Tomatoes, strawberries and peppers are self pollinating and while I have not managed a significant crop from my strawberries (I have one of those plantes with holes in the side for plants) they are delicious. You can get a good crop of cherry tomatoes from a few plants - and well I am embarking on my first attempt at peppers this year!
Will check on the bamboo - but you can sink a container! .. I didn't but the living one hasn't spread at all yet - it has yellow leaves and dark stems. The crispy brown one was a dwarf variety .......
Leylandii is a horror - apart from anything else it strips the minerals from the soil :S
Mini lemon trees produce mini lemons that look really cute in a gin and tonic