arch for wisteria

Hi

I have a wisteria which it is starting to grow steadily through a wall, and im planning what to do with it next year

I would like to buy an arch, and train it to cover it, but i dont know if it would work. Plants always grow upwards and not downwards, so it means it will not cover the arch isnt it? What i plan to install is something similar to this (imagine the wisteria is already covering the white wall

Thanks

 

Wisteria flowers do hang down and the long summer shoots tend to grow horizontal.
It would work if high enough but the plant would usually be planted on the outside of the arch, I assume yours is against the wall.