Please can anyone recommend a tree for my small garden. The tree will stand in the South East Corner and is required for screening above a 6ft fence, Ideally a tree with a single trunk if you know what I mean. I would love a Robinia but know that that is too big, but a similar yellow or lime green leaved tree would be perfect. Alternatively I am thinking about a crab apple tree, in pink but am open to any suggestions. Any help will be much appreciated.