My garden is on a steep slope so please bear with me while I try to give you a clear picture of the space I'm describing! I have a 65cm square space, approximately 5ft deep, in a bed which is confined by a breeze block wall on two sides. One of the other sides is the border between my garden and my neighbour's garden. It is a shady spot beside a fence and I would really like to plant a fatsia japonica there, but I'm concerned it will a) outgrow the space quite quickly, and/or b) spread into my neighbour's garden because it is blocked by the walls on my side and the roots therefore have no other direction in which to grow.
Please could anyone offer advice about whether this is a good idea or not?!
Thanks very much for any replies, Jen