How can we get more people to start gardening? SPIN farming is one answer, because it is a system of using existing land in cities, and existing infrastructure of city water to turn land into productive urban farms. There is a free online course beginning on this topic, and I have joined as a student. I want to share it with anyone who would like to be an urban farmer and make a living doing it.
Here is a link to the free course: http://groaction.com/urbanfarm/index2
Here is a link to what Rob Hopkins (transition towns) says about SPIN farming: http://transitionculture.org/2011/09/05/spin-farming-basics-a-book-review/