Sudip Ghimire ----- Sudip, In addition to each of Kavana G. B items add these…From above and below ground will be numerous threats to well being of the plants and soil. Add the threat from lack of experience and any part of the growing process. Add patience to sustain the farm/garden over a long season and long hours of physical labor in many tasks. Add the ability to maintain tools, machinery, moisture and soil daily and over the season. To the latter the ability to protect from unusual wind, light and temperature fluctuations. Lastly, add the ability to adapt to change.
I see all the above replies have mentioned nature factors, so I wouldn't repeat them. In addition, if starting with the term "designing", the first thing I would consider is the function of the space: (1) what kind of activities to happen in the space and (2) if the space is capable of those functions (with all of it nature characteristics). Only after that we can do or ask the next questions.