason I'd use trellis is that it looks infinitely better than wires when plants like Clematis and Rose have died back for the winter, especially if it's a site you can see form the house.
Actually, two reasons - wires need to be attached quite close together so that self climbers like clematis can reach the next one 'up' easily if you're not quick enough to get them tied in. The growth can be quite heavy very quickly, and can become difficult to tie in without it breaking.
I use both options depending on the site and the type of plant.
Sorry if I've confused you now!