I have built a planter, triangular in shape 2ft x 2ft x 3ft with trellis 2m high on two of the sides. What I am looking for is an evergreen cliber that will grow dense enough for nesting birds. I am not particularly bothered about what it may look like, the primary function is to serve wildlife.
I am VERY new to gradening and only just finding my feet so any advise at all would be most welcome.
Thank you for reading!