Our garden boundary, what are my rights?

DougMLancs

You’ll struggle to keep even a clumping bamboo in your average plastic container- it’ll end up distorting and cracking it after a year or so. Other grasses like Miscanthus and Calamagrostis can make a good screen since their foliage and seed heads stay through the winter. Miscanthus seedheads are a lovely colour too. Just give the old foliage the chop at 20cm when you see new growth coming in spring and that’s all your maintenance done. Other good see through plants are things like Verbena bonariensis whick you could mix in for some colour. All come in various heights from 80cm to about 1.6m depending on the variety.

GDB2222

Bamboo does have a bad reputation.  I know that there are different types, but it seems an unnecessary risk.

WeAreGhosts

I have Fargesia nitida 'Winter Joy' in my garden (no container or root barrier). It's a clumping variety where the foliage is quite dense at the top and middle of the plant and the base remains compact. It does grow new shoots from the bottom but does this in a circle around the base. The base of mine has widened by about 15cm since it was put in four years ago. I don't expect it to widen much more. It grows quick and it has an airy habit, also very hardy.