How to soften impact of newly added garden cabin
Used to be a Laburnum tree (sorry but tree had to go due to no working from home space inside house).
Wondering if there is any planting I could do to soften it. Behind it my neighbour did have a large box hedge just on his side of fence but was wiped out by caterpillars so he removed it. I have a paved triangular space on my side right behind the cabin. I could put some large pot but would have to be very tall to be visible above the cabin. Any ideas on what I could plant there? Also, it's on a concrete base. Would you plant anything next to it in a mini border or just leave to lawn. Don't really want high maintenance.
Finally, I have a galvanised wire trellis above the brick wall supported by 3 wooden fence posts. I was thinking of getting some extenders and adding another 50 cm in height. This would take it above neighbours fenceline (Behind cabin) is this prohibited/bad etiquette to have a trellis higher than fence line? The other house at the back of my border (left side of pic) wouldn't be affected since there is that structure but I would like to cover that with a higher trellis too. Got climbing roses, rambling roses, star jasmine, clematis, honeysuckle and climbing hydrangea (mostly planted in the last couple if years but should get bigger next summer). Would you raise the height of trellis?