Where can I find information on organic gardening for patios?

Image by whalt
Pictures from our trip to Napa Valley, California

Question by Sarah: Where can I find information on organic gardening for patios?
I live in an apartment, but grew up in the country. One thing I miss about that was having the space to have a garden. I also live in Arizona (moved from Louisiana) so the climate is much different from what I’m used to.

Does anyone know where I can find any information on starting an organic, edible garden with limited space, such as on a patio?

Can you help? Leave your own answer in the comments!