Green Roof Growers “We’re growing heirloom vegetables on our respective rooftops in the City of Chicago using homemade *sub-irrigated planters* (SIPs) and commercially available Earthboxes™. We want to show other landless city residents how they can do the same.” (tags: chicago food blog gardening) DIYcity “Twitter bots, aggregators, social software, mobile apps – we use [...]