Good idea! As Maggie said, I have also heard about the difficulties prisoners face when leaving prison, they either cant get a job due to their criminal record or they end up in prison again (some prisoners prefer to stay in prison as they cant "function" in society). Maybe try expanding on how your idea will better the planet, something with a more direct impact. I really like how you are targeting prisoners to help them achieve a successful/productive life after prison.
Love your idea! I really like how you are aiming your target group at children since they are future and are vital in society. You did a really nice job with your prototype of the garden and the nice infographic to go along with it. I really like how you are using your idea to help the impoverished, help kids get outside, and also as a therapy tool. Have you considered which specific neighborhood you want to target (i.e. San Francisco, Los Angeles, etc..)? Maybe expand on who/where your target group is specifically instead of generally. Overall, really nice idea!