But rooftop agriculture doesn't need to be big, nor does it have to be high tech.
Clearly, the group has started out small. But that's a pretty smart strategy—too many projects burn out after the first year as first-time gardeners get over ambitious and bite off more than they can chew. And clearly, as Jon shows, in the context of a cafe garden, there are some plants (peppers, for example) that will have a hard time contributing much to the demands of the business. But from kale to nasturtiums to herbs, there are plenty of options out there that either yield large amounts of food for minimal effort, or offer high value products that would otherwise have to be paid for.
Check out Jon's recommendations for next year in the video below.