Create community around edible indigenous plants already growing in and around the city.
Building on urban harvesting and the inspiring comments posted, the idea of foraging could be enhanced by emphasizing identifying and educating about native edible species. What they are, where and how to find them and what to do with them once you do.
"Australian aborigines selected food which was available and ate it for nutritional purposes. There was no refrigeration or storage containers. Local knowledge of which plants were edible, palatable, or delicious, as well as the best time for harvest, harvest and preparation methods, were passed down by word of mouth to the next generation. Some plants or their fruits are less toxic at cetain times.
Aborigines generally did not boil water, so their cooking methods (and hence their menus) were different from those used by the early settlers and modern users. They did not have pots or pans, although northern tribes were known to have used bailer shells. They did not make tea or coffee, nor similar drinks. They did not make jams, jellies, or chutneys, and made little use of flavourings.
Apart from Bunya nuts they only used food from their tribal area and did not trade."
A website and mobile app on urban harvesting could include a section devoted solely to finding, preparing and eating wild local food and the stories behind it. As Kimberly Fisher commented on urban harvesting, it could be open source, allowing people to share their knowledge about all facets of each food, down to images with which to identify things and multimedia stories about their history, current use etc. Curation could help present this info in a clear and visual way.
Local restaurants could feature menu items based on locally foraged food and hand out a mini recipe/plant guide with info about what they used and easy ways for customers to find and use it themselves. The guide might look a little bit like the second image above, and people could collect them at different restaurants and go to the website to find more info, recipes, images, stories, etc.
A few more links:
What do you think?