I have some questions that I think are important.... What is your soil like now? What is growing in it? What have you tried to grow that didn't work out? What did work out well? What are you thinking of planting? Do you think you'll have a problem with the bathtub effect? Do you think you have a problem with nutrition or are you just curious about options? You've been given some very good advice which will help you under certain conditions but we don't know your conditions. Inquiring minds would like to know....