They make a trowel for corners?

Yeah, but what's the point of going then?

But that plastic netting is a total pain when the season ends. You have to cut all those zip ties and pull dead vines out of every single hole. It's a mess. The wind might not catch it, but it traps moisture against the rail and can rot your plants. A simple freestanding trellis you can move is way less hassle in the long run.