You can grow virtually anything in a pot providing you have the correct size and compost.. You can grow small trees, shrubs, edible stuff - anything!! As before - start by going to a good garden centre for advice.
I can only grow in pots at the back of my house and have used http://www.crocus.co.uk for my plants.They have a section where you can type in what soil,sun or shade etc to get advice.The plants have been great and grown brilliantly.