Pruning baby wisteria
I planted a Japanese wisteria a couple of years ago. It's not doing much, though I suspect then endless invasion of couch grass doesn't help that at all.
I'll be carefully removing the grass yet again, but should I prune it this year and if so where and when?
There's side branches low down (orange area) and near the top of the main stem (red). It is ultimately supposed to be climbing over an arch.