by Ruben H The same day you do that you might get someone out to clean up the neighborhood/clean up nearby lots and clean up graffiti in a three block area near your empty lot.

by Ardyce E If the gardeners don't own the plot, they're trespassing. So one would need a contract with the owner.

by Patrick B4 How about trees?
http://www.myplanphx.com/shaping-phoenix-s-future/trees-trees-trees

by Charles H11 Encourage local neighborhood associations and block watches to adopt the plots and insure proper maintenance of them

by Bob D3 That would have the added benefit of not requiring any watering.